Session Notes for rd1606 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 RD1606, we were able to schedule all 33 sources in the astro mode of sked. 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. Kokee and Wettzell will observe INT I16201 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1606 Description R&D-07/2016 Scheduler: NASA Correlator: HAYS Start: 2016-201-17:30:00 End: 2016-202-17:30:00 Current yyyyddd: 2016201 (2016.55) ( 17589 MJD, TUES 19JUL.) Greenwich sidereal time: 13:21:45 (17:30:00 UT) Sun's RA and DEC: 7h 58.1m 20d 39.9 =========================================================== First observations Observation listing from file ./rd1606.skd for experiment RD1606 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Mc Ny T6 Wz 0716+714 16201-173000| 134 71 113 134 40 84| 1758-651 16201-173000| 40 40 | 0131-522 16201-173310| 40 40 | 1749+096 16201-173503| 40 40 40 40| 0454-463 16201-173525| 40 40 | 1736+324 16201-173746| 86 99 99 40 75| End of listing. =========================================================== Last observations Observation listing from file ./rd1606.skd for experiment RD1606 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Mc Ny T6 Wz 1123+264 16202-171313| 69 69 69 | 2145+082 16202-171510| 480 480 96 | 1104+728 16202-171628| 459 459| 1519-273 16202-171738| 44 44 | 1406-076 16202-172016| 102 102 | 0325+395 16202-172221| 40 40 | 1255-316 16202-172404| 68 68 | 0454+844 16202-172543| 40 40 | 1022+194 16202-172602| 164 164 123| 1803+784 16202-172734| 40 40 | 1057-797 16202-172824| 40 40 40 | End of listing. =========================================================== SKED Summary from file ./rd1606.skd for experiment RD1606 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 3.4 Min = 0.0 Max = 56.5 (Baseline Kk-T6 on 0454-463) RMS = 6.3 Total time: 1439 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Mc=MEDICINA Ny=NYALES20 T6=TIANMA65 Wz=WETTZELL Ft Hh Ho Kk Mc Ny T6 Wz Avg % obs. time: 20 36 42 42 53 54 21 47 39 % cal. time: 2 2 2 2 2 2 3 2 2 % slew time: 23 35 23 11 24 13 44 7 23 % idle time: 55 26 32 44 20 30 31 43 36 total # scans: 136 156 149 152 185 194 231 183 173 # scans/hour : 6 7 6 6 8 8 10 8 7 Avg scan (sec): 126 201 246 241 248 240 78 221 199 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TB(M5): 1.1 2.0 2.3 2.3 2.9 3.0 1.2 2.6 2.2 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Mc Ny T6 Wz Total -------------------------------------------------- Ft| 71 27 18 41 31 8 37 233 Hh| 59 0 49 26 52 41 298 Ho| 55 8 8 94 12 263 Kk| 33 53 95 38 292 Mc| 126 59 145 461 Ny| 78 129 451 T6| 56 442 Wz| 458 Number of 2-station scans: 232 Number of 3-station scans: 175 Number of 4-station scans: 57 Number of 5-station scans: 29 Number of 6-station scans: 4 Number of 7-station scans: 0 Number of 8-station scans: 0 Total number of scans: 497 Total number of obs: 1449 Total integrated obs-time: 256319 Average obs-time: 176.9 Histogram of observation durations Dur: 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500#Obs: | 492| 147| 89| 72| 56| 30| 73| 9| 43| 38| 48| 46| 40| 27| 19| 7| 14| 18| 181Average X-band SNRs by baseline | Ft Hh Ho Kk Mc Ny T6 Wz AVG ------------------------------------------------- Ft| 29 27 23 35 35 46 40 33 Hh| 26 - 37 33 51 40 36 Ho| 18 26 30 57 31 36 Kk| 25 26 56 32 35 Mc| 53 81 59 53 Ny| 69 61 52 T6| 100 67 Wz| 58 Average S-band SNRs by baseline | Ft Hh Ho Kk Mc Ny T6 Wz AVG ------------------------------------------------- Ft| 20 20 20 17 18 31 18 19 Hh| 25 - 21 20 32 21 23 Ho| 24 17 17 36 18 27 Kk| 22 21 45 24 30 Mc| 22 30 24 23 Ny| 25 23 22 T6| 35 35 Wz| 24 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode for: FORTLEZA HARTRAO HOBART26 KOKEE MEDICINA NYALES20 TIANMA65 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 ID Station Tape length Density Passes Ft FORTLEZA Mark5A Hh HARTRAO Mark5B Ho HOBART26 Mark5B Kk KOKEE Mark5B Mc MEDICINA Mark5B Ny NYALES20 Mark5B T6 TIANMA65 Mark5B Wz WETTZELL Mark5A =========================================================== 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 Ny T6 Ft Hh Ho Kk Mc Ny T6 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 Ny 20 20 20 20 20 Ny 15 15 15 15 15 T6 20 20 20 20 20 20 T6 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 ===========================================================