#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
+# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
from gnuradio import gr, gru
from gnuradio import usrp
-import usrp_dbid
+from usrpm import usrp_dbid
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from gnuradio.wxgui import stdgui, ra_fftsink, ra_stripchartsink, ra_waterfallsink, form, slider
parser.add_option("-M", "--fft_rate", type="eng_float", default=8.0, help="FFT Rate")
parser.add_option("-A", "--calib_coeff", type="eng_float", default=1.0, help="Calibration coefficient")
parser.add_option("-B", "--calib_offset", type="eng_float", default=0.0, help="Calibration coefficient")
- parser.add_option("-Q", "--calib_eqn", default="x = x * 1.0", help="Calibration equation")
parser.add_option("-W", "--waterfall", action="store_true", default=False, help="Use Waterfall FFT display")
parser.add_option("-S", "--setimode", action="store_true", default=False, help="Enable SETI processing of spectral data")
parser.add_option("-K", "--setik", type="eng_float", default=1.5, help="K value for SETI analysis")
+ parser.add_option("-T", "--setibandwidth", type="eng_float", default=12500, help="Instantaneous SETI observing bandwidth--must be divisor of 250Khz")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
self.show_debug_info = True
+ # Pick up waterfall option
self.waterfall = options.waterfall
# SETI mode stuff
self.setimode = options.setimode
self.seticounter = 0
self.setik = options.setik
- self.seti_fft_bandwidth = 12500
+ # Because we force the input rate to be 250Khz, 12.5Khz is
+ # exactly 1/20th of this, which makes building decimators
+ # easier.
+ # This also allows larger FFTs to be used without totally-gobbling
+ # CPU. With an FFT size of 16384, for example, this bandwidth
+ # yields a binwidth of 0.762Hz, and plenty of CPU left over
+ # for other things, like the SETI analysis code.
+ #
+ self.seti_fft_bandwidth = int(options.setibandwidth)
+
+ # Calculate binwidth
binwidth = self.seti_fft_bandwidth / options.fft_size
+
+ # Use binwidth, and knowledge of likely chirp rates to set reasonable
+ # values for SETI analysis code. We assume that SETI signals will
+ # chirp at somewhere between 0.10Hz/sec and 0.25Hz/sec.
+ #
+ # upper_limit is the "worst case"--that is, the case for which we have
+ # wait the longest to actually see any drift, due to the quantizing
+ # on FFT bins.
upper_limit = binwidth / 0.10
self.setitimer = int(upper_limit * 2.00)
+ self.scanning = True
+
+ # Calculate the CHIRP values based on Hz/sec
self.CHIRP_LOWER = 0.10 * self.setitimer
self.CHIRP_UPPER = 0.25 * self.setitimer
+
+ # Reset hit counter to 0
self.hitcounter = 0
# We scan through 1Mhz of bandwidth around the chosen center freq
self.seti_freq_range = 1.0e6
+ # Calculate lower edge
self.setifreq_lower = options.freq - (self.seti_freq_range/2)
self.setifreq_current = options.freq
+ # Calculate upper edge
self.setifreq_upper = options.freq + (self.seti_freq_range/2)
+
+ # We change center frequencies every 10 self.setitimer intervals
self.setifreq_timer = self.setitimer * 10
+
+ # Create actual timer
self.seti_then = time.time()
- self.nhits = 10
- self.hits_array = Numeric.zeros((self.nhits,3), Numeric.Float64)
+ # The hits recording array
+ self.nhits = 10
+ self.nhitlines = 3
+ self.hits_array = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
+ self.hit_intensities = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
# Calibration coefficient and offset
self.calib_coeff = options.calib_coeff
self.calib_offset = options.calib_offset
+ if self.calib_offset < -750:
+ self.calib_offset = -750
+ if self.calib_offset > 750:
+ self.calib_offset = 750
- self.calib_eqn = options.calib_eqn
- globals()["calibration_codelet"] = self.calib_eqn
+ if self.calib_coeff < 1:
+ self.calib_offset = 1
+ if self.calib_coeff > 100:
+ self.calib_offset = 100
self.integ = options.integ
self.avg_alpha = options.avg
self.u = usrp.source_c(decim_rate=options.decim)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
- self.cardtype = self.u.daughterboard_id(0)
# Set initial declination
self.decln = options.decln
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
+ self.cardtype = self.subdev.dbid()
input_rate = self.u.adc_freq() / self.u.decim_rate()
#
self.fft_rate = options.fft_rate
- self.fft_size = options.fft_size
+ self.fft_size = int(options.fft_size)
# This buffer is used to remember the most-recent FFT display
# values. Used later by self.write_spectral_data() to write
- # spectral data to datalogging files.
- self.fft_outbuf = Numeric.zeros(options.fft_size, Numeric.Float64)
+ # spectral data to datalogging files, and by the SETI analysis
+ # function.
+ #
+ self.fft_outbuf = Numeric.zeros(self.fft_size, Numeric.Float64)
#
- # If SETI mode, only look at a input_rate/8 at a time
+ # If SETI mode, only look at seti_fft_bandwidth (currently 12.5Khz)
+ # at a time.
#
if (self.setimode):
self.fft_input_rate = self.seti_fft_bandwidth
self.fft_input_taps)
else:
self.fft_input_rate = input_rate
+
# Set up FFT display
if self.waterfall == False:
self.scope = ra_fftsink.ra_fft_sink_c (self, panel,
else:
self.scope = ra_waterfallsink.ra_waterfallsink_c (self, panel,
fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
- fft_rate=int(self.fft_rate), title="Spectral", ofunc=self.fft_outfunc, xydfunc=self.xydfunc)
+ fft_rate=int(self.fft_rate), title="Spectral", ofunc=self.fft_outfunc, xydfunc=self.xydfunc_waterfall)
# Set up ephemeris data
self.locality = ephem.Observer()
self.locality.long = str(options.longitude)
self.locality.lat = str(options.latitude)
+ # We make notes about Sunset/Sunrise in Continuum log files
+ self.sun = ephem.Sun()
+ self.sunstate = "??"
# Set up stripchart display
self.stripsize = int(options.stripsize)
- self.chart = ra_stripchartsink.stripchart_sink_f (self, panel,
- stripsize=self.stripsize,
- title="Continuum",
- xlabel="LMST Offset (Seconds)",
- scaling=1.0, ylabel=options.ylabel,
- divbase=options.divbase)
+ if self.setimode == False:
+ self.chart = ra_stripchartsink.stripchart_sink_f (self, panel,
+ stripsize=self.stripsize,
+ title="Continuum",
+ xlabel="LMST Offset (Seconds)",
+ scaling=1.0, ylabel=options.ylabel,
+ divbase=options.divbase)
# Set center frequency
self.centerfreq = options.freq
# Call constructors for receive chains
#
- # The three integrators--two FIR filters, and an IIR final filter
- self.integrator1 = gr.fir_filter_fff (N, tapsN)
- self.integrator2 = gr.fir_filter_fff (M, tapsM)
- self.integrator3 = gr.single_pole_iir_filter_ff(1.0)
-
- # Split complex USRP stream into a pair of floats
- self.splitter = gr.complex_to_float (1);
-
- # I squarer (detector)
- self.multI = gr.multiply_ff();
-
- # Q squarer (detector)
- self.multQ = gr.multiply_ff();
-
- # Adding squared I and Q to produce instantaneous signal power
- self.adder = gr.add_ff();
-
- # Signal probe
- self.probe = gr.probe_signal_f();
-
- #
- # Continuum calibration stuff
- #
- self.cal_mult = gr.multiply_const_ff(self.calib_coeff);
- self.cal_offs = gr.add_const_ff(self.calib_offset);
+ if self.setimode == False:
+ # The three integrators--two FIR filters, and an IIR final filter
+ self.integrator1 = gr.fir_filter_fff (N, tapsN)
+ self.integrator2 = gr.fir_filter_fff (M, tapsM)
+ self.integrator3 = gr.single_pole_iir_filter_ff(1.0)
+
+ # The detector
+ self.detector = gr.complex_to_mag_squared()
- #self.cal_eqn = continuum_calibration();
+ # Split complex USRP stream into a pair of floats
+ #self.splitter = gr.complex_to_float (1);
+
+# # I squarer (detector)
+# self.multI = gr.multiply_ff();
+#
+# # Q squarer (detector)
+# self.multQ = gr.multiply_ff();
+#
+# # Adding squared I and Q to produce instantaneous signal power
+# self.adder = gr.add_ff();
+
+ # Signal probe
+ self.probe = gr.probe_signal_f();
+
+ #
+ # Continuum calibration stuff
+ #
+ self.cal_mult = gr.multiply_const_ff(self.calib_coeff/100.0);
+ self.cal_offs = gr.add_const_ff(self.calib_offset*4000);
#
# Start connecting configured modules in the receive chain
else:
self.connect(self.u, self.fft_bandpass, self.scope)
- #
- # The head of the continuum chain
- #
- self.connect(self.u, self.splitter)
-
- # Connect splitter outputs to multipliers
- # First do I^2
- self.connect((self.splitter, 0), (self.multI,0))
- self.connect((self.splitter, 0), (self.multI,1))
-
- # Then do Q^2
- self.connect((self.splitter, 1), (self.multQ,0))
- self.connect((self.splitter, 1), (self.multQ,1))
-
- # Then sum the squares
- self.connect(self.multI, (self.adder,0))
- self.connect(self.multQ, (self.adder,1))
-
- # Connect adder output to two-stages of FIR integrator
- # followed by a single stage IIR integrator, and
- # the calibrator
- self.connect(self.adder, self.integrator1,
- self.integrator2, self.integrator3, self.cal_mult,
- self.cal_offs, self.chart)
-
- # Connect calibrator to probe
- # SPECIAL NOTE: I'm setting the ground work here
- # for completely changing the way local_calibrator
- # works, including removing some horrible kludges for
- # recording data.
- # But for now, self.probe() will be used to display the
- # current instantaneous integrated detector value
- self.connect(self.cal_offs, self.probe)
+ if self.setimode == False:
+# #
+# # The head of the continuum chain
+# #
+# self.connect(self.u, self.splitter)
+#
+# # Connect splitter outputs to multipliers
+# # First do I^2
+# self.connect((self.splitter, 0), (self.multI,0))
+# self.connect((self.splitter, 0), (self.multI,1))
+#
+# # Then do Q^2
+# self.connect((self.splitter, 1), (self.multQ,0))
+# self.connect((self.splitter, 1), (self.multQ,1))
+#
+# # Then sum the squares
+# self.connect(self.multI, (self.adder,0))
+# self.connect(self.multQ, (self.adder,1))
+#
+# # Connect adder output to two-stages of FIR integrator
+# # followed by a single stage IIR integrator, and
+# # the calibrator
+# self.connect(self.adder, self.integrator1,
+# self.integrator2, self.integrator3, self.cal_mult,
+# self.cal_offs, self.chart)
+
+ self.connect(self.u, self.detector,
+ self.integrator1, self.integrator2,
+ self.integrator3, self.cal_mult, self.cal_offs, self.chart)
+
+ # current instantaneous integrated detector value
+ self.connect(self.cal_offs, self.probe)
self._build_gui(vbox)
# Make GUI agree with command-line
self.integ = options.integ
- self.myform['integration'].set_value(int(options.integ))
+ if self.setimode == False:
+ self.myform['integration'].set_value(int(options.integ))
+ self.myform['offset'].set_value(self.calib_offset)
+ self.myform['dcgain'].set_value(self.calib_coeff)
self.myform['average'].set_value(int(options.avg))
- # Make integrator agree with command line
- self.set_integration(int(options.integ))
+
+ if self.setimode == False:
+ # Make integrator agree with command line
+ self.set_integration(int(options.integ))
self.avg_alpha = options.avg
self.scope.set_avg_alpha(float(1.0/options.avg))
self.scope.set_average(True)
- # Set division size
- self.chart.set_y_per_div(options.division)
-
- # Set reference(MAX) level
- self.chart.set_ref_level(options.reflevel)
+ if self.setimode == False:
+ # Set division size
+ self.chart.set_y_per_div(options.division)
+ # Set reference(MAX) level
+ self.chart.set_ref_level(options.reflevel)
# set initial values
self.myform['dbname'].set_value(self.subdev.name())
# Set analog baseband filtering, if DBS_RX
- if self.cardtype == usrp_dbid.DBS_RX:
+ if self.cardtype in (usrp_dbid.DBS_RX, usrp_dbid.DBS_RX_REV_2_1):
lbw = (self.u.adc_freq() / self.u.decim_rate()) / 2
if lbw < 1.0e6:
lbw = 1.0e6
def _build_gui(self, vbox):
def _form_set_freq(kv):
+ # Adjust current SETI frequency, and limits
self.setifreq_lower = kv['freq'] - (self.seti_freq_range/2)
self.setifreq_current = kv['freq']
self.setifreq_upper = kv['freq'] + (self.seti_freq_range/2)
+
+ # Reset SETI analysis timer
self.seti_then = time.time()
+ # Zero-out hits array when changing frequency
self.hits_array[:,:] = 0.0
+ self.hit_intensities[:,:] = -60.0
+
return self.set_freq(kv['freq'])
def _form_set_decln(kv):
# Position the FFT display
vbox.Add(self.scope.win, 15, wx.EXPAND)
- # Position the Total-power stripchart
- vbox.Add(self.chart.win, 15, wx.EXPAND)
+ if self.setimode == False:
+ # Position the Total-power stripchart
+ vbox.Add(self.chart.win, 15, wx.EXPAND)
# add control area at the bottom
self.myform = myform = form.form()
vbox1.Add((4,0), 0, 0)
vbox2 = wx.BoxSizer(wx.VERTICAL)
+ if self.setimode == False:
+ vbox3 = wx.BoxSizer(wx.VERTICAL)
g = self.subdev.gain_range()
myform['gain'] = form.slider_field(parent=self.panel, sizer=vbox2, label="RF Gain",
weight=1,
vbox2.Add((4,0), 0, 0)
myform['average'] = form.slider_field(parent=self.panel, sizer=vbox2,
- label="Spectral Averaging (FFT frames)", weight=1, min=1, max=2000, callback=self.set_averaging)
+ label="Spectral Averaging (FFT frames)", weight=1, min=1, max=3000, callback=self.set_averaging)
+
+ # Set up scan control button when in SETI mode
+ if (self.setimode == True):
+ # SETI scanning control
+ buttonbox = wx.BoxSizer(wx.HORIZONTAL)
+ self.scan_control = form.button_with_callback(self.panel,
+ label="Scan: On ",
+ callback=self.toggle_scanning)
+
+ buttonbox.Add(self.scan_control, 0, wx.CENTER)
+ vbox2.Add(buttonbox, 0, wx.CENTER)
vbox2.Add((4,0), 0, 0)
- myform['integration'] = form.slider_field(parent=self.panel, sizer=vbox2,
- label="Continuum Integration Time (sec)", weight=1, min=1, max=180, callback=self.set_integration)
+ if self.setimode == False:
+ myform['integration'] = form.slider_field(parent=self.panel, sizer=vbox2,
+ label="Continuum Integration Time (sec)", weight=1, min=1, max=180, callback=self.set_integration)
+
+ vbox2.Add((4,0), 0, 0)
- vbox2.Add((4,0), 0, 0)
myform['decln'] = form.float_field(
parent=self.panel, sizer=vbox2, label="Current Declination", weight=1,
callback=myform.check_input_and_call(_form_set_decln))
vbox2.Add((4,0), 0, 0)
- buttonbox = wx.BoxSizer(wx.HORIZONTAL)
- vbox.Add(buttonbox, 0, wx.CENTER)
+ if self.setimode == False:
+ myform['offset'] = form.slider_field(parent=self.panel, sizer=vbox3,
+ label="Post-Detector Offset", weight=1, min=-750, max=750,
+ callback=self.set_pd_offset)
+ vbox3.Add((2,0), 0, 0)
+ myform['dcgain'] = form.slider_field(parent=self.panel, sizer=vbox3,
+ label="Post-Detector Gain", weight=1, min=1, max=100,
+ callback=self.set_pd_gain)
+ vbox3.Add((2,0), 0, 0)
hbox.Add(vbox1, 0, 0)
- hbox.Add(vbox2, wx.ALIGN_RIGHT, 0)
+ hbox.Add(vbox2, wx.ALIGN_RIGHT, 0)
+
+ if self.setimode == False:
+ hbox.Add(vbox3, wx.ALIGN_RIGHT, 0)
+
vbox.Add(hbox, 0, wx.EXPAND)
self._build_subpanel(vbox)
self.avg_alpha = avval
def set_integration(self, integval):
- self.integrator3.set_taps(1.0/integval)
+ if self.setimode == False:
+ self.integrator3.set_taps(1.0/integval)
self.myform['integration'].set_value(integval)
self.integ = integval
#
def lmst_timeout(self):
self.locality.date = ephem.now()
- x = self.probe.level()
+ if self.setimode == False:
+ x = self.probe.level()
sidtime = self.locality.sidereal_time()
# LMST
- s = str(ephem.hours(sidtime))
+ s = str(ephem.hours(sidtime)) + " " + self.sunstate
# Continuum detector value
- sx = "%7.4f" % x
- s = s + "\nDet: " + str(sx)
- sx = "%2d" % self.hitcounter
- sy = "%3.1f/%3.1f" % (self.CHIRP_LOWER, self.CHIRP_UPPER)
- s = s + "\nH: " + str(sx) + " C: " + str(sy)
+ if self.setimode == False:
+ sx = "%7.4f" % x
+ s = s + "\nDet: " + str(sx)
+ else:
+ sx = "%2d" % self.hitcounter
+ sy = "%3.1f-%3.1f" % (self.CHIRP_LOWER, self.CHIRP_UPPER)
+ s = s + "\nHits: " + str(sx) + "\nCh lim: " + str(sy)
self.myform['lmst_high'].set_value(s)
#
self.write_continuum_data(x,sidtime)
self.write_spectral_data(self.fft_outbuf,sidtime)
- if self.setimode == True:
+ else:
self.seti_analysis(self.fft_outbuf,sidtime)
now = time.time()
- if ((now - self.seti_then) > self.setifreq_timer):
+ if ((self.scanning == True) and ((now - self.seti_then) > self.setifreq_timer)):
self.seti_then = now
self.setifreq_current = self.setifreq_current + self.fft_input_rate
if (self.setifreq_current > self.setifreq_upper):
self.setifreq_current = self.setifreq_lower
self.set_freq(self.setifreq_current)
+ # Make sure we zero-out the hits array when changing
+ # frequency.
self.hits_array[:,:] = 0.0
+ self.hit_intensities[:,:] = 0.0
def fft_outfunc(self,data,l):
self.fft_outbuf=data
# If time to write full header info (saves storage this way)
#
if (now - self.continuum_then > 20):
+ self.sun.compute(self.locality)
+ enow = ephem.now()
+ sun_insky = "Down"
+ self.sunstate = "Dn"
+ if ((self.sun.rise_time < enow) and (enow < self.sun.set_time)):
+ sun_insky = "Up"
+ self.sunstate = "Up"
self.continuum_then = now
continuum_file.write(str(ephem.hours(sidtime))+" "+flt+" Dn="+str(inter)+",")
continuum_file.write("Ti="+str(integ)+",Fc="+str(fc)+",Bw="+str(bw))
- continuum_file.write(",Ga="+str(ga)+"\n")
+ continuum_file.write(",Ga="+str(ga)+",Sun="+str(sun_insky)+"\n")
else:
continuum_file.write(str(ephem.hours(sidtime))+" "+flt+"\n")
l = len(fftbuf)
x = 0
hits = []
+ hit_intensities = []
if self.seticounter < self.setitimer:
self.seticounter = self.seticounter + 1
return
#
if ((fftbuf[i] - avg) > (self.setik * sigma)):
hits.append(current_f)
+ hit_intensities.append(fftbuf[i])
current_f = current_f + f_incr
# DC to nyquist
#
if ((fftbuf[i] - avg) > (self.setik * sigma)):
hits.append(current_f)
+ hit_intensities.append(fftbuf[i])
current_f = current_f + f_incr
+ # No hits
if (len(hits) <= 0):
return
+ #
+ # OK, so we have some hits in the FFT buffer
+ # They'll have a rather substantial gauntlet to run before
+ # being declared a real "hit"
+ #
+
+ # Weed out buffers with an excessive number of strong signals
if (len(hits) > self.nhits):
return
+ # Weed out FFT buffers with apparent multiple narrowband signals
+ # separated significantly in frequency. This means that a
+ # single signal spanning multiple bins is OK, but a buffer that
+ # has multiple, apparently-separate, signals isn't OK.
+ #
+ last = hits[0]
+ for i in range(1,len(hits)):
+ if ((hits[i] - last) > (f_incr*2.0)):
+ return
+ last = hits[i]
#
# Run through all three hit buffers, computing difference between
self.hitcounter = self.hitcounter + 1
break
- if (good_hit):
- self.write_hits(hits,sidtime)
# Save 'n shuffle hits
- self.hits_array[:,2] = self.hits_array[:,1]
- self.hits_array[:,1] = self.hits_array[:,0]
+ for i in range(self.nhitlines,1):
+ self.hits_array[:,i] = self.hits_array[:,i-1]
+ self.hit_intensities[:,i] = self.hit_intensities[:,i-1]
for i in range(0,len(hits)):
self.hits_array[i,0] = hits[i]
+ self.hit_intensities[i,0] = hit_intensities[i]
+
+ # Finally, write the hits/intensities buffer
+ if (good_hit):
+ self.write_hits(sidtime)
return
else:
return (False)
- def write_hits(self,hits,sidtime):
+ def write_hits(self,sidtime):
# Create localtime structure for producing filename
foo = time.localtime()
pfx = self.prefix
# Open the data file, appending
hits_file = open (filenamestr+".seti","a")
- hits_file.write(str(ephem.hours(sidtime))+" "+str(self.decln)+" "+str(hits)+"\n")
+
+ # Write sidtime first
+ hits_file.write(str(ephem.hours(sidtime))+" "+str(self.decln)+" ")
+
+ #
+ # Then write the hits/hit intensities buffers with enough
+ # "syntax" to allow parsing by external (not yet written!)
+ # "stuff".
+ #
+ for i in range(0,self.nhitlines):
+ hits_file.write(" ")
+ for j in range(0,self.nhits):
+ hits_file.write(str(self.hits_array[j,i])+":")
+ hits_file.write(str(self.hit_intensities[j,i])+",")
+ hits_file.write("\n")
hits_file.close()
return
s2 = "\n%.3fkm/s" % vs
self.myform['spec_data'].set_value(s+s2)
+ def xydfunc_waterfall(self,pos):
+ lower = self.observing - (self.seti_fft_bandwidth / 2)
+ upper = self.observing + (self.seti_fft_bandwidth / 2)
+ binwidth = self.seti_fft_bandwidth / 1024
+ s = "%.6fMHz" % ((lower + (pos.x*binwidth)) / 1.0e6)
+ self.myform['spec_data'].set_value(s)
+
def toggle_cal(self):
if (self.calstate == True):
self.calstate = False
else:
self.annotate_state = True
self.annotation.SetLabel("Annotation: On")
-
+ #
+ # Turn scanning on/off
+ # Called-back by "Recording" button
+ #
+ def toggle_scanning(self):
+ # Current scanning? Flip state
+ if (self.scanning == True):
+ self.scanning = False
+ self.scan_control.SetLabel("Scan: Off")
+ # Not scanning
+ else:
+ self.scanning = True
+ self.scan_control.SetLabel("Scan: On ")
+
+ def set_pd_offset(self,offs):
+ self.myform['offset'].set_value(offs)
+ self.calib_offset=offs
+ self.cal_offs.set_k(offs*4000)
+
+ def set_pd_gain(self,gain):
+ self.myform['dcgain'].set_value(gain)
+ self.cal_mult.set_k(gain*0.01)
+ self.calib_coeff = gain
def main ():
app = stdgui.stdapp(app_flow_graph, "RADIO ASTRONOMY SPECTRAL/CONTINUUM RECEIVER: $Revision$", nstatus=1)
projects / debian / gnuradio / blobdiff