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("-k", "--notch_taps", type="int", default=64, help="Number of notch taps")
86 parser.add_option("-n", "--notches", action="store_true",
87 default=False, help="Notch frequencies after all other args")
88 (options, args) = parser.parse_args()
90 self.setimode = options.setimode
91 self.dual_mode = options.dual_mode
92 self.interferometer = options.interferometer
93 self.normal_mode = False
94 self.switch_mode = options.switch_mode
96 self.reference_divisor = options.reference_divisor
97 self.ref_fifo = options.ref_fifo
99 self.NOTCH_TAPS = options.notch_taps
100 self.notches = Numeric.zeros(self.NOTCH_TAPS,Numeric.Float64)
101 # Get notch locations
104 self.notches[j] = float(i)
107 self.use_notches = options.notches
109 if (self.ref_fifo != "@@@@"):
110 self.ref_fifo_file = open (self.ref_fifo, "w")
113 for modes in (self.dual_mode, self.interferometer):
115 modecount = modecount + 1
118 print "must select only 1 of --dual_mode, or --interferometer"
121 self.chartneeded = True
123 if (self.setimode == True):
124 self.chartneeded = False
126 if (self.setimode == True and self.interferometer == True):
127 print "can't pick both --setimode and --interferometer"
130 if (self.setimode == True and self.switch_mode == True):
131 print "can't pick both --setimode and --switch_mode"
134 if (self.interferometer == True and self.switch_mode == True):
135 print "can't pick both --interferometer and --switch_mode"
139 self.normal_mode = True
141 self.show_debug_info = True
143 # Pick up waterfall option
144 self.waterfall = options.waterfall
147 self.setimode = options.setimode
149 self.setik = options.setik
150 self.seti_fft_bandwidth = int(options.setibandwidth)
153 binwidth = self.seti_fft_bandwidth / options.fft_size
155 # Use binwidth, and knowledge of likely chirp rates to set reasonable
156 # values for SETI analysis code. We assume that SETI signals will
157 # chirp at somewhere between 0.10Hz/sec and 0.25Hz/sec.
159 # upper_limit is the "worst case"--that is, the case for which we have
160 # to wait the longest to actually see any drift, due to the quantizing
162 upper_limit = binwidth / 0.10
163 self.setitimer = int(upper_limit * 2.00)
166 # Calculate the CHIRP values based on Hz/sec
167 self.CHIRP_LOWER = 0.10 * self.setitimer
168 self.CHIRP_UPPER = 0.25 * self.setitimer
170 # Reset hit counters to 0
172 self.s1hitcounter = 0
173 self.s2hitcounter = 0
175 # We scan through 2Mhz of bandwidth around the chosen center freq
176 self.seti_freq_range = options.seti_range
177 # Calculate lower edge
178 self.setifreq_lower = options.freq - (self.seti_freq_range/2)
179 self.setifreq_current = options.freq
180 # Calculate upper edge
181 self.setifreq_upper = options.freq + (self.seti_freq_range/2)
183 # Maximum "hits" in a line
186 # Number of lines for analysis
189 # We change center frequencies based on nhitlines and setitimer
190 self.setifreq_timer = self.setitimer * (self.nhitlines * 5)
192 # Create actual timer
193 self.seti_then = time.time()
195 # The hits recording array
196 self.hits_array = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
197 self.hit_intensities = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
198 # Calibration coefficient and offset
199 self.calib_coeff = options.calib_coeff
200 self.calib_offset = options.calib_offset
201 if self.calib_offset < -750:
202 self.calib_offset = -750
203 if self.calib_offset > 750:
204 self.calib_offset = 750
206 if self.calib_coeff < 1:
208 if self.calib_coeff > 100:
209 self.calib_coeff = 100
211 self.integ = options.integ
212 self.avg_alpha = options.avg
213 self.gain = options.gain
214 self.decln = options.decln
216 # Set initial values for datalogging timed-output
217 self.continuum_then = time.time()
218 self.spectral_then = time.time()
223 self.subdev = [(0, 0), (0,0)]
226 # If SETI mode, we always run at maximum USRP decimation
231 if (self.dual_mode == True and self.decim <= 4):
232 print "Cannot use decim <= 4 with dual_mode"
235 if (self.dual_mode == False and self.interferometer == False):
236 if (options.decim > 4):
237 self.u = usrp.source_c(decim_rate=options.decim,fusb_block_size=8192)
239 self.u = usrp.source_c(decim_rate=options.decim,fusb_block_size=8192, fpga_filename="std_4rx_0tx.rbf")
240 self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
241 # determine the daughterboard subdevice we're using
242 self.subdev[0] = usrp.selected_subdev(self.u, options.rx_subdev_spec)
243 self.subdev[1] = self.subdev[0]
244 self.cardtype = self.subdev[0].dbid()
246 self.u=usrp.source_c(decim_rate=options.decim, nchan=2,fusb_block_size=8192)
247 self.subdev[0] = usrp.selected_subdev(self.u, (0, 0))
248 self.subdev[1] = usrp.selected_subdev(self.u, (1, 0))
249 self.cardtype = self.subdev[0].dbid()
250 self.u.set_mux(0x32103210)
251 c1 = self.subdev[0].name()
252 c2 = self.subdev[1].name()
254 print "Must have identical cardtypes for --dual_mode or --interferometer"
261 format = self.u.make_format(width, shift)
262 r = self.u.set_format(format)
264 # Set initial declination
265 self.decln = options.decln
267 input_rate = self.u.adc_freq() / self.u.decim_rate()
270 # Set prefix for data files
272 self.prefix = options.prefix
275 # The lower this number, the fewer sample frames are dropped
276 # in computing the FFT. A sampled approach is taken to
277 # computing the FFT of the incoming data, which reduces
278 # sensitivity. Increasing sensitivity inreases CPU loading.
280 self.fft_rate = options.fft_rate
282 self.fft_size = int(options.fft_size)
284 # This buffer is used to remember the most-recent FFT display
285 # values. Used later by self.write_spectral_data() to write
286 # spectral data to datalogging files, and by the SETI analysis
289 self.fft_outbuf = Numeric.zeros(self.fft_size, Numeric.Float64)
292 # If SETI mode, only look at seti_fft_bandwidth
296 self.fft_input_rate = self.seti_fft_bandwidth
299 # Build a decimating bandpass filter
301 self.fft_input_taps = gr.firdes.complex_band_pass (1.0,
303 -(int(self.fft_input_rate/2)), int(self.fft_input_rate/2), 200,
304 gr.firdes.WIN_HAMMING, 0)
307 # Compute required decimation factor
309 decimation = int(input_rate/self.fft_input_rate)
310 self.fft_bandpass = gr.fir_filter_ccc (decimation,
313 self.fft_input_rate = input_rate
316 if self.waterfall == False:
317 self.scope = ra_fftsink.ra_fft_sink_c (panel,
318 fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
319 fft_rate=int(self.fft_rate), title="Spectral",
320 ofunc=self.fft_outfunc, xydfunc=self.xydfunc)
322 self.scope = ra_waterfallsink.waterfall_sink_c (panel,
323 fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
324 fft_rate=int(self.fft_rate), title="Spectral", ofunc=self.fft_outfunc, size=(1100, 600), xydfunc=self.xydfunc, ref_level=0, span=10)
326 # Set up ephemeris data
327 self.locality = ephem.Observer()
328 self.locality.long = str(options.longitude)
329 self.locality.lat = str(options.latitude)
331 # We make notes about Sunset/Sunrise in Continuum log files
332 self.sun = ephem.Sun()
335 # Set up stripchart display
337 if (self.dual_mode != False):
338 tit = "H+V Continuum"
339 if (self.interferometer != False):
340 tit = "East x West Correlation"
341 self.stripsize = int(options.stripsize)
342 if self.chartneeded == True:
343 self.chart = ra_stripchartsink.stripchart_sink_f (panel,
344 stripsize=self.stripsize,
346 xlabel="LMST Offset (Seconds)",
347 scaling=1.0, ylabel=options.ylabel,
348 divbase=options.divbase)
350 # Set center frequency
351 self.centerfreq = options.freq
353 # Set observing frequency (might be different from actual programmed
355 if options.observing == 0.0:
356 self.observing = options.freq
358 self.observing = options.observing
360 # Remember our input bandwidth
365 # The strip chart is fed at a constant 1Hz rate
369 # Call constructors for receive chains
372 if (self.dual_mode == True):
373 self.setup_dual (self.setimode)
375 if (self.interferometer == True):
376 self.setup_interferometer(self.setimode)
378 if (self.normal_mode == True):
379 self.setup_normal(self.setimode)
381 if (self.setimode == True):
384 self._build_gui(vbox)
386 # Make GUI agree with command-line
387 self.integ = options.integ
388 if self.setimode == False:
389 self.myform['integration'].set_value(int(options.integ))
390 self.myform['offset'].set_value(self.calib_offset)
391 self.myform['dcgain'].set_value(self.calib_coeff)
392 self.myform['average'].set_value(int(options.avg))
395 if self.setimode == False:
396 # Make integrator agree with command line
397 self.set_integration(int(options.integ))
399 self.avg_alpha = options.avg
401 # Make spectral averager agree with command line
402 if options.avg != 1.0:
403 self.scope.set_avg_alpha(float(1.0/options.avg))
404 self.scope.set_average(True)
406 if self.setimode == False:
408 self.chart.set_y_per_div(options.division)
409 # Set reference(MAX) level
410 self.chart.set_ref_level(options.reflevel)
414 if options.gain is None:
415 # if no gain was specified, use the mid-point in dB
416 g = self.subdev[0].gain_range()
417 options.gain = float(g[0]+g[1])/2
419 if options.freq is None:
420 # if no freq was specified, use the mid-point
421 r = self.subdev[0].freq_range()
422 options.freq = float(r[0]+r[1])/2
424 # Set the initial gain control
425 self.set_gain(options.gain)
427 if not(self.set_freq(options.freq)):
428 self._set_status_msg("Failed to set initial frequency")
431 self.set_decln (self.decln)
434 # RF hardware information
435 self.myform['decim'].set_value(self.u.decim_rate())
436 self.myform['USB BW'].set_value(self.u.adc_freq() / self.u.decim_rate())
437 if (self.dual_mode == True):
438 self.myform['dbname'].set_value(self.subdev[0].name()+'/'+self.subdev[1].name())
440 self.myform['dbname'].set_value(self.subdev[0].name())
442 # Set analog baseband filtering, if DBS_RX
443 if self.cardtype in (usrp_dbid.DBS_RX, usrp_dbid.DBS_RX_REV_2_1):
444 lbw = (self.u.adc_freq() / self.u.decim_rate()) / 2
447 self.subdev[0].set_bw(lbw)
448 self.subdev[1].set_bw(lbw)
450 # Start the timer for the LMST display and datalogging
451 self.lmst_timer.Start(1000)
452 if (self.switch_mode == True):
453 self.other_timer.Start(330)
456 def _set_status_msg(self, msg):
457 self.frame.GetStatusBar().SetStatusText(msg, 0)
459 def _build_gui(self, vbox):
461 def _form_set_freq(kv):
462 # Adjust current SETI frequency, and limits
463 self.setifreq_lower = kv['freq'] - (self.seti_freq_range/2)
464 self.setifreq_current = kv['freq']
465 self.setifreq_upper = kv['freq'] + (self.seti_freq_range/2)
467 # Reset SETI analysis timer
468 self.seti_then = time.time()
469 # Zero-out hits array when changing frequency
470 self.hits_array[:,:] = 0.0
471 self.hit_intensities[:,:] = -60.0
473 return self.set_freq(kv['freq'])
475 def _form_set_decln(kv):
476 return self.set_decln(kv['decln'])
478 # Position the FFT display
479 vbox.Add(self.scope.win, 15, wx.EXPAND)
481 if self.setimode == False:
482 # Position the Total-power stripchart
483 vbox.Add(self.chart.win, 15, wx.EXPAND)
485 # add control area at the bottom
486 self.myform = myform = form.form()
487 hbox = wx.BoxSizer(wx.HORIZONTAL)
488 hbox.Add((7,0), 0, wx.EXPAND)
489 vbox1 = wx.BoxSizer(wx.VERTICAL)
490 myform['freq'] = form.float_field(
491 parent=self.panel, sizer=vbox1, label="Center freq", weight=1,
492 callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
494 vbox1.Add((4,0), 0, 0)
496 myform['lmst_high'] = form.static_text_field(
497 parent=self.panel, sizer=vbox1, label="Current LMST", weight=1)
498 vbox1.Add((4,0), 0, 0)
500 if self.setimode == False:
501 myform['spec_data'] = form.static_text_field(
502 parent=self.panel, sizer=vbox1, label="Spectral Cursor", weight=1)
503 vbox1.Add((4,0), 0, 0)
505 vbox2 = wx.BoxSizer(wx.VERTICAL)
506 if self.setimode == False:
507 vbox3 = wx.BoxSizer(wx.VERTICAL)
508 g = self.subdev[0].gain_range()
509 myform['gain'] = form.slider_field(parent=self.panel, sizer=vbox2, label="RF Gain",
511 min=int(g[0]), max=int(g[1]),
512 callback=self.set_gain)
514 vbox2.Add((4,0), 0, 0)
515 if self.setimode == True:
519 myform['average'] = form.slider_field(parent=self.panel, sizer=vbox2,
520 label="Spectral Averaging (FFT frames)", weight=1, min=1, max=max_savg, callback=self.set_averaging)
522 # Set up scan control button when in SETI mode
523 if (self.setimode == True):
524 # SETI scanning control
525 buttonbox = wx.BoxSizer(wx.HORIZONTAL)
526 self.scan_control = form.button_with_callback(self.panel,
528 callback=self.toggle_scanning)
530 buttonbox.Add(self.scan_control, 0, wx.CENTER)
531 vbox2.Add(buttonbox, 0, wx.CENTER)
533 vbox2.Add((4,0), 0, 0)
535 if self.setimode == False:
536 myform['integration'] = form.slider_field(parent=self.panel, sizer=vbox2,
537 label="Continuum Integration Time (sec)", weight=1, min=1, max=180, callback=self.set_integration)
539 vbox2.Add((4,0), 0, 0)
541 myform['decln'] = form.float_field(
542 parent=self.panel, sizer=vbox2, label="Current Declination", weight=1,
543 callback=myform.check_input_and_call(_form_set_decln))
544 vbox2.Add((4,0), 0, 0)
546 if self.setimode == False:
547 myform['offset'] = form.slider_field(parent=self.panel, sizer=vbox3,
548 label="Post-Detector Offset", weight=1, min=-750, max=750,
549 callback=self.set_pd_offset)
550 vbox3.Add((2,0), 0, 0)
551 myform['dcgain'] = form.slider_field(parent=self.panel, sizer=vbox3,
552 label="Post-Detector Gain", weight=1, min=1, max=100,
553 callback=self.set_pd_gain)
554 vbox3.Add((2,0), 0, 0)
555 hbox.Add(vbox1, 0, 0)
556 hbox.Add(vbox2, wx.ALIGN_RIGHT, 0)
558 if self.setimode == False:
559 hbox.Add(vbox3, wx.ALIGN_RIGHT, 0)
561 vbox.Add(hbox, 0, wx.EXPAND)
563 self._build_subpanel(vbox)
565 self.lmst_timer = wx.PyTimer(self.lmst_timeout)
566 self.other_timer = wx.PyTimer(self.other_timeout)
569 def _build_subpanel(self, vbox_arg):
570 # build a secondary information panel (sometimes hidden)
572 # FIXME figure out how to have this be a subpanel that is always
573 # created, but has its visibility controlled by foo.Show(True/False)
575 if not(self.show_debug_info):
582 #panel = wx.Panel(self.panel, -1)
583 #vbox = wx.BoxSizer(wx.VERTICAL)
585 hbox = wx.BoxSizer(wx.HORIZONTAL)
587 myform['decim'] = form.static_float_field(
588 parent=panel, sizer=hbox, label="Decim")
591 myform['USB BW'] = form.static_float_field(
592 parent=panel, sizer=hbox, label="USB BW")
595 myform['dbname'] = form.static_text_field(
596 parent=panel, sizer=hbox)
599 myform['baseband'] = form.static_float_field(
600 parent=panel, sizer=hbox, label="Analog BB")
603 myform['ddc'] = form.static_float_field(
604 parent=panel, sizer=hbox, label="DDC")
607 vbox.Add(hbox, 0, wx.EXPAND)
611 def set_freq(self, target_freq):
613 Set the center frequency we're interested in.
615 @param target_freq: frequency in Hz
618 Tuning is a two step process. First we ask the front-end to
619 tune as close to the desired frequency as it can. Then we use
620 the result of that operation and our target_frequency to
621 determine the value for the digital down converter.
624 # Everything except BASIC_RX should support usrp.tune()
626 if not (self.cardtype == usrp_dbid.BASIC_RX):
627 r = usrp.tune(self.u, self.subdev[0].which(), self.subdev[0], target_freq)
628 r = usrp.tune(self.u, self.subdev[1].which(), self.subdev[1], target_freq)
630 r = self.u.set_rx_freq(0, target_freq)
631 f = self.u.rx_freq(0)
632 if abs(f-target_freq) > 2.0e3:
635 self.myform['freq'].set_value(target_freq) # update displayed value
637 # Make sure calibrator knows our target freq
640 # Remember centerfreq---used for doppler calcs
641 delta = self.centerfreq - target_freq
642 self.centerfreq = target_freq
643 self.observing -= delta
644 self.scope.set_baseband_freq (self.observing)
646 self.myform['baseband'].set_value(r.baseband_freq)
647 self.myform['ddc'].set_value(r.dxc_freq)
649 if (self.use_notches):
650 self.compute_notch_taps(self.notches)
651 if self.dual_mode == False and self.interferometer == False:
652 self.notch_filt.set_taps(self.notch_taps)
654 self.notch_filt1.set_taps(self.notch_taps)
655 self.notch_filt2.set_taps(self.notch_taps)
661 def set_decln(self, dec):
663 self.myform['decln'].set_value(dec) # update displayed value
665 def set_gain(self, gain):
666 self.myform['gain'].set_value(gain) # update displayed value
667 self.subdev[0].set_gain(gain)
668 self.subdev[1].set_gain(gain)
671 def set_averaging(self, avval):
672 self.myform['average'].set_value(avval)
673 self.scope.set_avg_alpha(1.0/(avval))
674 self.scope.set_average(True)
675 self.avg_alpha = avval
677 def set_integration(self, integval):
678 if self.setimode == False:
679 self.integrator.set_taps(1.0/((integval)*(self.bw/2)))
680 self.myform['integration'].set_value(integval)
681 self.integ = integval
685 # Used to update LMST display, as well as current
688 # We also write external data-logging files here
690 def lmst_timeout(self):
691 self.locality.date = ephem.now()
692 if self.setimode == False:
693 x = self.probe.level()
694 sidtime = self.locality.sidereal_time()
696 s = str(ephem.hours(sidtime)) + " " + self.sunstate
697 # Continuum detector value
698 if self.setimode == False:
700 s = s + "\nDet: " + str(sx)
702 sx = "%2d" % self.hitcounter
703 s1 = "%2d" % self.s1hitcounter
704 s2 = "%2d" % self.s2hitcounter
705 sa = "%4.2f" % self.avgdelta
706 sy = "%3.1f-%3.1f" % (self.CHIRP_LOWER, self.CHIRP_UPPER)
707 s = s + "\nHits: " + str(sx) + "\nS1:" + str(s1) + " S2:" + str(s2)
708 s = s + "\nAv D: " + str(sa) + "\nCh lim: " + str(sy)
710 self.myform['lmst_high'].set_value(s)
713 # Write data out to recording files
715 if self.setimode == False:
716 self.write_continuum_data(x,sidtime)
717 self.write_spectral_data(self.fft_outbuf,sidtime)
720 self.seti_analysis(self.fft_outbuf,sidtime)
722 if ((self.scanning == True) and ((now - self.seti_then) > self.setifreq_timer)):
724 self.setifreq_current = self.setifreq_current + self.fft_input_rate
725 if (self.setifreq_current > self.setifreq_upper):
726 self.setifreq_current = self.setifreq_lower
727 self.set_freq(self.setifreq_current)
728 # Make sure we zero-out the hits array when changing
730 self.hits_array[:,:] = 0.0
731 self.hit_intensities[:,:] = 0.0
733 def other_timeout(self):
734 if (self.switch_state == 0):
735 self.switch_state = 1
737 elif (self.switch_state == 1):
738 self.switch_state = 0
740 if (self.switch_state == 0):
742 self.cmute.set_n(int(1.0e9))
744 elif (self.switch_state == 1):
745 self.mute.set_n(int(1.0e9))
748 if (self.ref_fifo != "@@@@"):
749 self.ref_fifo_file.write(str(self.switch_state)+"\n")
750 self.ref_fifo_file.flush()
752 self.avg_reference_value = self.cprobe.level()
755 # Set reference value
757 self.reference_level.set_k(-1.0 * (self.avg_reference_value/self.reference_divisor))
759 def fft_outfunc(self,data,l):
762 def write_continuum_data(self,data,sidtime):
764 # Create localtime structure for producing filename
765 foo = time.localtime()
767 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
768 foo.tm_mon, foo.tm_mday, foo.tm_hour)
770 # Open the data file, appending
771 continuum_file = open (filenamestr+".tpdat","a")
785 # If time to write full header info (saves storage this way)
787 if (now - self.continuum_then > 20):
788 self.sun.compute(self.locality)
790 sunset = self.locality.next_setting(self.sun)
791 sunrise = self.locality.next_rising(self.sun)
794 if ((sunrise < enow) and (enow < sunset)):
797 self.continuum_then = now
799 continuum_file.write(str(ephem.hours(sidtime))+" "+flt+" Dn="+str(inter)+",")
800 continuum_file.write("Ti="+str(integ)+",Fc="+str(fc)+",Bw="+str(bw))
801 continuum_file.write(",Ga="+str(ga)+",Sun="+str(sun_insky)+"\n")
803 continuum_file.write(str(ephem.hours(sidtime))+" "+flt+"\n")
805 continuum_file.close()
808 def write_spectral_data(self,data,sidtime):
813 # If time to write out spectral data
814 # We don't write this out every time, in order to
815 # save disk space. Since the spectral data are
816 # typically heavily averaged, writing this data
817 # "once in a while" is OK.
819 if (now - self.spectral_then >= delta):
820 self.spectral_then = now
822 # Get localtime structure to make filename from
823 foo = time.localtime()
826 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
827 foo.tm_mon, foo.tm_mday, foo.tm_hour)
830 spectral_file = open (filenamestr+".sdat","a")
832 # Setup data fields to be written
842 spectral_file.write("data:"+str(ephem.hours(sidtime))+" Dn="+str(inter)+",Fc="+str(fc)+",Bw="+str(bw)+",Av="+str(av))
843 spectral_file.write (" [ ")
845 spectral_file.write(" "+str(r))
847 spectral_file.write(" ]\n")
848 spectral_file.close()
853 def seti_analysis(self,fftbuf,sidtime):
858 if self.seticounter < self.setitimer:
859 self.seticounter = self.seticounter + 1
864 # Run through FFT output buffer, computing standard deviation (Sigma)
866 # First compute average
868 avg = avg + fftbuf[i]
872 # Then compute standard deviation (Sigma)
875 sigma = sigma + (d*d)
877 sigma = Numeric.sqrt(sigma/l)
880 # Snarfle through the FFT output buffer again, looking for
881 # outlying data points
883 start_f = self.observing - (self.fft_input_rate/2)
886 f_incr = self.fft_input_rate / l
890 for i in range(l/2,l):
892 # If current FFT buffer has an item that exceeds the specified
895 if ((fftbuf[i] - avg) > (self.setik * sigma)):
896 hits.append(current_f)
897 hit_intensities.append(fftbuf[i])
898 current_f = current_f + f_incr
901 for i in range(0,l/2):
903 # If current FFT buffer has an item that exceeds the specified
906 if ((fftbuf[i] - avg) > (self.setik * sigma)):
907 hits.append(current_f)
908 hit_intensities.append(fftbuf[i])
909 current_f = current_f + f_incr
917 # OK, so we have some hits in the FFT buffer
918 # They'll have a rather substantial gauntlet to run before
919 # being declared a real "hit"
923 self.s1hitcounter = self.s1hitcounter + len(hits)
925 # Weed out buffers with an excessive number of
926 # signals above Sigma
927 if (len(hits) > self.nhits):
931 # Weed out FFT buffers with apparent multiple narrowband signals
932 # separated significantly in frequency. This means that a
933 # single signal spanning multiple bins is OK, but a buffer that
934 # has multiple, apparently-separate, signals isn't OK.
938 for i in range(1,len(hits)):
939 if ((hits[i] - last) > (f_incr*3.0)):
944 self.s2hitcounter = self.s2hitcounter + ns2
947 # Run through all available hit buffers, computing difference between
948 # frequencies found there, if they're all within the chirp limits
952 f_ds = Numeric.zeros(self.nhitlines, Numeric.Float64)
955 for i in range(0,min(len(hits),len(self.hits_array[:,0]))):
956 f_ds[0] = abs(self.hits_array[i,0] - hits[i])
957 for j in range(1,len(f_ds)):
958 f_ds[j] = abs(self.hits_array[i,j] - self.hits_array[i,0])
959 avg_delta = avg_delta + f_ds[j]
962 if (self.seti_isahit (f_ds)):
964 self.hitcounter = self.hitcounter + 1
967 if (avg_delta/k < (self.seti_fft_bandwidth/2)):
968 self.avgdelta = avg_delta / k
970 # Save 'n shuffle hits
971 # Old hit buffers percolate through the hit buffers
972 # (there are self.nhitlines of these buffers)
973 # and then drop off the end
974 # A consequence is that while the nhitlines buffers are filling,
975 # you can get some absurd values for self.avgdelta, because some
976 # of the buffers are full of zeros
977 for i in range(self.nhitlines,1):
978 self.hits_array[:,i] = self.hits_array[:,i-1]
979 self.hit_intensities[:,i] = self.hit_intensities[:,i-1]
981 for i in range(0,len(hits)):
982 self.hits_array[i,0] = hits[i]
983 self.hit_intensities[i,0] = hit_intensities[i]
985 # Finally, write the hits/intensities buffer
987 self.write_hits(sidtime)
991 def seti_isahit(self,fdiffs):
994 for i in range(0,len(fdiffs)):
995 if (fdiffs[i] >= self.CHIRP_LOWER and fdiffs[i] <= self.CHIRP_UPPER):
996 truecount = truecount + 1
998 if truecount == len(fdiffs):
1003 def write_hits(self,sidtime):
1004 # Create localtime structure for producing filename
1005 foo = time.localtime()
1007 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
1008 foo.tm_mon, foo.tm_mday, foo.tm_hour)
1010 # Open the data file, appending
1011 hits_file = open (filenamestr+".seti","a")
1013 # Write sidtime first
1014 hits_file.write(str(ephem.hours(sidtime))+" "+str(self.decln)+" ")
1017 # Then write the hits/hit intensities buffers with enough
1018 # "syntax" to allow parsing by external (not yet written!)
1021 for i in range(0,self.nhitlines):
1022 hits_file.write(" ")
1023 for j in range(0,self.nhits):
1024 hits_file.write(str(self.hits_array[j,i])+":")
1025 hits_file.write(str(self.hit_intensities[j,i])+",")
1026 hits_file.write("\n")
1030 def xydfunc(self,func,xyv):
1031 if self.setimode == True:
1033 magn = int(Numeric.log10(self.observing))
1034 if (magn == 6 or magn == 7 or magn == 8):
1036 dfreq = xyv[0] * pow(10.0,magn)
1038 ratio = self.observing / dfreq
1047 s = "%.6f%s\n%.3fdB" % (xyv[0], xhz, xyv[1])
1048 s2 = "\n%.3fkm/s" % vs
1049 self.myform['spec_data'].set_value(s+s2)
1051 tmpnotches = Numeric.zeros(self.NOTCH_TAPS,Numeric.Float64)
1053 if self.use_notches == True:
1054 for i in range(0,len(self.notches)):
1055 if self.notches[i] != 0 and abs(self.notches[i] - dfreq) < ((self.bw/self.NOTCH_TAPS)/2.0):
1059 for i in range(0,len(self.notches)):
1061 tmpnotches[j] = self.notches[i]
1064 for i in range(0,len(tmpnotches)):
1065 if (int(tmpnotches[i]) == 0):
1066 tmpnotches[i] = dfreq
1068 self.notches = tmpnotches
1069 self.compute_notch_taps(self.notches)
1070 if self.dual_mode == False and self.interferometer == False:
1071 self.notch_filt.set_taps(self.notch_taps)
1073 self.notch_filt1.set_taps(self.notch_taps)
1074 self.notch_filt2.set_taps(self.notch_taps)
1076 def xydfunc_waterfall(self,pos):
1077 lower = self.observing - (self.seti_fft_bandwidth / 2)
1078 upper = self.observing + (self.seti_fft_bandwidth / 2)
1079 binwidth = self.seti_fft_bandwidth / 1024
1080 s = "%.6fMHz" % ((lower + (pos.x*binwidth)) / 1.0e6)
1081 self.myform['spec_data'].set_value(s)
1083 def toggle_cal(self):
1084 if (self.calstate == True):
1085 self.calstate = False
1086 self.u.write_io(0,0,(1<<15))
1087 self.calibrator.SetLabel("Calibration Source: Off")
1089 self.calstate = True
1090 self.u.write_io(0,(1<<15),(1<<15))
1091 self.calibrator.SetLabel("Calibration Source: On")
1093 def toggle_annotation(self):
1094 if (self.annotate_state == True):
1095 self.annotate_state = False
1096 self.annotation.SetLabel("Annotation: Off")
1098 self.annotate_state = True
1099 self.annotation.SetLabel("Annotation: On")
1101 # Turn scanning on/off
1102 # Called-back by "Recording" button
1104 def toggle_scanning(self):
1105 # Current scanning? Flip state
1106 if (self.scanning == True):
1107 self.scanning = False
1108 self.scan_control.SetLabel("Scan: Off")
1111 self.scanning = True
1112 self.scan_control.SetLabel("Scan: On ")
1114 def set_pd_offset(self,offs):
1115 self.myform['offset'].set_value(offs)
1116 self.calib_offset=offs
1117 x = self.calib_coeff / 100.0
1118 self.cal_offs.set_k(offs*(x*8000))
1120 def set_pd_gain(self,gain):
1121 self.myform['dcgain'].set_value(gain)
1122 self.cal_mult.set_k(gain*0.01)
1123 self.calib_coeff = gain
1125 self.cal_offs.set_k(self.calib_offset*(x*8000))
1127 def compute_notch_taps(self,notchlist):
1128 tmptaps = Numeric.zeros(self.NOTCH_TAPS,Numeric.Complex64)
1129 binwidth = self.bw / self.NOTCH_TAPS
1131 for i in range(0,self.NOTCH_TAPS):
1132 tmptaps[i] = complex(1.0,0.0)
1135 diff = i - self.observing
1138 if ((i < (self.observing - self.bw/2)) or (i > (self.observing + self.bw/2))):
1141 idx = diff / binwidth
1144 if (idx < 0 or idx > (self.NOTCH_TAPS/2)):
1146 tmptaps[idx] = complex(0.0, 0.0)
1149 idx = -diff / binwidth
1151 idx = (self.NOTCH_TAPS/2) - idx
1152 idx = int(idx+(self.NOTCH_TAPS/2))
1153 if (idx < 0 or idx >= (self.NOTCH_TAPS)):
1155 tmptaps[idx] = complex(0.0, 0.0)
1157 self.notch_taps = numpy.fft.ifft(tmptaps)
1160 # Setup common pieces of radiometer mode
1162 def setup_radiometer_common(self,n):
1163 # The IIR integration filter for post-detection
1164 self.integrator = gr.single_pole_iir_filter_ff(1.0)
1165 self.integrator.set_taps (1.0/self.bw)
1167 if (self.use_notches == True):
1168 self.compute_notch_taps(self.notches)
1170 self.notch_filt1 = gr.fft_filter_ccc(1, self.notch_taps)
1171 self.notch_filt2 = gr.fft_filter_ccc(1, self.notch_taps)
1173 self.notch_filt = gr.fft_filter_ccc(1, self.notch_taps)
1177 self.probe = gr.probe_signal_f()
1180 # Continuum calibration stuff
1182 x = self.calib_coeff/100.0
1183 self.cal_mult = gr.multiply_const_ff(self.calib_coeff/100.0)
1184 self.cal_offs = gr.add_const_ff(self.calib_offset*(x*8000))
1187 # Mega decimator after IIR filter
1189 if (self.switch_mode == False):
1190 self.keepn = gr.keep_one_in_n(gr.sizeof_float, self.bw)
1192 self.keepn = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/2))
1195 # For the Dicke-switching scheme
1197 #self.switch = gr.multiply_const_ff(1.0)
1200 if (self.switch_mode == True):
1201 self.vector = gr.vector_sink_f()
1202 self.swkeep = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/3))
1203 self.mute = gr.keep_one_in_n(gr.sizeof_float, 1)
1204 self.cmute = gr.keep_one_in_n(gr.sizeof_float, int(1.0e9))
1205 self.cintegrator = gr.single_pole_iir_filter_ff(1.0/(self.bw/2))
1206 self.cprobe = gr.probe_signal_f()
1208 self.mute = gr.multiply_const_ff(1.0)
1211 self.avg_reference_value = 0.0
1212 self.reference_level = gr.add_const_ff(0.0)
1215 # Setup ordinary single-channel radiometer mode
1217 def setup_normal(self, setimode):
1219 self.setup_radiometer_common(1)
1222 if (self.use_notches == True):
1223 self.shead = self.notch_filt
1227 if setimode == False:
1229 self.detector = gr.complex_to_mag_squared()
1230 self.connect(self.shead, self.scope)
1232 if (self.use_notches == False):
1233 self.connect(self.head, self.detector, self.mute, self.reference_level,
1234 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1236 self.connect(self.head, self.notch_filt, self.detector, self.mute, self.reference_level,
1237 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1239 self.connect(self.cal_offs, self.probe)
1242 # Add a side-chain detector chain, with a different integrator, for sampling
1243 # The reference channel data
1244 # This is used to derive the offset value for self.reference_level, used above
1246 if (self.switch_mode == True):
1247 self.connect(self.detector, self.cmute, self.cintegrator, self.swkeep, self.cprobe)
1252 # Setup dual-channel (two antenna, usual orthogonal polarity probes in the same waveguide)
1254 def setup_dual(self, setimode):
1256 self.setup_radiometer_common(2)
1258 self.di = gr.deinterleave(gr.sizeof_gr_complex)
1259 self.addchans = gr.add_cc ()
1260 self.detector = gr.add_ff ()
1261 self.h_power = gr.complex_to_mag_squared()
1262 self.v_power = gr.complex_to_mag_squared()
1263 self.connect (self.u, self.di)
1265 if (self.use_notches == True):
1266 self.connect((self.di, 0), self.notch_filt1, (self.addchans, 0))
1267 self.connect((self.di, 1), self.notch_filt2, (self.addchans, 1))
1270 # For spectral, adding the two channels works, assuming no gross
1271 # phase or amplitude error
1272 self.connect ((self.di, 0), (self.addchans, 0))
1273 self.connect ((self.di, 1), (self.addchans, 1))
1276 # Connect heads of spectral and total-power chains
1278 if (self.use_notches == False):
1281 self.head = (self.notch_filt1, self.notch_filt2)
1283 self.shead = self.addchans
1285 if (setimode == False):
1287 # For dual-polarization mode, we compute the sum of the
1288 # powers on each channel, after they've been detected
1290 self.detector = gr.add_ff()
1293 # In dual-polarization mode, we compute things a little differently
1294 # In effect, we have two radiometer chains, terminating in an adder
1296 if self.use_notches == True:
1297 self.connect(self.notch_filt1, self.h_power)
1298 self.connect(self.notch_filt2, self.v_power)
1300 self.connect((self.head, 0), self.h_power)
1301 self.connect((self.head, 1), self.v_power)
1302 self.connect(self.h_power, (self.detector, 0))
1303 self.connect(self.v_power, (self.detector, 1))
1304 self.connect(self.detector, self.mute, self.reference_level,
1305 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1306 self.connect(self.cal_offs, self.probe)
1307 self.connect(self.shead, self.scope)
1310 # Add a side-chain detector chain, with a different integrator, for sampling
1311 # The reference channel data
1312 # This is used to derive the offset value for self.reference_level, used above
1314 if (self.switch_mode == True):
1315 self.connect(self.detector, self.cmute, self.cintegrator, self.swkeep, self.cprobe)
1319 # Setup correlating interferometer mode
1321 def setup_interferometer(self, setimode):
1322 self.setup_radiometer_common(2)
1324 self.di = gr.deinterleave(gr.sizeof_gr_complex)
1325 self.connect (self.u, self.di)
1326 self.corr = gr.multiply_cc()
1327 self.c2f = gr.complex_to_float()
1329 self.shead = (self.di, 0)
1331 # Channel 0 to multiply port 0
1332 # Channel 1 to multiply port 1
1333 if (self.use_notches == False):
1334 self.connect((self.di, 0), (self.corr, 0))
1335 self.connect((self.di, 1), (self.corr, 1))
1337 self.connect((self.di, 0), self.notch_filt1, (self.corr, 0))
1338 self.connect((self.di, 1), self.notch_filt2, (self.corr, 0))
1341 # Multiplier (correlator) to complex-to-float, followed by integrator, etc
1343 self.connect(self.corr, self.c2f, self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1346 # FFT scope gets only 1 channel
1347 # FIX THIS, by cross-correlating the *outputs* of two different FFTs, then display
1350 self.connect(self.shead, self.scope)
1353 # Output of correlator/integrator chain to probe
1355 self.connect(self.cal_offs, self.probe)
1362 def setup_seti(self):
1363 self.connect (self.shead, self.fft_bandpass, self.scope)
1369 app = stdgui2.stdapp(app_flow_graph, "RADIO ASTRONOMY SPECTRAL/CONTINUUM RECEIVER: $Revision$", nstatus=1)
1372 if __name__ == '__main__':