Session Notes for rd2001 PI: Patrick Charlot, Bordeaux Observatory =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The Laboratory d'Astrophysique de Bordeaux (LAB) subnmitted in 2012 a proposal to observe 195 ICRF2 transfer sources in the context of the GAIA mission. These sources were added to the GSFC monitoring program and 37 sources were scheduled in Gaia-dedicated R&D sessions. In February 2017, we studied the position uncertainties and the observation frequency of the 195 sources of the LAB proposal. Twenty-seven of these sources have a bad observation frequency: they were observed successfully in less than five sessions a year while the LAB requirement was twelve sessions a year. Most of these sources have bad uncertainties compared to the other sources of the set (larger than 50 microas). Three additional sources have good position uncertainties and an observation frequency of five to eleven successful sessions a year. However they are sources that were observed in previous Gaia-dedicated R&D sessions and the concern is that if they are not scheduled in coming dedicated R&D sessions, their observation frequency may drop. The sources scheduled in the Gaia-dedicated R&D sessions scheduled to observe after March 1st, 2017 are these thirty sources. When compared to the previous categories determined by the LAB, one source was in category 1, five sources were in category 2, five sources were in category 3 and nineteen sources were in category 4. In RD2001, we schedule 27 out of the thirty sources in the astro mode of sked. We use a maxscan value of 480 seconds. We use the sked flux catalog for all sources. The command fill is used with an offset of 10 seconds. We use a modified version of the 1Gbps wide-band mode currently used to schedule AOV sessions. Wettzell will observe INT I20015 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2001 Description R&D-01/2020 Scheduler: NASA Correlator: SHAO Start: 2020-015-18:00:00 End: 2020-016-18:00:00 Current yyyyddd: 2020015 (2020.04) ( 18864 MJD, WED. 15JAN.) Greenwich sidereal time: 01:38:38 (18:00:00 UT) Sun's RA and DEC: 19h 48.0m -21d 7.2 =========================================================== First observations Observation listing from file ./rd2001.skd for experiment RD2001 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Km Ny On Wz 0748+126 20015-180000| 40 57 40 77 59 77| 0016+731 20015-180305| 58 58 40 40| 0119+115 20015-180504| 163 128 163| 0308-611 20015-180507| 40 322 322 | 0241+622 20015-180855| 466 132 466 418 189| 0528-250 20015-181317| 95 192 192 103| 0410+110 20015-181740| 384 154 459 459 | 1215+303 20015-182310| 168 168 | 1330+476 20015-182651| 100 202 202 | 2329-415 20015-182804| 292 292 | End of listing. =========================================================== Last observations Observation listing from file ./rd2001.skd for experiment RD2001 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Km Ny On Wz 0312+100 20016-172833| 480 199 480 480| 1215+303 20016-173446| 66 66 | 1330+476 20016-173811| 218 222 222| 0528-250 20016-173937| 91 133 133 | 3C446 20016-174311| 350 350 40| 0522-611 20016-174347| 98 98 | 2145+082 20016-174416| 480 480| 0823-223 20016-174820| 40 194 194 | 0256-005 20016-175328| 201 94 40 191 201| 0537-441 20016-175521| 54 54 | 0458-020 20016-175726| 144 144 144 144 144| End of listing. =========================================================== SKED Summary from file ./rd2001.skd for experiment RD2001 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 8.4 Min = 0.0 Max = 54.3 (Baseline Ho-Wz on 2155-304) RMS = 10.0 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Km=KUNMING Ny=NYALES20 On=ONSALA60 Wz=WETTZELL Ft Hh Ho Km Ny On Wz Avg % obs. time: 41 53 54 57 70 62 69 58 % cal. time: 2 2 2 3 3 2 3 2 % slew time: 26 42 26 26 13 14 8 23 % idle time: 30 2 17 13 13 21 20 17 total # scans: 166 173 175 243 219 214 225 202 # scans/hour : 7 7 7 10 9 9 9 8 Avg scan (sec): 213 266 268 203 278 249 263 248 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 4.53 5.90 6.00 6.33 7.78 6.81 7.58 6.42 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Km Ny On Wz Total --------------------------------------------- Ft| 71 60 24 53 79 77 364 Hh| 106 101 34 34 56 402 Ho| 114 21 8 14 323 Km| 125 102 107 573 Ny| 174 171 578 On| 172 569 Wz| 597 Number of 2-station scans: 110 Number of 3-station scans: 212 Number of 4-station scans: 97 Number of 5-station scans: 21 Number of 6-station scans: 11 Number of 7-station scans: 0 Total number of scans: 451 Total number of obs: 1703 Total integrated obs-time: 383114 Average obs-time: 225.0 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: | 374| 132| 99| 117| 97| 78| 32| 54| 34| 36| 61| 41| 28| 47| 42| 35| 25| 47| 324| Average X-band SNRs by baseline | Ft Hh Ho Km Ny On Wz AVG -------------------------------------------- Ft| 35 34 45 40 43 55 42 Hh| 42 45 38 37 48 41 Ho| 57 34 32 36 45 Km| 78 67 96 68 Ny| 75 109 79 On| 96 72 Wz| 89 Average S-band SNRs by baseline | Ft Hh Ho Km Ny On Wz AVG -------------------------------------------- Ft| 27 28 33 23 24 29 27 Hh| 32 38 25 22 29 31 Ho| 39 17 17 26 32 Km| 50 44 61 46 Ny| 37 50 41 On| 44 37 Wz| 45 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: FORTLEZA Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:2 1024 Mbits 128 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 16.00 MHz 1 16(*2) 32 X-band spanned bw= 720.0 MHz rms spanned bw= 275.0 MHz S-band spanned bw= 88.0 MHz rms spanned bw= 30.9 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 19.13 11.48 30.61 Recording mode for: HARTRAO HOBART26 KUNMING NYALES20 ONSALA60 WETTZELL Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 1024 Mbits 256 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 16.00 MHz 1 32(*1) 32 X-band spanned bw= 720.0 MHz rms spanned bw= 275.0 MHz S-band spanned bw= 88.0 MHz rms spanned bw= 30.9 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 Km KUNMING Mark5B Ny NYALES20 Mark5B On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 14 Wz WETTZELL Mark5B =========================================================== 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 Km Ny On Ft Hh Ho Km Ny On Hh 20 Hh 15 Ho 20 20 Ho 15 15 Km 20 20 20 Km 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 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15 ===========================================================