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wg7:apod:observing_apod
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| - | ====== Observing APOD ====== | ||
| - | APOD, a chinese CubSat has been in Space since late 2015. One of its satellites carries a VLBI beacon. Since then, several efforts were undertaken to observe APOD. | ||
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| - | ===== Observing APOD with AuScope ===== | ||
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| - | We have had several attempts in observing APOD with the AuScope antennas in Hobart, Katherine and Yarragadee. Due to the long baselines, the tracks are relatively short. Our attempts here at the University of Tasmania to correlate the data have not really been successful so far. | ||
| - | However, in November we will intensively try to collect more data. This includes an optimised tracking (continuous tracking should be possible with our antennas) and the observations themselves. Andreas Hellerschmied from Vienna will visit us and Tim Natusch from Auckland has also agreed to support us by providing the Warkworth antenna. Hoping to report on successful observations soon. | ||
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| - | ==== Tracking tests Nov 11-14 ==== | ||
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| - | Friday, Nov 11: tracking tests with Ho26m. Some tests using ISS signal; S-band beacon (2270) clearly detected, stable throughout track. Sattrack worked smoothly after drive PC reboot. Testing AzEl track for APOD of the next day. Found we can only do one side of the track (up to about 30 deg elevation). | ||
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| - | Saturday, Nov 12 (**316b**): Morning: APOD track with Ke and Yg. Blocks of quasars before and after (10 min). 5 min break between quasar and sat. AzEl files are manually loaded via antenna control HMI. Quite stressy but works. Signal (carrier and DOR tones) was clearly visible in spectrum analysers, both in S-band and X-band. DOR tones also visible in autocorrelation (0.25 sec of data). Carrier might be saturating. | ||
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| - | <note>Sattrack procedure in HMI | ||
| - | - power-off drives | ||
| - | - in settings, change UT1-UTC value (cureently -0.34) | ||
| - | - save | ||
| - | - load track into track2 (right side) | ||
| - | - power on and enable drives | ||
| - | - AzEl tab: select track2 as control and press track | ||
| - | </note> | ||
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| - | Saturday Nov 12 evening [[http://fourier.phys.utas.edu.au/wg7/317a_sum_bearb.txt|317a]]: tracking with Ho, Hb, Ke. Quasar recordings and tracking successful. No recordings during for Ho and Hb, Ke started late; so no overlap. Ho signal looked good an stable (S-band). Hb (x-band) highly variable (about 1 sec). Ke variable as well (in s-band) at high elevations. | ||
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| - | Sunday morning Nov 13, [[http://fourier.phys.utas.edu.au/wg7/317b_sum_bearb.txt|317b]]: ke overhead track, couldn't keep up at high elevations. Yg looked good, appeared to be stable throughout. Hb didn't look too good, weak and unstable at s-band, even at low elevation. | ||
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| - | Sunday night Nov 13, [[http://fourier.phys.utas.edu.au/wg7/318b_sum.txt|318b]]: three 12m antennas. Short hassles with the Ke elevation break not releasing, but tresolved before the track. All three tracks seem to be fine. It's becoming routine now. Good night, see you tomorrow morning. | ||
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| - | Monday morning Nov 14 [[http://fourier.phys.utas.edu.au/wg7/318c_sum.txt|318c]]: Hb, Ho, Ke. Hb and Ke went fine. Unfortunately sattrack didn't want to run on the 26m. | ||
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| - | Monday morning Nov 14 #2, [[http://fourier.phys.utas.edu.au/wg7/318d_sum.txt|318d]]: Ke, Yg. This time we use the AzEl data as provided by Jing directly. Tracking went well. Wrong frequencies during quasar tracking in Ke. Only last quasar should have correct freqs. Overhead track at Yg. Signal in x-band was pulsing, then at 20 deg hard pulsing. Lost the signal right as scheduled. However, the selwing took longer than scheduled, came back 16 sec late. | ||
/home/www/auscope/opswiki/data/attic/wg7/apod/observing_apod.1479445347.txt.gz · Last modified: 2016/11/18 05:02 by Andreas Hellerschmied
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