git.gag.com Git - fw/altos/blob - altoslib/AltosState.java

   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 /*
  20  * Track flight state from telemetry or eeprom data stream
  21  */
  22
  23 package org.altusmetrum.altoslib_11;
  24
  25 import java.io.*;
  26
  27 public class AltosState extends AltosFlightListener implements Cloneable {
  28
  29         public static final int set_position = 1;
  30         public static final int set_gps = 2;
  31         public static final int set_data = 4;
  32
  33         public int set;
  34
  35         static final double filter_len = 2.0;
  36         static final double ascent_filter_len = 0.5;
  37         static final double descent_filter_len = 5.0;
  38
  39         /* derived data */
  40
  41         public long     received_time;
  42
  43         public double   time;
  44         public double   prev_time;
  45         public double   time_change;
  46         private int     prev_tick;
  47
  48         class AltosValue {
  49                 double  value;
  50                 double  prev_value;
  51                 private double  max_value;
  52                 private double  set_time;
  53                 private double  prev_set_time;
  54
  55                 boolean can_max() { return true; }
  56
  57                 void set(double new_value, double time) {
  58                         if (new_value != AltosLib.MISSING) {
  59                                 value = new_value;
  60                                 if (can_max() && (max_value == AltosLib.MISSING || value > max_value))
  61                                         max_value = value;
  62                                 set_time = time;
  63                         }
  64                 }
  65
  66                 void set_filtered(double new_value, double time) {
  67                         if (prev_value != AltosLib.MISSING) {
  68                                 double f = 1/Math.exp((time - prev_set_time) / filter_len);
  69                                 new_value = f * new_value + (1-f) * prev_value;
  70                         }
  71                         set(new_value, time);
  72                 }
  73
  74                 double value() {
  75                         return value;
  76                 }
  77
  78                 double max() {
  79                         return max_value;
  80                 }
  81
  82                 double prev() {
  83                         return prev_value;
  84                 }
  85
  86                 double change() {
  87                         if (value != AltosLib.MISSING && prev_value != AltosLib.MISSING)
  88                                 return value - prev_value;
  89                         return AltosLib.MISSING;
  90                 }
  91
  92                 double rate() {
  93                         double c = change();
  94                         double t = set_time - prev_set_time;
  95
  96                         if (c != AltosLib.MISSING && t != 0)
  97                                 return c / t;
  98                         return AltosLib.MISSING;
  99                 }
 100
 101                 double integrate() {
 102                         if (value == AltosLib.MISSING)
 103                                 return AltosLib.MISSING;
 104                         if (prev_value == AltosLib.MISSING)
 105                                 return AltosLib.MISSING;
 106
 107                         return (value + prev_value) / 2 * (set_time - prev_set_time);
 108                 }
 109
 110                 double time() {
 111                         return set_time;
 112                 }
 113
 114                 void set_derivative(AltosValue in) {
 115                         double  n = in.rate();
 116
 117                         if (n == AltosLib.MISSING)
 118                                 return;
 119
 120                         double  p = prev_value;
 121                         double  pt = prev_set_time;
 122
 123                         if (p == AltosLib.MISSING) {
 124                                 p = 0;
 125                                 pt = in.time() - 0.01;
 126                         }
 127
 128                         /* Clip changes to reduce noise */
 129                         double  ddt = in.time() - pt;
 130                         double  ddv = (n - p) / ddt;
 131
 132                         final double max = 100000;
 133
 134                         /* 100gs */
 135                         if (Math.abs(ddv) > max) {
 136                                 if (n > p)
 137                                         n = p + ddt * max;
 138                                 else
 139                                         n = p - ddt * max;
 140                         }
 141
 142                         double filter_len;
 143
 144                         if (ascent)
 145                                 filter_len = ascent_filter_len;
 146                         else
 147                                 filter_len = descent_filter_len;
 148
 149                         double f = 1/Math.exp(ddt/ filter_len);
 150                         n = p * f + n * (1-f);
 151
 152                         set(n, in.time());
 153                 }
 154
 155                 void set_integral(AltosValue in) {
 156                         double  change = in.integrate();
 157
 158                         if (change != AltosLib.MISSING) {
 159                                 double  prev = prev_value;
 160                                 if (prev == AltosLib.MISSING)
 161                                         prev = 0;
 162                                 set(prev + change, in.time());
 163                         }
 164                 }
 165
 166                 void copy(AltosValue old) {
 167                         value = old.value;
 168                         set_time = old.set_time;
 169                         prev_value = old.value;
 170                         prev_set_time = old.set_time;
 171                         max_value = old.max_value;
 172                 }
 173
 174                 void finish_update() {
 175                         prev_value = value;
 176                         prev_set_time = set_time;
 177                 }
 178
 179                 AltosValue() {
 180                         value = AltosLib.MISSING;
 181                         prev_value = AltosLib.MISSING;
 182                         max_value = AltosLib.MISSING;
 183                 }
 184
 185         }
 186
 187         class AltosCValue {
 188
 189                 class AltosIValue extends AltosValue {
 190                         boolean can_max() {
 191                                 return c_can_max();
 192                         }
 193
 194                         AltosIValue() {
 195                                 super();
 196                         }
 197                 };
 198
 199                 public AltosIValue      measured;
 200                 public AltosIValue      computed;
 201
 202                 boolean can_max() { return true; }
 203
 204                 boolean c_can_max() { return can_max(); }
 205
 206                 double value() {
 207                         double v = measured.value();
 208                         if (v != AltosLib.MISSING)
 209                                 return v;
 210                         return computed.value();
 211                 }
 212
 213                 boolean is_measured() {
 214                         return measured.value() != AltosLib.MISSING;
 215                 }
 216
 217                 double max() {
 218                         double m = measured.max();
 219
 220                         if (m != AltosLib.MISSING)
 221                                 return m;
 222                         return computed.max();
 223                 }
 224
 225                 double prev_value() {
 226                         if (measured.value != AltosLib.MISSING && measured.prev_value != AltosLib.MISSING)
 227                                 return measured.prev_value;
 228                         return computed.prev_value;
 229                 }
 230
 231                 AltosValue altos_value() {
 232                         if (measured.value() != AltosLib.MISSING)
 233                                 return measured;
 234                         return computed;
 235                 }
 236
 237                 double change() {
 238                         double c = measured.change();
 239                         if (c == AltosLib.MISSING)
 240                                 c = computed.change();
 241                         return c;
 242                 }
 243
 244                 double rate() {
 245                         double r = measured.rate();
 246                         if (r == AltosLib.MISSING)
 247                                 r = computed.rate();
 248                         return r;
 249                 }
 250
 251                 void set_measured(double new_value, double time) {
 252                         measured.set(new_value, time);
 253                 }
 254
 255                 void set_computed(double new_value, double time) {
 256                         computed.set(new_value, time);
 257                 }
 258
 259                 void set_derivative(AltosValue in) {
 260                         computed.set_derivative(in);
 261                 }
 262
 263                 void set_derivative(AltosCValue in) {
 264                         set_derivative(in.altos_value());
 265                 }
 266
 267                 void set_integral(AltosValue in) {
 268                         computed.set_integral(in);
 269                 }
 270
 271                 void set_integral(AltosCValue in) {
 272                         set_integral(in.altos_value());
 273                 }
 274
 275                 void copy(AltosCValue old) {
 276                         measured.copy(old.measured);
 277                         computed.copy(old.computed);
 278                 }
 279
 280                 void finish_update() {
 281                         measured.finish_update();
 282                         computed.finish_update();
 283                 }
 284
 285                 public AltosCValue() {
 286                         measured = new AltosIValue();
 287                         computed = new AltosIValue();
 288                 }
 289         }
 290
 291         private int     state;
 292         public int      flight;
 293         public int      serial;
 294         public int      altitude_32;
 295         public int      receiver_serial;
 296         public boolean  landed;
 297         public boolean  ascent; /* going up? */
 298         public boolean  boost;  /* under power */
 299         public int      rssi;
 300         public int      status;
 301         public int      device_type;
 302         public int      config_major;
 303         public int      config_minor;
 304         public int      apogee_delay;
 305         public int      main_deploy;
 306         public int      flight_log_max;
 307
 308         private double pressure_to_altitude(double p) {
 309                 if (p == AltosLib.MISSING)
 310                         return AltosLib.MISSING;
 311                 return AltosConvert.pressure_to_altitude(p);
 312         }
 313
 314         private AltosCValue ground_altitude;
 315
 316         public double ground_altitude() {
 317                 return ground_altitude.value();
 318         }
 319
 320         public void set_ground_altitude(double a) {
 321                 ground_altitude.set_measured(a, time);
 322         }
 323
 324         class AltosGpsGroundAltitude extends AltosValue {
 325                 void set(double a, double t) {
 326                         super.set(a, t);
 327                         pad_alt = value();
 328                         gps_altitude.set_gps_height();
 329                 }
 330
 331                 void set_filtered(double a, double t) {
 332                         super.set_filtered(a, t);
 333                         pad_alt = value();
 334                         gps_altitude.set_gps_height();
 335                 }
 336
 337                 AltosGpsGroundAltitude() {
 338                         super();
 339                 }
 340         }
 341
 342         private AltosGpsGroundAltitude gps_ground_altitude;
 343
 344         public double gps_ground_altitude() {
 345                 return gps_ground_altitude.value();
 346         }
 347
 348         public void set_gps_ground_altitude(double a) {
 349                 gps_ground_altitude.set(a, time);
 350         }
 351
 352         class AltosGroundPressure extends AltosCValue {
 353                 void set_filtered(double p, double time) {
 354                         computed.set_filtered(p, time);
 355                         if (!is_measured())
 356                                 ground_altitude.set_computed(pressure_to_altitude(computed.value()), time);
 357                 }
 358
 359                 void set_measured(double p, double time) {
 360                         super.set_measured(p, time);
 361                         ground_altitude.set_computed(pressure_to_altitude(p), time);
 362                 }
 363
 364                 AltosGroundPressure () {
 365                         super();
 366                 }
 367         }
 368
 369         private AltosGroundPressure ground_pressure;
 370
 371         public double ground_pressure() {
 372                 return ground_pressure.value();
 373         }
 374
 375         public void set_ground_pressure (double pressure) {
 376                 ground_pressure.set_measured(pressure, time);
 377         }
 378
 379         class AltosAltitude extends AltosCValue {
 380
 381                 private void set_speed(AltosValue v) {
 382                         if (!acceleration.is_measured() || !ascent)
 383                                 speed.set_derivative(this);
 384                 }
 385
 386                 void set_computed(double a, double time) {
 387                         super.set_computed(a,time);
 388                         set_speed(computed);
 389                         set |= set_position;
 390                 }
 391
 392                 void set_measured(double a, double time) {
 393                         super.set_measured(a,time);
 394                         set_speed(measured);
 395                         set |= set_position;
 396                 }
 397
 398                 AltosAltitude() {
 399                         super();
 400                 }
 401         }
 402
 403         private AltosAltitude   altitude;
 404
 405         class AltosGpsAltitude extends AltosValue {
 406
 407                 private void set_gps_height() {
 408                         double  a = value();
 409                         double  g = gps_ground_altitude.value();
 410
 411                         if (a != AltosLib.MISSING && g != AltosLib.MISSING)
 412                                 gps_height = a - g;
 413                         else
 414                                 gps_height = AltosLib.MISSING;
 415                 }
 416
 417                 void set(double a, double t) {
 418                         super.set(a, t);
 419                         set_gps_height();
 420                 }
 421
 422                 AltosGpsAltitude() {
 423                         super();
 424                 }
 425         }
 426
 427         private AltosGpsAltitude        gps_altitude;
 428
 429         private AltosValue              gps_ground_speed;
 430         private AltosValue              gps_ascent_rate;
 431         private AltosValue              gps_course;
 432         private AltosValue              gps_speed;
 433
 434         public double altitude() {
 435                 double a = altitude.value();
 436                 if (a != AltosLib.MISSING)
 437                         return a;
 438                 return gps_altitude.value();
 439         }
 440
 441         public double max_altitude() {
 442                 double a = altitude.max();
 443                 if (a != AltosLib.MISSING)
 444                         return a;
 445                 return gps_altitude.max();
 446         }
 447
 448         public void set_altitude(double new_altitude) {
 449                 altitude.set_measured(new_altitude, time);
 450         }
 451
 452         public double gps_altitude() {
 453                 return gps_altitude.value();
 454         }
 455
 456         public double max_gps_altitude() {
 457                 return gps_altitude.max();
 458         }
 459
 460         public void set_gps_altitude(double new_gps_altitude) {
 461                 gps_altitude.set(new_gps_altitude, time);
 462         }
 463
 464         public double gps_ground_speed() {
 465                 return gps_ground_speed.value();
 466         }
 467
 468         public double max_gps_ground_speed() {
 469                 return gps_ground_speed.max();
 470         }
 471
 472         public double gps_ascent_rate() {
 473                 return gps_ascent_rate.value();
 474         }
 475
 476         public double max_gps_ascent_rate() {
 477                 return gps_ascent_rate.max();
 478         }
 479
 480         public double gps_course() {
 481                 return gps_course.value();
 482         }
 483
 484         public double gps_speed() {
 485                 return gps_speed.value();
 486         }
 487
 488         public double max_gps_speed() {
 489                 return gps_speed.max();
 490         }
 491
 492         class AltosPressure extends AltosValue {
 493                 void set(double p, double time) {
 494                         super.set(p, time);
 495                         if (state == AltosLib.ao_flight_pad)
 496                                 ground_pressure.set_filtered(p, time);
 497                         double a = pressure_to_altitude(p);
 498                         altitude.set_computed(a, time);
 499                 }
 500
 501                 AltosPressure() {
 502                         super();
 503                 }
 504         }
 505
 506         private AltosPressure   pressure;
 507
 508         public double pressure() {
 509                 return pressure.value();
 510         }
 511
 512         public void set_pressure(double p) {
 513                 pressure.set(p, time);
 514         }
 515
 516         class AltosForce extends AltosValue {
 517                 void set(double p, double time) {
 518                         super.set(p, time);
 519                 }
 520
 521                 AltosForce() {
 522                         super();
 523                 }
 524         }
 525         private AltosForce      thrust;
 526
 527         public double thrust() {
 528                 return thrust.value();
 529         }
 530
 531         public void set_thrust(double N) {
 532                 thrust.set(N, time);
 533         }
 534
 535         public double baro_height() {
 536                 double a = altitude();
 537                 double g = ground_altitude();
 538                 if (a != AltosLib.MISSING && g != AltosLib.MISSING)
 539                         return a - g;
 540                 return AltosLib.MISSING;
 541         }
 542
 543         public double height() {
 544                 double k = kalman_height.value();
 545                 if (k != AltosLib.MISSING)
 546                         return k;
 547
 548                 double b = baro_height();
 549                 if (b != AltosLib.MISSING)
 550                         return b;
 551
 552                 return gps_height();
 553         }
 554
 555         public double max_height() {
 556                 double  k = kalman_height.max();
 557                 if (k != AltosLib.MISSING)
 558                         return k;
 559
 560                 double a = altitude.max();
 561                 double g = ground_altitude();
 562                 if (a != AltosLib.MISSING && g != AltosLib.MISSING)
 563                         return a - g;
 564                 return max_gps_height();
 565         }
 566
 567         public double gps_height() {
 568                 double a = gps_altitude();
 569                 double g = gps_ground_altitude();
 570
 571                 if (a != AltosLib.MISSING && g != AltosLib.MISSING)
 572                         return a - g;
 573                 return AltosLib.MISSING;
 574         }
 575
 576         public double max_gps_height() {
 577                 double a = gps_altitude.max();
 578                 double g = gps_ground_altitude();
 579
 580                 if (a != AltosLib.MISSING && g != AltosLib.MISSING)
 581                         return a - g;
 582                 return AltosLib.MISSING;
 583         }
 584
 585         class AltosSpeed extends AltosCValue {
 586
 587                 boolean can_max() {
 588                         return state < AltosLib.ao_flight_fast || state == AltosLib.ao_flight_stateless;
 589                 }
 590
 591                 void set_accel() {
 592                         acceleration.set_derivative(this);
 593                 }
 594
 595                 void set_derivative(AltosCValue in) {
 596                         super.set_derivative(in);
 597                         set_accel();
 598                 }
 599
 600                 void set_computed(double new_value, double time) {
 601                         super.set_computed(new_value, time);
 602                         set_accel();
 603                 }
 604
 605                 void set_measured(double new_value, double time) {
 606                         super.set_measured(new_value, time);
 607                         set_accel();
 608                 }
 609
 610                 AltosSpeed() {
 611                         super();
 612                 }
 613         }
 614
 615         private AltosSpeed speed;
 616
 617         public double speed() {
 618                 double v = kalman_speed.value();
 619                 if (v != AltosLib.MISSING)
 620                         return v;
 621                 v = speed.value();
 622                 if (v != AltosLib.MISSING)
 623                         return v;
 624                 v = gps_speed();
 625                 if (v != AltosLib.MISSING)
 626                         return v;
 627                 return AltosLib.MISSING;
 628         }
 629
 630         public double max_speed() {
 631                 double v = kalman_speed.max();
 632                 if (v != AltosLib.MISSING)
 633                         return v;
 634                 v = speed.max();
 635                 if (v != AltosLib.MISSING)
 636                         return v;
 637                 v = max_gps_speed();
 638                 if (v != AltosLib.MISSING)
 639                         return v;
 640                 return AltosLib.MISSING;
 641         }
 642
 643         class AltosAccel extends AltosCValue {
 644
 645                 boolean can_max() {
 646                         return state < AltosLib.ao_flight_fast || state == AltosLib.ao_flight_stateless;
 647                 }
 648
 649                 void set_measured(double a, double time) {
 650                         super.set_measured(a, time);
 651                         if (ascent)
 652                                 speed.set_integral(this.measured);
 653                 }
 654
 655                 AltosAccel() {
 656                         super();
 657                 }
 658         }
 659
 660         AltosAccel acceleration;
 661
 662         public double acceleration() {
 663                 return acceleration.value();
 664         }
 665
 666         public double max_acceleration() {
 667                 return acceleration.max();
 668         }
 669
 670         public AltosCValue      orient;
 671
 672         public void set_orient(double new_orient) {
 673                 orient.set_measured(new_orient, time);
 674         }
 675
 676         public double orient() {
 677                 return orient.value();
 678         }
 679
 680         public double max_orient() {
 681                 return orient.max();
 682         }
 683
 684         public AltosValue       kalman_height, kalman_speed, kalman_acceleration;
 685
 686         public void set_kalman(double height, double speed, double acceleration) {
 687                 kalman_height.set(height, time);
 688                 kalman_speed.set(speed, time);
 689                 kalman_acceleration.set(acceleration, time);
 690         }
 691
 692         public double   battery_voltage;
 693         public double   pyro_voltage;
 694         public double   temperature;
 695         public double   apogee_voltage;
 696         public double   main_voltage;
 697
 698         public double   ignitor_voltage[];
 699
 700         public AltosGPS gps;
 701         public AltosGPS temp_gps;
 702         public int temp_gps_sat_tick;
 703         public boolean  gps_pending;
 704         public int gps_sequence;
 705
 706         public AltosIMU imu;
 707         public AltosMag mag;
 708
 709         public static final int MIN_PAD_SAMPLES = 10;
 710
 711         public int      npad;
 712         public int      gps_waiting;
 713         public boolean  gps_ready;
 714
 715         public int      ngps;
 716
 717         public AltosGreatCircle from_pad;
 718         public double   elevation;      /* from pad */
 719         public double   range;          /* total distance */
 720
 721         public double   gps_height;
 722
 723         public double pad_lat, pad_lon, pad_alt;
 724
 725         public int      speak_tick;
 726         public double   speak_altitude;
 727
 728         public String   callsign;
 729         public String   firmware_version;
 730
 731         public double   accel_plus_g;
 732         public double   accel_minus_g;
 733         public double   accel;
 734         public double   ground_accel;
 735         public double   ground_accel_avg;
 736
 737         public int      log_format;
 738         public int      log_space;
 739         public String   product;
 740
 741         public AltosMs5607      baro;
 742
 743         public AltosCompanion   companion;
 744
 745         public int      pyro_fired;
 746
 747         public void set_npad(int npad) {
 748                 this.npad = npad;
 749                 gps_waiting = MIN_PAD_SAMPLES - npad;
 750                 if (this.gps_waiting < 0)
 751                         gps_waiting = 0;
 752                 gps_ready = gps_waiting == 0;
 753         }
 754
 755         public void init() {
 756                 set = 0;
 757
 758                 received_time = System.currentTimeMillis();
 759                 time = AltosLib.MISSING;
 760                 time_change = AltosLib.MISSING;
 761                 prev_time = AltosLib.MISSING;
 762                 tick = AltosLib.MISSING;
 763                 prev_tick = AltosLib.MISSING;
 764                 boost_tick = AltosLib.MISSING;
 765                 state = AltosLib.ao_flight_invalid;
 766                 flight = AltosLib.MISSING;
 767                 landed = false;
 768                 boost = false;
 769                 rssi = AltosLib.MISSING;
 770                 status = 0;
 771                 device_type = AltosLib.MISSING;
 772                 config_major = AltosLib.MISSING;
 773                 config_minor = AltosLib.MISSING;
 774                 apogee_delay = AltosLib.MISSING;
 775                 main_deploy = AltosLib.MISSING;
 776                 flight_log_max = AltosLib.MISSING;
 777
 778                 ground_altitude = new AltosCValue();
 779                 ground_pressure = new AltosGroundPressure();
 780                 altitude = new AltosAltitude();
 781                 pressure = new AltosPressure();
 782                 thrust = new AltosForce();
 783                 speed = new AltosSpeed();
 784                 acceleration = new AltosAccel();
 785                 orient = new AltosCValue();
 786
 787                 temperature = AltosLib.MISSING;
 788                 battery_voltage = AltosLib.MISSING;
 789                 pyro_voltage = AltosLib.MISSING;
 790                 apogee_voltage = AltosLib.MISSING;
 791                 main_voltage = AltosLib.MISSING;
 792                 ignitor_voltage = null;
 793
 794                 kalman_height = new AltosValue();
 795                 kalman_speed = new AltosValue();
 796                 kalman_acceleration = new AltosValue();
 797
 798                 gps = null;
 799                 temp_gps = null;
 800                 temp_gps_sat_tick = 0;
 801                 gps_sequence = 0;
 802                 gps_pending = false;
 803
 804                 imu = null;
 805                 last_imu_time = AltosLib.MISSING;
 806                 rotation = null;
 807                 ground_rotation = null;
 808
 809                 mag = null;
 810                 accel_zero_along = AltosLib.MISSING;
 811                 accel_zero_across = AltosLib.MISSING;
 812                 accel_zero_through = AltosLib.MISSING;
 813
 814                 accel_ground_along = AltosLib.MISSING;
 815                 accel_ground_across = AltosLib.MISSING;
 816                 accel_ground_through = AltosLib.MISSING;
 817
 818                 pad_orientation = AltosLib.MISSING;
 819
 820                 gyro_zero_roll = AltosLib.MISSING;
 821                 gyro_zero_pitch = AltosLib.MISSING;
 822                 gyro_zero_yaw = AltosLib.MISSING;
 823
 824                 set_npad(0);
 825                 ngps = 0;
 826
 827                 from_pad = null;
 828                 elevation = AltosLib.MISSING;
 829                 range = AltosLib.MISSING;
 830                 gps_height = AltosLib.MISSING;
 831
 832                 pad_lat = AltosLib.MISSING;
 833                 pad_lon = AltosLib.MISSING;
 834                 pad_alt = AltosLib.MISSING;
 835
 836                 gps_altitude = new AltosGpsAltitude();
 837                 gps_ground_altitude = new AltosGpsGroundAltitude();
 838                 gps_ground_speed = new AltosValue();
 839                 gps_speed = new AltosValue();
 840                 gps_ascent_rate = new AltosValue();
 841                 gps_course = new AltosValue();
 842
 843                 speak_tick = AltosLib.MISSING;
 844                 speak_altitude = AltosLib.MISSING;
 845
 846                 callsign = null;
 847                 firmware_version = null;
 848
 849                 accel_plus_g = AltosLib.MISSING;
 850                 accel_minus_g = AltosLib.MISSING;
 851                 accel = AltosLib.MISSING;
 852
 853                 ground_accel = AltosLib.MISSING;
 854                 ground_accel_avg = AltosLib.MISSING;
 855
 856                 log_format = AltosLib.MISSING;
 857                 log_space = AltosLib.MISSING;
 858                 product = null;
 859                 serial = AltosLib.MISSING;
 860                 receiver_serial = AltosLib.MISSING;
 861                 altitude_32 = AltosLib.MISSING;
 862
 863                 baro = null;
 864                 companion = null;
 865
 866                 pyro_fired = 0;
 867         }
 868
 869         void finish_update() {
 870                 prev_tick = tick;
 871
 872                 ground_altitude.finish_update();
 873                 altitude.finish_update();
 874                 pressure.finish_update();
 875                 speed.finish_update();
 876                 acceleration.finish_update();
 877                 orient.finish_update();
 878
 879                 kalman_height.finish_update();
 880                 kalman_speed.finish_update();
 881                 kalman_acceleration.finish_update();
 882         }
 883
 884         void copy(AltosState old) {
 885
 886                 if (old == null) {
 887                         init();
 888                         return;
 889                 }
 890
 891                 super.copy(old);
 892
 893                 received_time = old.received_time;
 894                 time = old.time;
 895                 time_change = old.time_change;
 896                 prev_time = old.time;
 897
 898                 tick = old.tick;
 899                 prev_tick = old.tick;
 900                 boost_tick = old.boost_tick;
 901
 902                 state = old.state;
 903                 flight = old.flight;
 904                 landed = old.landed;
 905                 ascent = old.ascent;
 906                 boost = old.boost;
 907                 rssi = old.rssi;
 908                 status = old.status;
 909                 device_type = old.device_type;
 910                 config_major = old.config_major;
 911                 config_minor = old.config_minor;
 912                 apogee_delay = old.apogee_delay;
 913                 main_deploy = old.main_deploy;
 914                 flight_log_max = old.flight_log_max;
 915
 916                 set = 0;
 917
 918                 ground_pressure.copy(old.ground_pressure);
 919                 ground_altitude.copy(old.ground_altitude);
 920                 altitude.copy(old.altitude);
 921                 pressure.copy(old.pressure);
 922                 speed.copy(old.speed);
 923                 acceleration.copy(old.acceleration);
 924                 orient.copy(old.orient);
 925
 926                 battery_voltage = old.battery_voltage;
 927                 pyro_voltage = old.pyro_voltage;
 928                 temperature = old.temperature;
 929                 apogee_voltage = old.apogee_voltage;
 930                 main_voltage = old.main_voltage;
 931                 ignitor_voltage = old.ignitor_voltage;
 932
 933                 kalman_height.copy(old.kalman_height);
 934                 kalman_speed.copy(old.kalman_speed);
 935                 kalman_acceleration.copy(old.kalman_acceleration);
 936
 937                 if (old.gps != null)
 938                         gps = old.gps.clone();
 939                 else
 940                         gps = null;
 941                 if (old.temp_gps != null)
 942                         temp_gps = old.temp_gps.clone();
 943                 else
 944                         temp_gps = null;
 945                 temp_gps_sat_tick = old.temp_gps_sat_tick;
 946                 gps_sequence = old.gps_sequence;
 947                 gps_pending = old.gps_pending;
 948
 949                 if (old.imu != null)
 950                         imu = old.imu.clone();
 951                 else
 952                         imu = null;
 953                 last_imu_time = old.last_imu_time;
 954
 955                 if (old.rotation != null)
 956                         rotation = new AltosRotation (old.rotation);
 957
 958                 if (old.ground_rotation != null) {
 959                         ground_rotation = new AltosRotation(old.ground_rotation);
 960                 }
 961
 962                 accel_zero_along = old.accel_zero_along;
 963                 accel_zero_across = old.accel_zero_across;
 964                 accel_zero_through = old.accel_zero_through;
 965
 966                 accel_ground_along = old.accel_ground_along;
 967                 accel_ground_across = old.accel_ground_across;
 968                 accel_ground_through = old.accel_ground_through;
 969                 pad_orientation = old.pad_orientation;
 970
 971                 gyro_zero_roll = old.gyro_zero_roll;
 972                 gyro_zero_pitch = old.gyro_zero_pitch;
 973                 gyro_zero_yaw = old.gyro_zero_yaw;
 974
 975                 if (old.mag != null)
 976                         mag = old.mag.clone();
 977                 else
 978                         mag = null;
 979
 980                 npad = old.npad;
 981                 gps_waiting = old.gps_waiting;
 982                 gps_ready = old.gps_ready;
 983                 ngps = old.ngps;
 984
 985                 if (old.from_pad != null)
 986                         from_pad = old.from_pad.clone();
 987                 else
 988                         from_pad = null;
 989
 990                 elevation = old.elevation;
 991                 range = old.range;
 992
 993                 gps_height = old.gps_height;
 994
 995                 gps_altitude.copy(old.gps_altitude);
 996                 gps_ground_altitude.copy(old.gps_ground_altitude);
 997                 gps_ground_speed.copy(old.gps_ground_speed);
 998                 gps_ascent_rate.copy(old.gps_ascent_rate);
 999                 gps_course.copy(old.gps_course);
1000                 gps_speed.copy(old.gps_speed);
1001
1002                 pad_lat = old.pad_lat;
1003                 pad_lon = old.pad_lon;
1004                 pad_alt = old.pad_alt;
1005
1006                 speak_tick = old.speak_tick;
1007                 speak_altitude = old.speak_altitude;
1008
1009                 callsign = old.callsign;
1010                 firmware_version = old.firmware_version;
1011
1012                 accel_plus_g = old.accel_plus_g;
1013                 accel_minus_g = old.accel_minus_g;
1014                 accel = old.accel;
1015                 ground_accel = old.ground_accel;
1016                 ground_accel_avg = old.ground_accel_avg;
1017
1018                 log_format = old.log_format;
1019                 log_space = old.log_space;
1020                 product = old.product;
1021                 serial = old.serial;
1022                 receiver_serial = old.receiver_serial;
1023                 altitude_32 = old.altitude_32;
1024
1025                 baro = old.baro;
1026                 companion = old.companion;
1027
1028                 pyro_fired = old.pyro_fired;
1029         }
1030
1031         void update_time() {
1032         }
1033
1034         void update_gps() {
1035                 elevation = AltosLib.MISSING;
1036                 range = AltosLib.MISSING;
1037
1038                 if (gps == null)
1039                         return;
1040
1041                 if (gps.locked && gps.nsat >= 4) {
1042                         /* Track consecutive 'good' gps reports, waiting for 10 of them */
1043                         if (state == AltosLib.ao_flight_pad || state == AltosLib.ao_flight_stateless) {
1044                                 set_npad(npad+1);
1045                                 if (pad_lat != AltosLib.MISSING && (npad < 10 || state == AltosLib.ao_flight_pad)) {
1046                                         pad_lat = (pad_lat * 31 + gps.lat) / 32;
1047                                         pad_lon = (pad_lon * 31 + gps.lon) / 32;
1048                                         gps_ground_altitude.set_filtered(gps.alt, time);
1049                                 }
1050                         }
1051                         if (pad_lat == AltosLib.MISSING) {
1052                                 pad_lat = gps.lat;
1053                                 pad_lon = gps.lon;
1054                                 gps_ground_altitude.set(gps.alt, time);
1055                         }
1056                         gps_altitude.set(gps.alt, time);
1057                         if (gps.climb_rate != AltosLib.MISSING)
1058                                 gps_ascent_rate.set(gps.climb_rate, time);
1059                         if (gps.ground_speed != AltosLib.MISSING)
1060                                 gps_ground_speed.set(gps.ground_speed, time);
1061                         if (gps.climb_rate != AltosLib.MISSING && gps.ground_speed != AltosLib.MISSING)
1062                                 gps_speed.set(Math.sqrt(gps.ground_speed * gps.ground_speed +
1063                                                         gps.climb_rate * gps.climb_rate), time);
1064                         if (gps.course != AltosLib.MISSING)
1065                                 gps_course.set(gps.course, time);
1066                 }
1067                 if (gps.lat != 0 && gps.lon != 0 &&
1068                     pad_lat != AltosLib.MISSING &&
1069                     pad_lon != AltosLib.MISSING)
1070                 {
1071                         double h = height();
1072
1073                         if (h == AltosLib.MISSING)
1074                                 h = 0;
1075                         from_pad = new AltosGreatCircle(pad_lat, pad_lon, 0, gps.lat, gps.lon, h);
1076                         elevation = from_pad.elevation;
1077                         range = from_pad.range;
1078                 }
1079         }
1080
1081         public void set_tick(int new_tick) {
1082                 if (new_tick != AltosLib.MISSING) {
1083                         if (prev_tick != AltosLib.MISSING) {
1084                                 while (new_tick < prev_tick - 1000) {
1085                                         new_tick += 65536;
1086                                 }
1087                         }
1088                         tick = new_tick;
1089                         time = tick / 100.0;
1090                         time_change = time - prev_time;
1091                 }
1092         }
1093
1094         public String state_name() {
1095                 return AltosLib.state_name(state);
1096         }
1097
1098         public void set_product(String product) {
1099                 this.product = product;
1100         }
1101
1102         public void set_state(int state) {
1103                 if (state != AltosLib.ao_flight_invalid) {
1104                         this.state = state;
1105                         ascent = (AltosLib.ao_flight_boost <= state &&
1106                                   state <= AltosLib.ao_flight_coast);
1107                         boost = (AltosLib.ao_flight_boost == state);
1108                 }
1109         }
1110
1111         public int state() {
1112                 return state;
1113         }
1114
1115         public void set_device_type(int device_type) {
1116                 this.device_type = device_type;
1117                 switch (device_type) {
1118                 case AltosLib.product_telegps:
1119                         this.state = AltosLib.ao_flight_stateless;
1120                         break;
1121                 }
1122         }
1123
1124         public void set_log_format(int log_format) {
1125                 this.log_format = log_format;
1126                 switch (log_format) {
1127                 case AltosLib.AO_LOG_FORMAT_TELEGPS:
1128                         this.state = AltosLib.ao_flight_stateless;
1129                         break;
1130                 }
1131         }
1132
1133         public void set_log_space(int log_space) {
1134                 this.log_space = log_space;
1135         }
1136
1137         public void set_flight_params(int apogee_delay, int main_deploy) {
1138                 this.apogee_delay = apogee_delay;
1139                 this.main_deploy = main_deploy;
1140         }
1141
1142         public void set_config(int major, int minor, int flight_log_max) {
1143                 config_major = major;
1144                 config_minor = minor;
1145                 this.flight_log_max = flight_log_max;
1146         }
1147
1148         public void set_callsign(String callsign) {
1149                 this.callsign = callsign;
1150         }
1151
1152         public void set_firmware_version(String version) {
1153                 firmware_version = version;
1154         }
1155
1156         public int compare_version(String other_version) {
1157                 if (firmware_version == null)
1158                         return AltosLib.MISSING;
1159                 return AltosLib.compare_version(firmware_version, other_version);
1160         }
1161
1162         private void re_init() {
1163                 int bt = boost_tick;
1164                 int rs = receiver_serial;
1165                 init();
1166                 boost_tick = bt;
1167                 receiver_serial = rs;
1168         }
1169
1170         public void set_flight(int flight) {
1171
1172                 /* When the flight changes, reset the state */
1173                 if (flight != AltosLib.MISSING) {
1174                         if (this.flight != AltosLib.MISSING &&
1175                             this.flight != flight) {
1176                                 re_init();
1177                         }
1178                         this.flight = flight;
1179                 }
1180         }
1181
1182         public void set_serial(int serial) {
1183                 /* When the serial changes, reset the state */
1184                 if (serial != AltosLib.MISSING) {
1185                         if (this.serial != AltosLib.MISSING &&
1186                             this.serial != serial) {
1187                                 re_init();
1188                         }
1189                         this.serial = serial;
1190                 }
1191         }
1192
1193         public void set_receiver_serial(int serial) {
1194                 if (serial != AltosLib.MISSING)
1195                         receiver_serial = serial;
1196         }
1197
1198         public boolean altitude_32() {
1199                 return altitude_32 == 1;
1200         }
1201
1202         public void set_altitude_32(int altitude_32) {
1203                 if (altitude_32 != AltosLib.MISSING)
1204                         this.altitude_32 = altitude_32;
1205         }
1206
1207         public int rssi() {
1208                 if (rssi == AltosLib.MISSING)
1209                         return 0;
1210                 return rssi;
1211         }
1212
1213         public void set_rssi(int rssi, int status) {
1214                 if (rssi != AltosLib.MISSING) {
1215                         this.rssi = rssi;
1216                         this.status = status;
1217                 }
1218         }
1219
1220         public void set_received_time(long ms) {
1221                 received_time = ms;
1222         }
1223
1224         public void set_gps(AltosGPS gps, int sequence) {
1225                 if (gps != null) {
1226                         this.gps = gps.clone();
1227                         gps_sequence = sequence;
1228                         update_gps();
1229                         set |= set_gps;
1230                 }
1231         }
1232
1233
1234         public double   accel_zero_along;
1235         public double   accel_zero_across;
1236         public double   accel_zero_through;
1237
1238         public AltosRotation    rotation;
1239         public AltosRotation    ground_rotation;
1240
1241         public void set_accel_zero(double zero_along, double zero_across, double zero_through) {
1242                 if (zero_along != AltosLib.MISSING) {
1243                         accel_zero_along = zero_along;
1244                         accel_zero_across = zero_across;
1245                         accel_zero_through = zero_through;
1246                 }
1247         }
1248
1249         public int pad_orientation;
1250
1251         public double   accel_ground_along, accel_ground_across, accel_ground_through;
1252
1253         void update_pad_rotation() {
1254                 if (pad_orientation != AltosLib.MISSING && accel_ground_along != AltosLib.MISSING) {
1255                         rotation = new AltosRotation(AltosIMU.convert_accel(accel_ground_across - accel_zero_across),
1256                                                      AltosIMU.convert_accel(accel_ground_through - accel_zero_through),
1257                                                      AltosIMU.convert_accel(accel_ground_along - accel_zero_along),
1258                                                      pad_orientation);
1259                         ground_rotation = rotation;
1260                         orient.set_computed(rotation.tilt(), time);
1261                 }
1262         }
1263
1264         public void set_accel_ground(double ground_along, double ground_across, double ground_through) {
1265                 accel_ground_along = ground_along;
1266                 accel_ground_across = ground_across;
1267                 accel_ground_through = ground_through;
1268                 update_pad_rotation();
1269         }
1270
1271         public void set_pad_orientation(int pad_orientation) {
1272                 this.pad_orientation = pad_orientation;
1273                 update_pad_rotation();
1274         }
1275
1276         public double   gyro_zero_roll;
1277         public double   gyro_zero_pitch;
1278         public double   gyro_zero_yaw;
1279
1280         public void set_gyro_zero(double roll, double pitch, double yaw) {
1281                 if (roll != AltosLib.MISSING) {
1282                         gyro_zero_roll = roll;
1283                         gyro_zero_pitch = pitch;
1284                         gyro_zero_yaw = yaw;
1285                 }
1286         }
1287
1288         public double   last_imu_time;
1289
1290         private double radians(double degrees) {
1291                 if (degrees == AltosLib.MISSING)
1292                         return AltosLib.MISSING;
1293                 return degrees * Math.PI / 180.0;
1294         }
1295
1296         private void update_orient() {
1297                 if (last_imu_time != AltosLib.MISSING) {
1298                         double  t = time - last_imu_time;
1299
1300                         double  pitch = radians(gyro_pitch());
1301                         double  yaw = radians(gyro_yaw());
1302                         double  roll = radians(gyro_roll());
1303
1304                         if (t > 0 & pitch != AltosLib.MISSING && rotation != null) {
1305                                 rotation.rotate(t, pitch, yaw, roll);
1306                                 orient.set_computed(rotation.tilt(), time);
1307                         }
1308                 }
1309                 last_imu_time = time;
1310         }
1311
1312         public void set_imu(AltosIMU imu) {
1313                 if (imu != null)
1314                         imu = imu.clone();
1315                 this.imu = imu;
1316                 update_orient();
1317         }
1318
1319         private double gyro_zero_overflow(double first) {
1320                 double v = first / 128.0;
1321                 if (v < 0)
1322                         v = Math.ceil(v);
1323                 else
1324                         v = Math.floor(v);
1325                 return v * 128.0;
1326         }
1327
1328         public void check_imu_wrap(AltosIMU imu) {
1329                 if (this.imu == null) {
1330                         gyro_zero_roll += gyro_zero_overflow(imu.gyro_roll);
1331                         gyro_zero_pitch += gyro_zero_overflow(imu.gyro_pitch);
1332                         gyro_zero_yaw += gyro_zero_overflow(imu.gyro_yaw);
1333                 }
1334         }
1335
1336         public double accel_along() {
1337                 if (imu != null && accel_zero_along != AltosLib.MISSING)
1338                         return AltosIMU.convert_accel(imu.accel_along - accel_zero_along);
1339                 return AltosLib.MISSING;
1340         }
1341
1342         public double accel_across() {
1343                 if (imu != null && accel_zero_across != AltosLib.MISSING)
1344                         return AltosIMU.convert_accel(imu.accel_across - accel_zero_across);
1345                 return AltosLib.MISSING;
1346         }
1347
1348         public double accel_through() {
1349                 if (imu != null && accel_zero_through != AltosLib.MISSING)
1350                         return AltosIMU.convert_accel(imu.accel_through - accel_zero_through);
1351                 return AltosLib.MISSING;
1352         }
1353
1354         public double gyro_roll() {
1355                 if (imu != null && gyro_zero_roll != AltosLib.MISSING) {
1356                         return AltosIMU.convert_gyro(imu.gyro_roll - gyro_zero_roll);
1357                 }
1358                 return AltosLib.MISSING;
1359         }
1360
1361         public double gyro_pitch() {
1362                 if (imu != null && gyro_zero_pitch != AltosLib.MISSING) {
1363                         return AltosIMU.convert_gyro(imu.gyro_pitch - gyro_zero_pitch);
1364                 }
1365                 return AltosLib.MISSING;
1366         }
1367
1368         public double gyro_yaw() {
1369                 if (imu != null && gyro_zero_yaw != AltosLib.MISSING) {
1370                         return AltosIMU.convert_gyro(imu.gyro_yaw - gyro_zero_yaw);
1371                 }
1372                 return AltosLib.MISSING;
1373         }
1374
1375         public void set_mag(AltosMag mag) {
1376                 this.mag = mag.clone();
1377         }
1378
1379         public double mag_along() {
1380                 if (mag != null)
1381                         return AltosMag.convert_gauss(mag.along);
1382                 return AltosLib.MISSING;
1383         }
1384
1385         public double mag_across() {
1386                 if (mag != null)
1387                         return AltosMag.convert_gauss(mag.across);
1388                 return AltosLib.MISSING;
1389         }
1390
1391         public double mag_through() {
1392                 if (mag != null)
1393                         return AltosMag.convert_gauss(mag.through);
1394                 return AltosLib.MISSING;
1395         }
1396
1397         public AltosMs5607 make_baro() {
1398                 if (baro == null)
1399                         baro = new AltosMs5607();
1400                 return baro;
1401         }
1402
1403         public void set_ms5607(AltosMs5607 ms5607) {
1404                 baro = ms5607;
1405
1406                 if (baro != null && baro.pa != AltosLib.MISSING && baro.cc != AltosLib.MISSING) {
1407                         set_pressure(baro.pa);
1408                         set_temperature(baro.cc / 100.0);
1409                 }
1410         }
1411
1412         public void set_ms5607(int pres, int temp) {
1413                 if (baro != null) {
1414                         baro.set(pres, temp);
1415
1416                         set_pressure(baro.pa);
1417                         set_temperature(baro.cc / 100.0);
1418                 }
1419         }
1420
1421         public void set_companion(AltosCompanion companion) {
1422                 this.companion = companion;
1423         }
1424
1425         void update_accel() {
1426                 if (accel == AltosLib.MISSING)
1427                         return;
1428                 if (accel_plus_g == AltosLib.MISSING)
1429                         return;
1430                 if (accel_minus_g == AltosLib.MISSING)
1431                         return;
1432
1433                 double counts_per_g = (accel_minus_g - accel_plus_g) / 2.0;
1434                 double counts_per_mss = counts_per_g / 9.80665;
1435                 acceleration.set_measured((accel_plus_g - accel) / counts_per_mss, time);
1436         }
1437
1438         public void set_accel_g(double accel_plus_g, double accel_minus_g) {
1439                 if (accel_plus_g != AltosLib.MISSING) {
1440                         this.accel_plus_g = accel_plus_g;
1441                         this.accel_minus_g = accel_minus_g;
1442                         update_accel();
1443                 }
1444         }
1445
1446         public void set_ground_accel(double ground_accel) {
1447                 if (ground_accel != AltosLib.MISSING)
1448                         this.ground_accel = ground_accel;
1449         }
1450
1451         public void set_accel(double accel) {
1452                 if (accel != AltosLib.MISSING) {
1453                         this.accel = accel;
1454                         if (state == AltosLib.ao_flight_pad) {
1455                                 if (ground_accel_avg == AltosLib.MISSING)
1456                                         ground_accel_avg = accel;
1457                                 else
1458                                         ground_accel_avg = (ground_accel_avg * 7 + accel) / 8;
1459                         }
1460                 }
1461                 update_accel();
1462         }
1463
1464         public void set_temperature(double temperature) {
1465                 if (temperature != AltosLib.MISSING) {
1466                         this.temperature = temperature;
1467                         set |= set_data;
1468                 }
1469         }
1470
1471         public void set_battery_voltage(double battery_voltage) {
1472                 if (battery_voltage != AltosLib.MISSING) {
1473                         this.battery_voltage = battery_voltage;
1474                         set |= set_data;
1475                 }
1476         }
1477
1478         public void set_pyro_voltage(double pyro_voltage) {
1479                 if (pyro_voltage != AltosLib.MISSING) {
1480                         this.pyro_voltage = pyro_voltage;
1481                         set |= set_data;
1482                 }
1483         }
1484
1485         public void set_apogee_voltage(double apogee_voltage) {
1486                 if (apogee_voltage != AltosLib.MISSING) {
1487                         this.apogee_voltage = apogee_voltage;
1488                         set |= set_data;
1489                 }
1490         }
1491
1492         public void set_main_voltage(double main_voltage) {
1493                 if (main_voltage != AltosLib.MISSING) {
1494                         this.main_voltage = main_voltage;
1495                         set |= set_data;
1496                 }
1497         }
1498
1499         public void set_ignitor_voltage(double[] voltage) {
1500                 this.ignitor_voltage = voltage;
1501         }
1502
1503         public void set_pyro_fired(int fired) {
1504                 this.pyro_fired = fired;
1505         }
1506
1507         public double time_since_boost() {
1508                 if (tick == AltosLib.MISSING)
1509                         return 0.0;
1510
1511                 if (boost_tick == AltosLib.MISSING)
1512                         return tick / 100.0;
1513                 return (tick - boost_tick) / 100.0;
1514         }
1515
1516         public boolean valid() {
1517                 return tick != AltosLib.MISSING && serial != AltosLib.MISSING;
1518         }
1519
1520         public void set_temp_gps() {
1521                 set_gps(temp_gps, gps_sequence + 1);
1522                 gps_pending = false;
1523                 super.set_temp_gps();
1524         }
1525
1526         public void set_config_data(AltosConfigData config_data) {
1527                 if (config_data.callsign != null)
1528                         set_callsign(config_data.callsign);
1529                 if (config_data.accel_cal_plus != AltosLib.MISSING &&
1530                     config_data.accel_cal_minus != AltosLib.MISSING)
1531                         set_accel_g(config_data.accel_cal_plus, config_data.accel_cal_minus);
1532                 if (config_data.product != null)
1533                         set_product(config_data.product);
1534                 if (config_data.log_format != AltosLib.MISSING)
1535                         set_log_format(config_data.log_format);
1536                 if (config_data.serial != AltosLib.MISSING)
1537                         set_serial(config_data.serial);
1538                 AltosMs5607 ms5607 = new AltosMs5607(config_data);
1539                 if (ms5607.valid_config())
1540                         set_ms5607(ms5607);
1541         }
1542
1543         public AltosState clone() {
1544                 AltosState s = new AltosState();
1545                 s.copy(this);
1546
1547                 /* Code to test state save/restore. Enable only for that purpose
1548                  */
1549                 if (false) {
1550                         AltosJson       json = new AltosJson(this);
1551                         String          onetrip = json.toPrettyString();
1552                         AltosJson       back = AltosJson.fromString(onetrip);
1553                         AltosState      tripstate = (AltosState) back.make(this.getClass());
1554                         AltosJson       tripjson = new AltosJson(tripstate);
1555                         String          twotrip = tripjson.toPrettyString();
1556
1557                         if (!onetrip.equals(twotrip)) {
1558                                 try {
1559                                         FileWriter one_file = new FileWriter("one.json", true);
1560                                         one_file.write(onetrip);
1561                                         one_file.flush();
1562                                         FileWriter two_file = new FileWriter("two.json", true);
1563                                         two_file.write(twotrip);
1564                                         two_file.flush();
1565                                 } catch (Exception e) {
1566                                 }
1567                                 System.out.printf("json error\n");
1568                                 System.exit(1);
1569                         }
1570                 }
1571                 return s;
1572         }
1573
1574         public AltosState () {
1575                 init();
1576         }
1577 }