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Ċ 144 MHz yagi.pdf
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  850k v. 1 Feb 2, 2013, 6:59 PM David Lonard
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148MHz 9 el Yagi drift scan 54 DEC.jpg
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4 day drift scan - 148 MHz, 50 ksps, 9 el Yagi pointed at 54 DEC  104k v. 1 Feb 25, 2013, 8:57 AM David Lonard
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149 mhz drift scan saw filter.fit
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multi day driftscan at 149 MHz with G0KSC Yagis - SAW filter front end  1356k v. 1 Jan 25, 2013, 6:44 PM David Lonard
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20wwv.jpg
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10 million point FFT of the 20 MHz WWV carrier. QS1R with Valon/Thunderbolt used to grab signal at 50 ksps. Layers of movement in the ionosphere are evident.  49k v. 2 Sep 1, 2012, 9:28 AM David Lonard
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2500 KSPS 149 MHz SAW filter.jpg
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spectrogram centered on 149 MHz with 8 element phased array 2.5 MSPS. Satellite signals are easily detected. Crazy amounts of interference, even with a low IL SAW filter in front of preamp...  1367k v. 5 Aug 2, 2012, 6:00 AM David Lonard
ć 406 horn.pptx
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400.1 MHz horn antenna testing   3487k v. 1 Aug 26, 2012, 6:47 PM David Lonard
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408 dec22 3days.jpg
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408 MHz horn + cavity - pointed at 22+ DEC; 3 day drift scan  102k v. 1 Nov 3, 2012, 6:37 PM David Lonard
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4days148mhz.fit
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4 days drift scan rural location at 54 degrees DEC 148 Mhz 50 ksps 9 element Yagi with SAW filter preamp  1741k v. 1 Feb 24, 2013, 6:00 PM David Lonard
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4days.fit
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4 day 50 ksps driftscan at 10 degrees DEC. Lots of RFI. 408.5 MHz Horn antenna/cavity LNA  2107k v. 1 Nov 17, 2012, 12:46 PM David Lonard
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9 element yagi parameters.nec
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9 element yagi for 149 MHz - improved F/R ratio  1k v. 1 Jan 27, 2013, 2:02 PM David Lonard
Ċ 9 element yagi.pdf
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9 element Yagi to replace 8 element Yagi  266k v. 1 Jan 27, 2013, 2:03 PM David Lonard
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antennaitems.jpg
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Mini Circuits filter and preamp on top, perfect accessory for the QS1R. Antenna array in the backyard, 8 elements. Close up of antenna feedpoint  83k v. 1 Nov 30, 2011, 7:25 PM David Lonard
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aquilacrop.fit
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  1153k v. 1 Apr 8, 2013, 8:07 PM David Lonard
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aquila neutral hydrogen.jpg
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With new Potter horn - antenna still has issues but its already better than pyramidal horn  40k v. 1 Mar 31, 2013, 4:15 PM David Lonard
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b0329crop.fit
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B0329+54 pointing 2.5 MSPS  1122k v. 1 Feb 26, 2013, 5:07 PM David Lonard
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bcrop.fit
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2.5 Msps sample through 54+ DEC at 408 MHz  2140k v. 1 Oct 31, 2012, 4:53 AM David Lonard
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blockrecorderb.py
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record neutral hydrogen signal at 2.5 MSPS with SDRMAX server  1k v. 2 Jul 15, 2012, 7:59 AM David Lonard
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blockrecorderc.py
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Another version to record at 500 ksps  1k v. 1 Sep 1, 2012, 9:29 AM David Lonard
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bootes7_15_2012.jpg
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neutral hydrogen spectra pointed at Bootes 7-15-2012  55k v. 2 Jul 15, 2012, 8:00 AM David Lonard
Ċ cavity LNA 408 MHz first light.pdf
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first light data from 408 MHz cavity LNA  300k v. 1 Oct 26, 2012, 6:13 PM David Lonard
Ċ Cavity LNA 408 MHz.pdf
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description and pics of my big horn and RAS cavity filter for 408 MHz  922k v. 1 Oct 26, 2012, 6:12 PM David Lonard
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codar.fits
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CODAR spectrogram at 4.660 MHz  FITs spectrogram for analysis with Python/Numpy or IRIS  9773k v. 2 Jan 30, 2012, 7:01 AM David Lonard
ć codar.pptx
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  5252k v. 4 Jan 28, 2012, 9:37 AM David Lonard
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correlator.py
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Correlate two IQ Fits files generated by wavereaderiq.py   This was used to generate 'fringes.jpg'  2k v. 2 Jan 30, 2012, 7:01 AM David Lonard
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dmmap.py
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latest dedisperser code for 408 MHz. Under development...  2k v. 2 Aug 2, 2012, 2:08 PM David Lonard
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flat reader.py
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Generate a flat file to correct spectrogram gain ripple  1k v. 2 Jul 15, 2012, 8:00 AM David Lonard
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folded2.fits
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pulsar folding attempt for B0329+54  276k v. 1 Nov 17, 2012, 12:46 PM David Lonard
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g0ksc 100 ohm 149 mhz.nec
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4nec2 model for 149 MHz Yagi antenna - 100 Ohm feedpoint impedance to couple with SAW filter   1k v. 1 Jan 12, 2013, 6:41 PM David Lonard
Ċ hydrogen 4-21-2012.pdf
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  821k v. 1 Apr 22, 2012, 2:56 PM David Lonard
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leocrop.fit
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  835k v. 1 Apr 8, 2013, 8:02 PM David Lonard
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maskexample.fit
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Masking RFI for total power measurements or pulsar data folding  1972k v. 1 Nov 17, 2012, 12:47 PM David Lonard
Ċ neutral hydrogen horn antenna receiver system 4-9-2013.pdf
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First light with Skobelev multi-mode horn antenna  446k v. 1 Apr 9, 2013, 7:59 AM David Lonard
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noise problem.jpg
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  51k v. 1 Nov 24, 2013, 9:06 AM David Lonard
Ċ panoramic spectrum.pdf
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Wide band spectrum from QS1R + Valon synth. Real frequency is "LO xxx" + SRDMAXV frequency. I am in a very hostile RF environment at my QTH.  5568k v. 3 Aug 2, 2012, 6:13 AM David Lonard
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phase.py
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least means squared alignment of two data streams  2k v. 1 Jan 4, 2013, 2:51 PM David Lonard
Ċ QS1R microwave.pdf
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  2527k v. 1 Apr 23, 2012, 12:24 PM David Lonard
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QS1R mixer basic configuration.jpg
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  232k v. 1 Aug 28, 2012, 7:31 AM David Lonard
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qs1r_timed_recording.py
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QS1R timed recorder 32500 kHz, 500 ksps, 4 hours  This is the file to do timed recording for VLBI stations. Make sure to synch system time just prior to running the script.    2k v. 11 Jan 30, 2012, 7:05 AM David Lonard
ć QS1R UHF.pptx
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  3319k v. 1 Mar 5, 2012, 6:54 PM David Lonard
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series reader.py
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Process a group of WAV files to generate a high S/N spectrogram over a long time period  1k v. 1 Sep 1, 2012, 9:30 AM David Lonard
Ċ SETI horn of plenty and hardware layout.pdf
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SETI League "Horn of Plenty" for Hydrogen line reception, etc. Second slide is an improved layout for the QS1R for microwave work  545k v. 2 Mar 17, 2012, 1:13 PM David Lonard
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single reader mask.py
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Read a WAV file and mask out interference 'birds'. Save file as series of spectrograms.  1k v. 1 Nov 4, 2012, 2:00 PM David Lonard
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single reader.py
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Read a single WAV file and convert sample stream into spectrogram  1k v. 1 Sep 1, 2012, 9:32 AM David Lonard
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spec fft.py
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  2k v. 1 Apr 29, 2013, 8:02 AM David Lonard
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spec reader3.py
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  1k v. 1 May 4, 2013, 5:54 AM David Lonard
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tauruscrop.fit
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  976k v. 1 Apr 8, 2013, 8:04 PM David Lonard
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taurus neutral hydrogen.jpg
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New Potter horn - neutral hydrogen  41k v. 1 Mar 31, 2013, 4:15 PM David Lonard
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twometers.jpg
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24 hours spectrogram at 150 MHz   669k v. 2 Jun 27, 2012, 5:34 PM David Lonard
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valon.jpg
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Valon Synthesizer (green) and divider (red) driving a QS1R. Thunderbolt GPS 10 MHz reference is used.  72k v. 1 Nov 30, 2011, 7:15 PM David Lonard
ć VLBIproject1-30-2012.pptx
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VLBI project details and update for Jan. 30,2012  3829k v. 1 Jan 30, 2012, 8:43 AM David Lonard
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WCdriftscan148MHz.jpg
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West Columbia - 148 MHz driftscan - SAW filter - 9 element G0KSC yagi - 54 degrees DEC - 19 hours duration  57k v. 1 Feb 17, 2013, 12:37 PM David Lonard
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zenith7_21_div.fit
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High quality neutral hydrogen spectrogram pointed through zenith - transit of galactic plane through Taurus  2129k v. 2 Jul 21, 2012, 12:45 PM David Lonard
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zenith7_21.jpg
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High S/N spectrogram of zenith transit, SETI Horn of Plenty pointing at Taurus - 2 hour time span  130k v. 2 Jul 21, 2012, 4:04 PM David Lonard
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