3 # Copyright 2004,2005,2007 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr, gru
24 from gnuradio import usrp
25 from usrpm import usrp_dbid
26 from gnuradio import eng_notation
27 from gnuradio.eng_option import eng_option
28 from gnuradio.wxgui import stdgui2, ra_fftsink, ra_stripchartsink, ra_waterfallsink, form, slider
29 from optparse import OptionParser
37 class app_flow_graph(stdgui2.std_top_block):
38 def __init__(self, frame, panel, vbox, argv):
39 stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
44 parser = OptionParser(option_class=eng_option)
45 parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
46 help="select USRP Rx side A or B (default=A)")
47 parser.add_option("-d", "--decim", type="int", default=16,
48 help="set fgpa decimation rate to DECIM [default=%default]")
49 parser.add_option("-f", "--freq", type="eng_float", default=None,
50 help="set frequency to FREQ", metavar="FREQ")
51 parser.add_option("-a", "--avg", type="eng_float", default=1.0,
52 help="set spectral averaging alpha")
53 parser.add_option("-i", "--integ", type="eng_float", default=1.0,
54 help="set integration time")
55 parser.add_option("-g", "--gain", type="eng_float", default=None,
56 help="set gain in dB (default is midpoint)")
57 parser.add_option("-l", "--reflevel", type="eng_float", default=30.0,
58 help="Set Total power reference level")
59 parser.add_option("-y", "--division", type="eng_float", default=0.5,
60 help="Set Total power Y division size")
61 parser.add_option("-e", "--longitude", type="eng_float", default=-76.02,help="Set Observer Longitude")
62 parser.add_option("-c", "--latitude", type="eng_float", default=44.85,help="Set Observer Latitude")
63 parser.add_option("-o", "--observing", type="eng_float", default=0.0,
64 help="Set observing frequency")
65 parser.add_option("-x", "--ylabel", default="dB", help="Y axis label")
66 parser.add_option("-z", "--divbase", type="eng_float", default=0.025, help="Y Division increment base")
67 parser.add_option("-v", "--stripsize", type="eng_float", default=2400, help="Size of stripchart, in 2Hz samples")
68 parser.add_option("-F", "--fft_size", type="eng_float", default=1024, help="Size of FFT")
69 parser.add_option("-N", "--decln", type="eng_float", default=999.99, help="Observing declination")
70 parser.add_option("-X", "--prefix", default="./")
71 parser.add_option("-M", "--fft_rate", type="eng_float", default=8.0, help="FFT Rate")
72 parser.add_option("-A", "--calib_coeff", type="eng_float", default=1.0, help="Calibration coefficient")
73 parser.add_option("-B", "--calib_offset", type="eng_float", default=0.0, help="Calibration coefficient")
74 parser.add_option("-W", "--waterfall", action="store_true", default=False, help="Use Waterfall FFT display")
75 parser.add_option("-S", "--setimode", action="store_true", default=False, help="Enable SETI processing of spectral data")
76 parser.add_option("-K", "--setik", type="eng_float", default=1.5, help="K value for SETI analysis")
77 parser.add_option("-T", "--setibandwidth", type="eng_float", default=12500, help="Instantaneous SETI observing bandwidth--must be divisor of 250Khz")
78 parser.add_option("-Q", "--seti_range", type="eng_float", default=1.0e6, help="Total scan width, in Hz for SETI scans")
79 parser.add_option("-Z", "--dual_mode", action="store_true",
80 default=False, help="Dual-polarization mode")
81 parser.add_option("-I", "--interferometer", action="store_true", default=False, help="Interferometer mode")
82 parser.add_option("-D", "--switch_mode", action="store_true", default=False, help="Dicke Switching mode")
83 parser.add_option("-P", "--reference_divisor", type="eng_float", default=1.0, help="Reference Divisor")
84 parser.add_option("-U", "--ref_fifo", default="@@@@")
85 parser.add_option("-n", "--notches", action="store_true",
86 default=False, help="Notch frequencies after all other args")
87 (options, args) = parser.parse_args()
89 self.setimode = options.setimode
90 self.dual_mode = options.dual_mode
91 self.interferometer = options.interferometer
92 self.normal_mode = False
93 self.switch_mode = options.switch_mode
95 self.reference_divisor = options.reference_divisor
96 self.ref_fifo = options.ref_fifo
99 self.notches = Numeric.zeros(self.NOTCH_TAPS,Numeric.Float64)
100 # Get notch locations
103 self.notches[j] = float(i)
106 self.use_notches = options.notches
108 if (self.ref_fifo != "@@@@"):
109 self.ref_fifo_file = open (self.ref_fifo, "w")
112 for modes in (self.dual_mode, self.interferometer):
114 modecount = modecount + 1
117 print "must select only 1 of --dual_mode, or --interferometer"
120 self.chartneeded = True
122 if (self.setimode == True):
123 self.chartneeded = False
125 if (self.setimode == True and self.interferometer == True):
126 print "can't pick both --setimode and --interferometer"
129 if (self.setimode == True and self.switch_mode == True):
130 print "can't pick both --setimode and --switch_mode"
133 if (self.interferometer == True and self.switch_mode == True):
134 print "can't pick both --interferometer and --switch_mode"
138 self.normal_mode = True
140 self.show_debug_info = True
142 # Pick up waterfall option
143 self.waterfall = options.waterfall
146 self.setimode = options.setimode
148 self.setik = options.setik
149 self.seti_fft_bandwidth = int(options.setibandwidth)
152 binwidth = self.seti_fft_bandwidth / options.fft_size
154 # Use binwidth, and knowledge of likely chirp rates to set reasonable
155 # values for SETI analysis code. We assume that SETI signals will
156 # chirp at somewhere between 0.10Hz/sec and 0.25Hz/sec.
158 # upper_limit is the "worst case"--that is, the case for which we have
159 # to wait the longest to actually see any drift, due to the quantizing
161 upper_limit = binwidth / 0.10
162 self.setitimer = int(upper_limit * 2.00)
165 # Calculate the CHIRP values based on Hz/sec
166 self.CHIRP_LOWER = 0.10 * self.setitimer
167 self.CHIRP_UPPER = 0.25 * self.setitimer
169 # Reset hit counters to 0
171 self.s1hitcounter = 0
172 self.s2hitcounter = 0
174 # We scan through 2Mhz of bandwidth around the chosen center freq
175 self.seti_freq_range = options.seti_range
176 # Calculate lower edge
177 self.setifreq_lower = options.freq - (self.seti_freq_range/2)
178 self.setifreq_current = options.freq
179 # Calculate upper edge
180 self.setifreq_upper = options.freq + (self.seti_freq_range/2)
182 # Maximum "hits" in a line
185 # Number of lines for analysis
188 # We change center frequencies based on nhitlines and setitimer
189 self.setifreq_timer = self.setitimer * (self.nhitlines * 5)
191 # Create actual timer
192 self.seti_then = time.time()
194 # The hits recording array
195 self.hits_array = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
196 self.hit_intensities = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
197 # Calibration coefficient and offset
198 self.calib_coeff = options.calib_coeff
199 self.calib_offset = options.calib_offset
200 if self.calib_offset < -750:
201 self.calib_offset = -750
202 if self.calib_offset > 750:
203 self.calib_offset = 750
205 if self.calib_coeff < 1:
207 if self.calib_coeff > 100:
208 self.calib_coeff = 100
210 self.integ = options.integ
211 self.avg_alpha = options.avg
212 self.gain = options.gain
213 self.decln = options.decln
215 # Set initial values for datalogging timed-output
216 self.continuum_then = time.time()
217 self.spectral_then = time.time()
222 self.subdev = [(0, 0), (0,0)]
225 # If SETI mode, we always run at maximum USRP decimation
230 if (self.dual_mode == False and self.interferometer == False):
231 self.u = usrp.source_c(decim_rate=options.decim)
232 self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
233 # determine the daughterboard subdevice we're using
234 self.subdev[0] = usrp.selected_subdev(self.u, options.rx_subdev_spec)
235 self.subdev[1] = self.subdev[0]
236 self.cardtype = self.subdev[0].dbid()
238 self.u=usrp.source_c(decim_rate=options.decim, nchan=2)
239 self.subdev[0] = usrp.selected_subdev(self.u, (0, 0))
240 self.subdev[1] = usrp.selected_subdev(self.u, (1, 0))
241 self.cardtype = self.subdev[0].dbid()
242 self.u.set_mux(0x32103210)
243 c1 = self.subdev[0].name()
244 c2 = self.subdev[1].name()
246 print "Must have identical cardtypes for --dual_mode or --interferometer"
253 format = self.u.make_format(width, shift)
254 r = self.u.set_format(format)
256 # Set initial declination
257 self.decln = options.decln
259 input_rate = self.u.adc_freq() / self.u.decim_rate()
262 # Set prefix for data files
264 self.prefix = options.prefix
267 # The lower this number, the fewer sample frames are dropped
268 # in computing the FFT. A sampled approach is taken to
269 # computing the FFT of the incoming data, which reduces
270 # sensitivity. Increasing sensitivity inreases CPU loading.
272 self.fft_rate = options.fft_rate
274 self.fft_size = int(options.fft_size)
276 # This buffer is used to remember the most-recent FFT display
277 # values. Used later by self.write_spectral_data() to write
278 # spectral data to datalogging files, and by the SETI analysis
281 self.fft_outbuf = Numeric.zeros(self.fft_size, Numeric.Float64)
284 # If SETI mode, only look at seti_fft_bandwidth
288 self.fft_input_rate = self.seti_fft_bandwidth
291 # Build a decimating bandpass filter
293 self.fft_input_taps = gr.firdes.complex_band_pass (1.0,
295 -(int(self.fft_input_rate/2)), int(self.fft_input_rate/2), 200,
296 gr.firdes.WIN_HAMMING, 0)
299 # Compute required decimation factor
301 decimation = int(input_rate/self.fft_input_rate)
302 self.fft_bandpass = gr.fir_filter_ccc (decimation,
305 self.fft_input_rate = input_rate
308 if self.waterfall == False:
309 self.scope = ra_fftsink.ra_fft_sink_c (panel,
310 fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
311 fft_rate=int(self.fft_rate), title="Spectral",
312 ofunc=self.fft_outfunc, xydfunc=self.xydfunc)
314 self.scope = ra_waterfallsink.waterfall_sink_c (panel,
315 fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
316 fft_rate=int(self.fft_rate), title="Spectral", ofunc=self.fft_outfunc, size=(1100, 600), xydfunc=self.xydfunc, ref_level=0, span=10)
318 # Set up ephemeris data
319 self.locality = ephem.Observer()
320 self.locality.long = str(options.longitude)
321 self.locality.lat = str(options.latitude)
323 # We make notes about Sunset/Sunrise in Continuum log files
324 self.sun = ephem.Sun()
327 # Set up stripchart display
329 if (self.dual_mode != False):
330 tit = "H+V Continuum"
331 if (self.interferometer != False):
332 tit = "East x West Correlation"
333 self.stripsize = int(options.stripsize)
334 if self.chartneeded == True:
335 self.chart = ra_stripchartsink.stripchart_sink_f (panel,
336 stripsize=self.stripsize,
338 xlabel="LMST Offset (Seconds)",
339 scaling=1.0, ylabel=options.ylabel,
340 divbase=options.divbase)
342 # Set center frequency
343 self.centerfreq = options.freq
345 # Set observing frequency (might be different from actual programmed
347 if options.observing == 0.0:
348 self.observing = options.freq
350 self.observing = options.observing
352 # Remember our input bandwidth
357 # The strip chart is fed at a constant 1Hz rate
361 # Call constructors for receive chains
364 if (self.dual_mode == True):
365 self.setup_dual (self.setimode,self.use_notches)
367 if (self.interferometer == True):
368 self.setup_interferometer(self.setimode,self.use_notches)
370 if (self.normal_mode == True):
371 self.setup_normal(self.setimode,self.use_notches)
373 if (self.setimode == True):
376 self._build_gui(vbox)
378 # Make GUI agree with command-line
379 self.integ = options.integ
380 if self.setimode == False:
381 self.myform['integration'].set_value(int(options.integ))
382 self.myform['offset'].set_value(self.calib_offset)
383 self.myform['dcgain'].set_value(self.calib_coeff)
384 self.myform['average'].set_value(int(options.avg))
387 if self.setimode == False:
388 # Make integrator agree with command line
389 self.set_integration(int(options.integ))
391 self.avg_alpha = options.avg
393 # Make spectral averager agree with command line
394 if options.avg != 1.0:
395 self.scope.set_avg_alpha(float(1.0/options.avg))
396 self.scope.set_average(True)
398 if self.setimode == False:
400 self.chart.set_y_per_div(options.division)
401 # Set reference(MAX) level
402 self.chart.set_ref_level(options.reflevel)
406 if options.gain is None:
407 # if no gain was specified, use the mid-point in dB
408 g = self.subdev[0].gain_range()
409 options.gain = float(g[0]+g[1])/2
411 if options.freq is None:
412 # if no freq was specified, use the mid-point
413 r = self.subdev[0].freq_range()
414 options.freq = float(r[0]+r[1])/2
416 # Set the initial gain control
417 self.set_gain(options.gain)
419 if not(self.set_freq(options.freq)):
420 self._set_status_msg("Failed to set initial frequency")
423 self.set_decln (self.decln)
426 # RF hardware information
427 self.myform['decim'].set_value(self.u.decim_rate())
428 self.myform['USB BW'].set_value(self.u.adc_freq() / self.u.decim_rate())
429 if (self.dual_mode == True):
430 self.myform['dbname'].set_value(self.subdev[0].name()+'/'+self.subdev[1].name())
432 self.myform['dbname'].set_value(self.subdev[0].name())
434 # Set analog baseband filtering, if DBS_RX
435 if self.cardtype in (usrp_dbid.DBS_RX, usrp_dbid.DBS_RX_REV_2_1):
436 lbw = (self.u.adc_freq() / self.u.decim_rate()) / 2
439 #self.subdev[0].set_bw(lbw)
440 #self.subdev[1].set_bw(lbw)
442 # Start the timer for the LMST display and datalogging
443 self.lmst_timer.Start(1000)
444 if (self.switch_mode == True):
445 self.other_timer.Start(330)
448 def _set_status_msg(self, msg):
449 self.frame.GetStatusBar().SetStatusText(msg, 0)
451 def _build_gui(self, vbox):
453 def _form_set_freq(kv):
454 # Adjust current SETI frequency, and limits
455 self.setifreq_lower = kv['freq'] - (self.seti_freq_range/2)
456 self.setifreq_current = kv['freq']
457 self.setifreq_upper = kv['freq'] + (self.seti_freq_range/2)
459 # Reset SETI analysis timer
460 self.seti_then = time.time()
461 # Zero-out hits array when changing frequency
462 self.hits_array[:,:] = 0.0
463 self.hit_intensities[:,:] = -60.0
465 return self.set_freq(kv['freq'])
467 def _form_set_decln(kv):
468 return self.set_decln(kv['decln'])
470 # Position the FFT display
471 vbox.Add(self.scope.win, 15, wx.EXPAND)
473 if self.setimode == False:
474 # Position the Total-power stripchart
475 vbox.Add(self.chart.win, 15, wx.EXPAND)
477 # add control area at the bottom
478 self.myform = myform = form.form()
479 hbox = wx.BoxSizer(wx.HORIZONTAL)
480 hbox.Add((7,0), 0, wx.EXPAND)
481 vbox1 = wx.BoxSizer(wx.VERTICAL)
482 myform['freq'] = form.float_field(
483 parent=self.panel, sizer=vbox1, label="Center freq", weight=1,
484 callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
486 vbox1.Add((4,0), 0, 0)
488 myform['lmst_high'] = form.static_text_field(
489 parent=self.panel, sizer=vbox1, label="Current LMST", weight=1)
490 vbox1.Add((4,0), 0, 0)
492 if self.setimode == False:
493 myform['spec_data'] = form.static_text_field(
494 parent=self.panel, sizer=vbox1, label="Spectral Cursor", weight=1)
495 vbox1.Add((4,0), 0, 0)
497 vbox2 = wx.BoxSizer(wx.VERTICAL)
498 if self.setimode == False:
499 vbox3 = wx.BoxSizer(wx.VERTICAL)
500 g = self.subdev[0].gain_range()
501 myform['gain'] = form.slider_field(parent=self.panel, sizer=vbox2, label="RF Gain",
503 min=int(g[0]), max=int(g[1]),
504 callback=self.set_gain)
506 vbox2.Add((4,0), 0, 0)
507 if self.setimode == True:
511 myform['average'] = form.slider_field(parent=self.panel, sizer=vbox2,
512 label="Spectral Averaging (FFT frames)", weight=1, min=1, max=max_savg, callback=self.set_averaging)
514 # Set up scan control button when in SETI mode
515 if (self.setimode == True):
516 # SETI scanning control
517 buttonbox = wx.BoxSizer(wx.HORIZONTAL)
518 self.scan_control = form.button_with_callback(self.panel,
520 callback=self.toggle_scanning)
522 buttonbox.Add(self.scan_control, 0, wx.CENTER)
523 vbox2.Add(buttonbox, 0, wx.CENTER)
525 vbox2.Add((4,0), 0, 0)
527 if self.setimode == False:
528 myform['integration'] = form.slider_field(parent=self.panel, sizer=vbox2,
529 label="Continuum Integration Time (sec)", weight=1, min=1, max=180, callback=self.set_integration)
531 vbox2.Add((4,0), 0, 0)
533 myform['decln'] = form.float_field(
534 parent=self.panel, sizer=vbox2, label="Current Declination", weight=1,
535 callback=myform.check_input_and_call(_form_set_decln))
536 vbox2.Add((4,0), 0, 0)
538 if self.setimode == False:
539 myform['offset'] = form.slider_field(parent=self.panel, sizer=vbox3,
540 label="Post-Detector Offset", weight=1, min=-750, max=750,
541 callback=self.set_pd_offset)
542 vbox3.Add((2,0), 0, 0)
543 myform['dcgain'] = form.slider_field(parent=self.panel, sizer=vbox3,
544 label="Post-Detector Gain", weight=1, min=1, max=100,
545 callback=self.set_pd_gain)
546 vbox3.Add((2,0), 0, 0)
547 hbox.Add(vbox1, 0, 0)
548 hbox.Add(vbox2, wx.ALIGN_RIGHT, 0)
550 if self.setimode == False:
551 hbox.Add(vbox3, wx.ALIGN_RIGHT, 0)
553 vbox.Add(hbox, 0, wx.EXPAND)
555 self._build_subpanel(vbox)
557 self.lmst_timer = wx.PyTimer(self.lmst_timeout)
558 self.other_timer = wx.PyTimer(self.other_timeout)
561 def _build_subpanel(self, vbox_arg):
562 # build a secondary information panel (sometimes hidden)
564 # FIXME figure out how to have this be a subpanel that is always
565 # created, but has its visibility controlled by foo.Show(True/False)
567 if not(self.show_debug_info):
574 #panel = wx.Panel(self.panel, -1)
575 #vbox = wx.BoxSizer(wx.VERTICAL)
577 hbox = wx.BoxSizer(wx.HORIZONTAL)
579 myform['decim'] = form.static_float_field(
580 parent=panel, sizer=hbox, label="Decim")
583 myform['USB BW'] = form.static_float_field(
584 parent=panel, sizer=hbox, label="USB BW")
587 myform['dbname'] = form.static_text_field(
588 parent=panel, sizer=hbox)
591 myform['baseband'] = form.static_float_field(
592 parent=panel, sizer=hbox, label="Analog BB")
595 myform['ddc'] = form.static_float_field(
596 parent=panel, sizer=hbox, label="DDC")
599 vbox.Add(hbox, 0, wx.EXPAND)
603 def set_freq(self, target_freq):
605 Set the center frequency we're interested in.
607 @param target_freq: frequency in Hz
610 Tuning is a two step process. First we ask the front-end to
611 tune as close to the desired frequency as it can. Then we use
612 the result of that operation and our target_frequency to
613 determine the value for the digital down converter.
616 # Everything except BASIC_RX should support usrp.tune()
618 if not (self.cardtype == usrp_dbid.BASIC_RX):
619 r = usrp.tune(self.u, self.subdev[0].which(), self.subdev[0], target_freq)
620 r = usrp.tune(self.u, self.subdev[1].which(), self.subdev[1], target_freq)
622 r = self.u.set_rx_freq(0, target_freq)
623 f = self.u.rx_freq(0)
624 if abs(f-target_freq) > 2.0e3:
627 self.myform['freq'].set_value(target_freq) # update displayed value
629 # Make sure calibrator knows our target freq
632 # Remember centerfreq---used for doppler calcs
633 delta = self.centerfreq - target_freq
634 self.centerfreq = target_freq
635 self.observing -= delta
636 self.scope.set_baseband_freq (self.observing)
638 self.myform['baseband'].set_value(r.baseband_freq)
639 self.myform['ddc'].set_value(r.dxc_freq)
641 if (self.use_notches):
642 self.compute_notch_taps(self.notches)
643 if self.dual_mode == False and self.interferometer == False:
644 self.notch_filt.set_taps(self.notch_taps)
646 self.notch_filt1.set_taps(self.notch_taps)
647 self.notch_filt2.set_taps(self.notch_taps)
653 def set_decln(self, dec):
655 self.myform['decln'].set_value(dec) # update displayed value
657 def set_gain(self, gain):
658 self.myform['gain'].set_value(gain) # update displayed value
659 self.subdev[0].set_gain(gain)
660 self.subdev[1].set_gain(gain)
663 def set_averaging(self, avval):
664 self.myform['average'].set_value(avval)
665 self.scope.set_avg_alpha(1.0/(avval))
666 self.scope.set_average(True)
667 self.avg_alpha = avval
669 def set_integration(self, integval):
670 if self.setimode == False:
671 self.integrator.set_taps(1.0/((integval)*(self.bw/2)))
672 self.myform['integration'].set_value(integval)
673 self.integ = integval
677 # Used to update LMST display, as well as current
680 # We also write external data-logging files here
682 def lmst_timeout(self):
683 self.locality.date = ephem.now()
684 if self.setimode == False:
685 x = self.probe.level()
686 sidtime = self.locality.sidereal_time()
688 s = str(ephem.hours(sidtime)) + " " + self.sunstate
689 # Continuum detector value
690 if self.setimode == False:
692 s = s + "\nDet: " + str(sx)
694 sx = "%2d" % self.hitcounter
695 s1 = "%2d" % self.s1hitcounter
696 s2 = "%2d" % self.s2hitcounter
697 sa = "%4.2f" % self.avgdelta
698 sy = "%3.1f-%3.1f" % (self.CHIRP_LOWER, self.CHIRP_UPPER)
699 s = s + "\nHits: " + str(sx) + "\nS1:" + str(s1) + " S2:" + str(s2)
700 s = s + "\nAv D: " + str(sa) + "\nCh lim: " + str(sy)
702 self.myform['lmst_high'].set_value(s)
705 # Write data out to recording files
707 if self.setimode == False:
708 self.write_continuum_data(x,sidtime)
709 self.write_spectral_data(self.fft_outbuf,sidtime)
712 self.seti_analysis(self.fft_outbuf,sidtime)
714 if ((self.scanning == True) and ((now - self.seti_then) > self.setifreq_timer)):
716 self.setifreq_current = self.setifreq_current + self.fft_input_rate
717 if (self.setifreq_current > self.setifreq_upper):
718 self.setifreq_current = self.setifreq_lower
719 self.set_freq(self.setifreq_current)
720 # Make sure we zero-out the hits array when changing
722 self.hits_array[:,:] = 0.0
723 self.hit_intensities[:,:] = 0.0
725 def other_timeout(self):
726 if (self.switch_state == 0):
727 self.switch_state = 1
729 elif (self.switch_state == 1):
730 self.switch_state = 0
732 if (self.switch_state == 0):
734 self.cmute.set_n(int(1.0e9))
736 elif (self.switch_state == 1):
737 self.mute.set_n(int(1.0e9))
740 if (self.ref_fifo != "@@@@"):
741 self.ref_fifo_file.write(str(self.switch_state)+"\n")
742 self.ref_fifo_file.flush()
744 self.avg_reference_value = self.cprobe.level()
747 # Set reference value
749 self.reference_level.set_k(-1.0 * (self.avg_reference_value/self.reference_divisor))
751 def fft_outfunc(self,data,l):
754 def write_continuum_data(self,data,sidtime):
756 # Create localtime structure for producing filename
757 foo = time.localtime()
759 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
760 foo.tm_mon, foo.tm_mday, foo.tm_hour)
762 # Open the data file, appending
763 continuum_file = open (filenamestr+".tpdat","a")
777 # If time to write full header info (saves storage this way)
779 if (now - self.continuum_then > 20):
780 self.sun.compute(self.locality)
782 sunset = self.locality.next_setting(self.sun)
783 sunrise = self.locality.next_rising(self.sun)
786 if ((sunrise < enow) and (enow < sunset)):
789 self.continuum_then = now
791 continuum_file.write(str(ephem.hours(sidtime))+" "+flt+" Dn="+str(inter)+",")
792 continuum_file.write("Ti="+str(integ)+",Fc="+str(fc)+",Bw="+str(bw))
793 continuum_file.write(",Ga="+str(ga)+",Sun="+str(sun_insky)+"\n")
795 continuum_file.write(str(ephem.hours(sidtime))+" "+flt+"\n")
797 continuum_file.close()
800 def write_spectral_data(self,data,sidtime):
805 # If time to write out spectral data
806 # We don't write this out every time, in order to
807 # save disk space. Since the spectral data are
808 # typically heavily averaged, writing this data
809 # "once in a while" is OK.
811 if (now - self.spectral_then >= delta):
812 self.spectral_then = now
814 # Get localtime structure to make filename from
815 foo = time.localtime()
818 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
819 foo.tm_mon, foo.tm_mday, foo.tm_hour)
822 spectral_file = open (filenamestr+".sdat","a")
824 # Setup data fields to be written
834 spectral_file.write("data:"+str(ephem.hours(sidtime))+" Dn="+str(inter)+",Fc="+str(fc)+",Bw="+str(bw)+",Av="+str(av))
835 spectral_file.write (" [ ")
837 spectral_file.write(" "+str(r))
839 spectral_file.write(" ]\n")
840 spectral_file.close()
845 def seti_analysis(self,fftbuf,sidtime):
850 if self.seticounter < self.setitimer:
851 self.seticounter = self.seticounter + 1
856 # Run through FFT output buffer, computing standard deviation (Sigma)
858 # First compute average
860 avg = avg + fftbuf[i]
864 # Then compute standard deviation (Sigma)
867 sigma = sigma + (d*d)
869 sigma = Numeric.sqrt(sigma/l)
872 # Snarfle through the FFT output buffer again, looking for
873 # outlying data points
875 start_f = self.observing - (self.fft_input_rate/2)
878 f_incr = self.fft_input_rate / l
882 for i in range(l/2,l):
884 # If current FFT buffer has an item that exceeds the specified
887 if ((fftbuf[i] - avg) > (self.setik * sigma)):
888 hits.append(current_f)
889 hit_intensities.append(fftbuf[i])
890 current_f = current_f + f_incr
893 for i in range(0,l/2):
895 # If current FFT buffer has an item that exceeds the specified
898 if ((fftbuf[i] - avg) > (self.setik * sigma)):
899 hits.append(current_f)
900 hit_intensities.append(fftbuf[i])
901 current_f = current_f + f_incr
909 # OK, so we have some hits in the FFT buffer
910 # They'll have a rather substantial gauntlet to run before
911 # being declared a real "hit"
915 self.s1hitcounter = self.s1hitcounter + len(hits)
917 # Weed out buffers with an excessive number of
918 # signals above Sigma
919 if (len(hits) > self.nhits):
923 # Weed out FFT buffers with apparent multiple narrowband signals
924 # separated significantly in frequency. This means that a
925 # single signal spanning multiple bins is OK, but a buffer that
926 # has multiple, apparently-separate, signals isn't OK.
930 for i in range(1,len(hits)):
931 if ((hits[i] - last) > (f_incr*3.0)):
936 self.s2hitcounter = self.s2hitcounter + ns2
939 # Run through all available hit buffers, computing difference between
940 # frequencies found there, if they're all within the chirp limits
944 f_ds = Numeric.zeros(self.nhitlines, Numeric.Float64)
947 for i in range(0,min(len(hits),len(self.hits_array[:,0]))):
948 f_ds[0] = abs(self.hits_array[i,0] - hits[i])
949 for j in range(1,len(f_ds)):
950 f_ds[j] = abs(self.hits_array[i,j] - self.hits_array[i,0])
951 avg_delta = avg_delta + f_ds[j]
954 if (self.seti_isahit (f_ds)):
956 self.hitcounter = self.hitcounter + 1
959 if (avg_delta/k < (self.seti_fft_bandwidth/2)):
960 self.avgdelta = avg_delta / k
962 # Save 'n shuffle hits
963 # Old hit buffers percolate through the hit buffers
964 # (there are self.nhitlines of these buffers)
965 # and then drop off the end
966 # A consequence is that while the nhitlines buffers are filling,
967 # you can get some absurd values for self.avgdelta, because some
968 # of the buffers are full of zeros
969 for i in range(self.nhitlines,1):
970 self.hits_array[:,i] = self.hits_array[:,i-1]
971 self.hit_intensities[:,i] = self.hit_intensities[:,i-1]
973 for i in range(0,len(hits)):
974 self.hits_array[i,0] = hits[i]
975 self.hit_intensities[i,0] = hit_intensities[i]
977 # Finally, write the hits/intensities buffer
979 self.write_hits(sidtime)
983 def seti_isahit(self,fdiffs):
986 for i in range(0,len(fdiffs)):
987 if (fdiffs[i] >= self.CHIRP_LOWER and fdiffs[i] <= self.CHIRP_UPPER):
988 truecount = truecount + 1
990 if truecount == len(fdiffs):
995 def write_hits(self,sidtime):
996 # Create localtime structure for producing filename
997 foo = time.localtime()
999 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
1000 foo.tm_mon, foo.tm_mday, foo.tm_hour)
1002 # Open the data file, appending
1003 hits_file = open (filenamestr+".seti","a")
1005 # Write sidtime first
1006 hits_file.write(str(ephem.hours(sidtime))+" "+str(self.decln)+" ")
1009 # Then write the hits/hit intensities buffers with enough
1010 # "syntax" to allow parsing by external (not yet written!)
1013 for i in range(0,self.nhitlines):
1014 hits_file.write(" ")
1015 for j in range(0,self.nhits):
1016 hits_file.write(str(self.hits_array[j,i])+":")
1017 hits_file.write(str(self.hit_intensities[j,i])+",")
1018 hits_file.write("\n")
1022 def xydfunc(self,func,xyv):
1023 if self.setimode == True:
1025 magn = int(Numeric.log10(self.observing))
1026 if (magn == 6 or magn == 7 or magn == 8):
1028 dfreq = xyv[0] * pow(10.0,magn)
1030 ratio = self.observing / dfreq
1039 s = "%.6f%s\n%.3fdB" % (xyv[0], xhz, xyv[1])
1040 s2 = "\n%.3fkm/s" % vs
1041 self.myform['spec_data'].set_value(s+s2)
1043 tmpnotches = Numeric.zeros(self.NOTCH_TAPS,Numeric.Float64)
1045 if self.use_notches == True:
1046 for i in range(0,len(self.notches)):
1047 if abs(self.notches[i] - dfreq) <= (self.bw/self.NOTCH_TAPS):
1051 for i in range(0,len(self.notches)):
1053 tmpnotches[j] = self.notches[i]
1056 for i in range(0,len(tmpnotches)):
1057 if (int(tmpnotches[i]) == 0):
1058 tmpnotches[i] = dfreq
1060 self.notches = tmpnotches
1061 self.compute_notch_taps(self.notches)
1062 if self.dual_mode == False and self.interferometer == False:
1063 self.notch_filt.set_taps(self.notch_taps)
1065 self.notch_filt1.set_taps(self.notch_taps)
1066 self.notch_filt2.set_taps(self.notch_taps)
1068 def xydfunc_waterfall(self,pos):
1069 lower = self.observing - (self.seti_fft_bandwidth / 2)
1070 upper = self.observing + (self.seti_fft_bandwidth / 2)
1071 binwidth = self.seti_fft_bandwidth / 1024
1072 s = "%.6fMHz" % ((lower + (pos.x*binwidth)) / 1.0e6)
1073 self.myform['spec_data'].set_value(s)
1075 def toggle_cal(self):
1076 if (self.calstate == True):
1077 self.calstate = False
1078 self.u.write_io(0,0,(1<<15))
1079 self.calibrator.SetLabel("Calibration Source: Off")
1081 self.calstate = True
1082 self.u.write_io(0,(1<<15),(1<<15))
1083 self.calibrator.SetLabel("Calibration Source: On")
1085 def toggle_annotation(self):
1086 if (self.annotate_state == True):
1087 self.annotate_state = False
1088 self.annotation.SetLabel("Annotation: Off")
1090 self.annotate_state = True
1091 self.annotation.SetLabel("Annotation: On")
1093 # Turn scanning on/off
1094 # Called-back by "Recording" button
1096 def toggle_scanning(self):
1097 # Current scanning? Flip state
1098 if (self.scanning == True):
1099 self.scanning = False
1100 self.scan_control.SetLabel("Scan: Off")
1103 self.scanning = True
1104 self.scan_control.SetLabel("Scan: On ")
1106 def set_pd_offset(self,offs):
1107 self.myform['offset'].set_value(offs)
1108 self.calib_offset=offs
1109 x = self.calib_coeff / 100.0
1110 self.cal_offs.set_k(offs*(x*8000))
1112 def set_pd_gain(self,gain):
1113 self.myform['dcgain'].set_value(gain)
1114 self.cal_mult.set_k(gain*0.01)
1115 self.calib_coeff = gain
1117 self.cal_offs.set_k(self.calib_offset*(x*8000))
1119 def compute_notch_taps(self,notchlist):
1120 tmptaps = Numeric.zeros(self.NOTCH_TAPS,Numeric.Complex64)
1121 binwidth = self.bw / self.NOTCH_TAPS
1123 for i in range(0,self.NOTCH_TAPS):
1124 tmptaps[i] = complex(1.0,0.0)
1127 diff = i - self.observing
1131 idx = diff / binwidth
1134 if (idx < 0 or idx > (self.NOTCH_TAPS/2)):
1136 tmptaps[idx] = complex(0.0, 0.0)
1139 idx = -diff / binwidth
1141 idx = (self.NOTCH_TAPS/2) - idx
1142 idx = int(idx+(self.NOTCH_TAPS/2))
1143 if (idx < 0 or idx > (self.NOTCH_TAPS)):
1145 tmptaps[idx] = complex(0.0, 0.0)
1147 self.notch_taps = numpy.fft.ifft(tmptaps)
1150 # Setup common pieces of radiometer mode
1152 def setup_radiometer_common(self,n):
1153 # The IIR integration filter for post-detection
1154 self.integrator = gr.single_pole_iir_filter_ff(1.0)
1155 self.integrator.set_taps (1.0/self.bw)
1157 if (self.use_notches == True):
1158 self.compute_notch_taps(self.notches)
1160 self.notch_filt1 = gr.fft_filter_ccc(1, self.notch_taps)
1161 self.notch_filt2 = gr.fft_filter_ccc(1, self.notch_taps)
1163 self.notch_filt = gr.fft_filter_ccc(1, self.notch_taps)
1167 self.probe = gr.probe_signal_f()
1170 # Continuum calibration stuff
1172 x = self.calib_coeff/100.0
1173 self.cal_mult = gr.multiply_const_ff(self.calib_coeff/100.0)
1174 self.cal_offs = gr.add_const_ff(self.calib_offset*(x*8000))
1177 # Mega decimator after IIR filter
1179 if (self.switch_mode == False):
1180 self.keepn = gr.keep_one_in_n(gr.sizeof_float, self.bw)
1182 self.keepn = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/2))
1185 # For the Dicke-switching scheme
1187 #self.switch = gr.multiply_const_ff(1.0)
1190 if (self.switch_mode == True):
1191 self.vector = gr.vector_sink_f()
1192 self.swkeep = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/3))
1193 self.mute = gr.keep_one_in_n(gr.sizeof_float, 1)
1194 self.cmute = gr.keep_one_in_n(gr.sizeof_float, int(1.0e9))
1195 self.cintegrator = gr.single_pole_iir_filter_ff(1.0/(self.bw/2))
1196 self.cprobe = gr.probe_signal_f()
1198 self.mute = gr.multiply_const_ff(1.0)
1201 self.avg_reference_value = 0.0
1202 self.reference_level = gr.add_const_ff(0.0)
1205 # Setup ordinary single-channel radiometer mode
1207 def setup_normal(self, setimode):
1209 self.setup_radiometer_common(1)
1212 if (self.use_notches == True):
1213 self.shead = self.notch_filt
1217 if setimode == False:
1219 self.detector = gr.complex_to_mag_squared()
1220 self.connect(self.shead, self.scope)
1222 if (self.use_notches == False):
1223 self.connect(self.head, self.detector, self.mute, self.reference_level,
1224 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1226 self.connect(self.head, self.notch_filt, self.detector, self.mute, self.reference_level,
1227 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1229 self.connect(self.cal_offs, self.probe)
1232 # Add a side-chain detector chain, with a different integrator, for sampling
1233 # The reference channel data
1234 # This is used to derive the offset value for self.reference_level, used above
1236 if (self.switch_mode == True):
1237 self.connect(self.detector, self.cmute, self.cintegrator, self.swkeep, self.cprobe)
1242 # Setup dual-channel (two antenna, usual orthogonal polarity probes in the same waveguide)
1244 def setup_dual(self, setimode,notches):
1246 self.setup_radiometer_common(2)
1248 self.di = gr.deinterleave(gr.sizeof_gr_complex)
1249 self.addchans = gr.add_cc ()
1250 self.detector = gr.add_ff ()
1251 self.h_power = gr.complex_to_mag_squared()
1252 self.v_power = gr.complex_to_mag_squared()
1253 self.connect (self.u, self.di)
1255 if (self.use_notches == True):
1256 self.connect((self.di, 0), self.notch_filt1, (self.addchans, 0))
1257 self.connect((self.di, 1), self.notch_filt2, (self.addchans, 1))
1260 # For spectral, adding the two channels works, assuming no gross
1261 # phase or amplitude error
1262 self.connect ((self.di, 0), (self.addchans, 0))
1263 self.connect ((self.di, 1), (self.addchans, 1))
1266 # Connect heads of spectral and total-power chains
1268 if (self.use_notches == False):
1271 self.head = (self.notch_filt1, self.notch_filt2)
1273 self.shead = self.addchans
1275 if (setimode == False):
1277 # For dual-polarization mode, we compute the sum of the
1278 # powers on each channel, after they've been detected
1280 self.detector = gr.add_ff()
1283 # In dual-polarization mode, we compute things a little differently
1284 # In effect, we have two radiometer chains, terminating in an adder
1286 if self.use_notches == True:
1287 self.connect(self.notch_filt1, self.h_power)
1288 self.connect(self.notch_filt2, self.v_power)
1290 self.connect((self.head, 0), self.h_power)
1291 self.connect((self.head, 1), self.v_power)
1292 self.connect(self.h_power, (self.detector, 0))
1293 self.connect(self.v_power, (self.detector, 1))
1294 self.connect(self.detector, self.mute, self.reference_level,
1295 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1296 self.connect(self.cal_offs, self.probe)
1297 self.connect(self.shead, self.scope)
1300 # Add a side-chain detector chain, with a different integrator, for sampling
1301 # The reference channel data
1302 # This is used to derive the offset value for self.reference_level, used above
1304 if (self.switch_mode == True):
1305 self.connect(self.detector, self.cmute, self.cintegrator, self.swkeep, self.cprobe)
1309 # Setup correlating interferometer mode
1311 def setup_interferometer(self, setimode):
1312 self.setup_radiometer_common(2)
1314 self.di = gr.deinterleave(gr.sizeof_gr_complex)
1315 self.connect (self.u, self.di)
1316 self.corr = gr.multiply_cc()
1317 self.c2f = gr.complex_to_float()
1319 self.shead = (self.di, 0)
1321 # Channel 0 to multiply port 0
1322 # Channel 1 to multiply port 1
1323 if (self.use_notches == False):
1324 self.connect((self.di, 0), (self.corr, 0))
1325 self.connect((self.di, 1), (self.corr, 1))
1327 self.connect((self.di, 0), self.notch_filt1, (self.corr, 0))
1328 self.connect((self.di, 1), self.notch_filt2, (self.corr, 0))
1331 # Multiplier (correlator) to complex-to-float, followed by integrator, etc
1333 self.connect(self.corr, self.c2f, self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1336 # FFT scope gets only 1 channel
1337 # FIX THIS, by cross-correlating the *outputs* of two different FFTs, then display
1340 self.connect(self.shead, self.scope)
1343 # Output of correlator/integrator chain to probe
1345 self.connect(self.cal_offs, self.probe)
1352 def setup_seti(self):
1353 self.connect (self.shead, self.fft_bandpass, self.scope)
1359 app = stdgui2.stdapp(app_flow_graph, "RADIO ASTRONOMY SPECTRAL/CONTINUUM RECEIVER: $Revision$", nstatus=1)
1362 if __name__ == '__main__':