Session Notes for rd1607 =========================================================== Prepared by K. Le Bail, NVI, Inc./GSFC PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal - Observation of : - 1 source in category 1 and 2 sources in category 2 with bad position uncertainties, - 1 source in category 1 and 4 sources in category 2 that were poorly observed in the past 24 months, - 1 source in category 3 that was not observed in the past 12 months, - 24 sources in category 4. The Laboratory d'Astrophysique de Bordeaux (LAB) subnmitted a proposal to observe 195 ICRF2 transfer sources in the context of the GAIA mission. Those 195 sources are divided in four categories. The forth category contains 24 sources which are not part of the IVS monitoring program and which have a poor position accuracy. The goal in observing them in R&D sessions is to improve their position accuracy. We noticed one source in category 1 and two sources in category 2 have position uncertainties between 100 and 200 microas. They will be observed in this session to improve their uncertainties. Also, five sources in categories 1 and 2 have been poorly observed in the past 24 months, and one source in category 3 was not observed at all in the past 12 months. This is probably due to the fact these sources are weak or they are in the Southern hemisphere. In RD1607, we were able to schedule only 25 out of the 33 sources total in the astro mode of sked, due to the session network. We used a maxscan value of 800 seconds to increase the number of sources scheduled. Forty of the good geodetic sources are used as base of a stable sources set and uniform sky coverage. We use the sked flux catalog for all sources. Ny Alesund (Ny) has been tagged along as it was on a maintenance period from August 9 to August 21, maintenance period which could have be extended by the time of RD1607. Kokee and Wettzell will observe INT I16237 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1607 Description R&D-07/2016 Scheduler: NASA Correlator: HAYS Start: 2016-237-18:00:00 End: 2016-238-18:00:00 Current yyyyddd: 2016237 (2016.65) ( 17625 MJD, WED. 24AUG.) Greenwich sidereal time: 16:13:46 (18:00:00 UT) Sun's RA and DEC: 10h 15.9m 10d 45.9 =========================================================== First observations Observation listing from file ./rd1607.skd for experiment RD1607 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Mc On Wz Ny 1334-127 16237-180000| 40 40 40 40 40 | 0202+319 16237-180237| 40 40 40 | 0814+425 16237-180254| 46 46 46| 1144+402 16237-180538| 181 181 77 161 61 | 2239+096 16237-180747| 89 59 89 89| End of listing. =========================================================== Last observations Observation listing from file ./rd1607.skd for experiment RD1607 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Mc On Wz Ny 0241+622 16238-173505| 69 69 51 63| 1622-253 16238-174027| 143 59 70 143 59 | 1936-155 16238-174427| 94 92 94 72 | 2239+096 16238-174855| 196 128 280 280 220 | 0454-463 16238-175353| 40 40 | 1736+324 16238-175624| 146 159 159 119 159| 0823-223 16238-175640| 191 128 191 | End of listing. =========================================================== SKED Summary from file ./rd1607.skd for experiment RD1607 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 3.6 Min = 0.0 Max = 68.6 (Baseline Ft-Kk on 0454-463) RMS = 7.1 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Mc=MEDICINA On=ONSALA60 Wz=WETTZELL Ny=NYALES20 Ft Hh Ho Kk Mc On Wz Ny Avg % obs. time: 30 53 51 50 61 46 53 55 50 % cal. time: 1 2 2 2 2 2 2 2 2 % slew time: 15 32 23 9 23 11 6 9 17 % idle time: 53 12 24 38 13 40 38 33 32 total # scans: 105 150 144 131 166 148 170 141 144 # scans/hour : 4 6 6 5 7 6 7 6 6 Avg scan (sec): 244 304 306 333 317 270 268 337 296 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TB(M5): 1.6 2.9 2.8 2.8 3.4 2.6 2.9 3.0 2.8 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Mc On Wz Ny Total -------------------------------------------------- Ft| 64 25 14 46 54 42 31 276 Hh| 55 0 78 57 75 50 379 Ho| 71 15 15 15 15 211 Kk| 42 45 51 53 276 Mc| 116 147 120 564 On| 116 99 502 Wz| 117 563 Ny| 485 Number of 2-station scans: 136 Number of 3-station scans: 68 Number of 4-station scans: 68 Number of 5-station scans: 55 Number of 6-station scans: 22 Number of 7-station scans: 0 Number of 8-station scans: 0 Total number of scans: 349 Total number of obs: 1628 Total integrated obs-time: 471811 Average obs-time: 289.8 Histogram of observation durations Dur: 40 80 120 160 200 240 280 320 360 400 440 480 520 560 600 640 680 720 760 800#Obs: | 579| 144| 98| 89| 46| 34| 40| 15| 33| 17| 66| 49| 67| 41| 51| 20| 19| 50| 170Average X-band SNRs by baseline | Ft Hh Ho Kk Mc On Wz Ny AVG ------------------------------------------------- Ft| 31 25 21 40 31 44 33 33 Hh| 32 - 41 34 46 39 38 Ho| 24 29 27 33 31 28 Kk| 28 25 32 30 27 Mc| 55 67 49 51 On| 63 45 46 Wz| 54 55 Ny| 45 Average S-band SNRs by baseline | Ft Hh Ho Kk Mc On Wz Ny AVG ------------------------------------------------- Ft| 22 23 22 21 17 23 16 20 Hh| 31 - 25 21 26 22 25 Ho| 24 20 17 19 17 24 Kk| 28 25 29 27 26 Mc| 25 30 21 25 On| 26 19 22 Wz| 22 26 Ny| 21 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode for: FORTLEZA HARTRAO HOBART26 KOKEE MEDICINA NYALES20 ONSALA60 WETTZELL Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 512 Mbits 128 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 8.00 MHz 1 32(*1) 32 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 140.0 MHz rms spanned bw= 50.9 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 19.13 11.48 30.61 =========================================================== Tape types =========================================================== SNR targets Minimum SNR by baseline for multi-baseline scans X-band (margin 0) S-band (margin 0) X-band (ast_margin 0) S-band (ast_margin 0) Ft Hh Ho Kk Mc On Wz Ft Hh Ho Kk Mc On Wz Hh 20 Hh 15 Ho 20 20 Ho 15 15 Kk 20 20 20 Kk 15 15 15 Mc 20 20 20 20 Mc 15 15 15 15 On 20 20 20 20 20 On 15 15 15 15 15 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15 Ny 20 20 20 20 20 20 20 Ny 15 15 15 15 15 15 15 ===========================================================