Session Notes for rd1612 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 RD1612, we were able to schedule all 33 sources in the astro mode of sked. We used a maxscan value of 480 seconds. 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. Wettzell will observe INT K16348 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1612 Description R&D-12/2016 Scheduler: NASA Correlator: HAYS Start: 2016-348-17:30:00 End: 2016-349-17:30:00 Current yyyyddd: 2016348 (2016.95) ( 17736 MJD, TUES 13DEC.) Greenwich sidereal time: 23:01:18 (17:30:00 UT) Sun's RA and DEC: 17h 25.8m -23d 12.2 =========================================================== First observations Observation listing from file ./rd1612.skd for experiment RD1612 Source Start DURATIONS name yyddd-hhmmss Hh Ho Kb Ma Ny On T6 Wz 0420+022 16348-173000| 87 91 40 88 71 91 40 52| 0059+581 16348-173507| 40 40 40 40 40 40| 2353-686 16348-173539| 40 40 | 1418+546 16348-173936| 40 40 40 40 40 40| 0522-611 16348-174042| 145 145 | End of listing. =========================================================== End of listing. Last observations Observation listing from file ./rd1612.skd for experiment RD1612 Source Start DURATIONS name yyddd-hhmmss Hh Ho Kb Ma Ny On T6 Wz 0211+171 16349-170707| 480 480 154 | 0241+622 16349-171236| 84 59 84 40 45| 0410+110 16349-171723| 480 480 286 40 427| 0202+319 16349-172022| 40 40 40 40 | 0119+041 16349-172331| 71 40 93 93 | 2353+816 16349-172659| 40 158 109 158 83| 0454-463 16349-172900| 40 40 40 | End of listing. =========================================================== SKED Summary from file ./rd1612.skd for experiment RD1612 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 4.3 Min = 0.0 Max = 45.0 (Baseline Hh-Ny on 1741-038) RMS = 6.6 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Ho=HOBART26 Kb=KASHIM34 Ma=MATERA Ny=NYALES20 On=ONSALA60 T6=TIANMA65 Wz=WETTZELL Hh Ho Kb Ma Ny On T6 Wz Avg % obs. time: 36 37 46 40 53 35 18 48 39 % cal. time: 2 2 2 2 2 2 3 3 2 % slew time: 32 18 25 19 12 16 46 8 22 % idle time: 30 42 26 37 32 46 33 40 36 total # scans: 148 131 172 212 197 202 235 216 189 # scans/hour : 6 5 7 9 8 8 10 9 8 Avg scan (sec): 209 246 230 164 232 149 65 191 185 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TB(M5): 2.0 2.1 2.5 2.2 2.9 1.9 1.0 2.6 2.2 # OF OBSERVATIONS BY BASELINE | Hh Ho Kb Ma Ny On T6 Wz Total -------------------------------------------------- Hh| 47 36 64 36 59 57 71 370 Ho| 82 12 26 11 98 13 289 Kb| 40 72 34 152 51 467 Ma| 107 167 65 145 600 Ny| 116 86 131 574 On| 57 124 568 T6| 70 585 Wz| 605 Number of 2-station scans: 162 Number of 3-station scans: 147 Number of 4-station scans: 99 Number of 5-station scans: 41 Number of 6-station scans: 9 Number of 7-station scans: 11 Number of 8-station scans: 2 Total number of scans: 471 Total number of obs: 2029 Total integrated obs-time: 294161 Average obs-time: 145.0 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: | 850| 249| 148| 109| 34| 62| 57| 24| 54| 40| 48| 53| 13| 16| 29| 13| 25| 30| 175 Average X-band SNRs by baseline | Hh Ho Kb Ma Ny On T6 Wz AVG ------------------------------------------------- Hh| 28 31 39 32 32 79 41 42 Ho| 30 27 27 24 61 31 40 Kb| 36 41 41 111 47 61 Ma| 49 48 120 64 58 Ny| 45 88 55 52 On| 126 61 55 T6| 126 100 Wz| 64 Average S-band SNRs by baseline | Hh Ho Kb Ma Ny On T6 Wz AVG ------------------------------------------------- Hh| 25 21 21 19 18 41 23 24 Ho| 28 22 21 17 44 24 31 Kb| 22 24 21 61 27 37 Ma| 19 18 50 23 23 Ny| 18 38 22 23 On| 53 22 22 T6| 51 50 Wz| 26 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode for: HARTRAO HOBART26 KASHIM34 MATERA NYALES20 ONSALA60 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 =========================================================== 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) Hh Ho Kb Ma Ny On T6 Hh Ho Kb Ma Ny On T6 Ho 20 Ho 15 Kb 20 20 Kb 15 15 Ma 20 20 20 Ma 15 15 15 Ny 20 20 20 20 Ny 15 15 15 15 On 20 20 20 20 20 On 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 ===========================================================