Session Notes for rd2107 Prepared by K. Le Bail, GEO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2107 will observe a total of 63 optically-bright ICRF3 sources selected from the Gaia Data Release 2 catalog with the following criteria: (i) relatively compact VLBI structure (structure index < 3), (ii) stronger than 0.25 Jy at X and S band, (iii) not observed in any of the IVS sessions during the past 30 days (excluding the intensive sessions), (iv) observed at least 6 times since August 2014 (beginning of the Gaia operations) and with no gap longer than two years. The optical magnitude of the sources ranges from 16.0 to 20.0. The goal is to improve the overall temporal coverage of the observations by IVS of those optically-bright ICRF3 sources during the Gaia operations. The command fill is used with an offset of 10 seconds. Wettzell and Kokee will observe INT I21265 during the time from 1815 UT to 1945 UT. Nyale13s (Ns), Ny-Alesund (Ny), Ishioka (Is), and Wettzell (Wz) are tagged along. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2107 Description R&D-09/2021 Scheduler: OSO Correlator: SHAO Start: 2021-265-14:00:00 End: 2021-266-14:00:00 Current yyyyddd: 2021265 (2021.73) ( 19480 MJD, WED. 22SEP.) Greenwich sidereal time: 14:06:37 (14:00:00 UT) Sun's RA and DEC: 11h 59.2m 0d 5.1 =========================================================== First observations Observation listing from file ./rd2107.skd for experiment RD2107 Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma On Sh Wz Ns Ny Is 1849+670 21265-140000| 90 40 51 48 77 90 63 79| 1633+38 21265-140205| 278 40 67 40 100 132 70 278| 0814+425 21265-140455| 400 90 147 448 448 144 | 1725+123 21265-140904| 182 155 182 78 181 166| 2234+282 21265-141318| 290 74 110 136 137 323 292 323| 1511-100 21265-141634| 111 40 81 111 | End of listing. =========================================================== Last observations Observation listing from file ./rd2107.skd for experiment RD2107 Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma On Sh Wz Ns Ny Is 2000+472 21266-131610| 480 68 107 40 40 480 480| 1514+197 21266-131915| 322 378 378 348 143 | 1758+388 21266-132719| 63 106 133 105 56 142 142| 1608+243 21266-133033| 321 362 367 373 143 373 | 1725+123 21266-133743| 248 155 184 159 83 191 248| 0954+658 21266-134235| 480 40 43 45 40 44 480| 1800+440 21266-134507| 212 262 282 278 81 282 | 1743+173 21266-135053| 75 115 134 133 40 134 | 1758+388 21266-135407| 112 104 104 108 55 111 112| 2201+315 21266-135702| 40 168 40 40 168 168 168| 0309+411 21266-135839| 71 71 71 | End of listing. =========================================================== SKED Summary from file ./rd2107.skd for experiment RD2107 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 6.8 Min = 0.0 Max = 92.9 (Baseline On-Sh on 0414-189) RMS = 8.1 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Ma=MATERA On=ONSALA60 Sh=SESHAN25 Wz=WETTZELL Ns=NYALE13S Ny=NYALES20 Is=ISHIOKA Hh Kk Ma On Sh Wz Ns Ny Is Avg % obs. time: 37 36 64 71 52 72 9 67 40 50 % cal. time: 2 1 4 4 4 3 0 3 2 2 % slew time: 30 4 24 18 34 6 0 11 3 15 % idle time: 30 58 7 6 9 18 90 18 55 33 total # scans: 194 117 311 308 309 282 27 239 134 213 # scans/hour : 8 5 13 13 13 12 1 10 6 9 Avg scan (sec): 166 263 177 200 146 220 290 242 255 217 # data tracks: 32 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 32 Total TB(M5): 4.12 3.93 7.05 7.90 5.77 7.93 1.00 7.41 4.38 5.50 # OF OBSERVATIONS BY BASELINE | Hh Kk Ma On Sh Wz Ns Ny Is Total ------------------------------------------------------- Hh| 0 189 170 180 171 6 113 51 880 Kk| 98 114 107 101 15 105 77 617 Ma| 291 285 277 26 224 126 1516 On| 282 272 27 237 129 1522 Sh| 260 25 223 132 1494 Wz| 24 212 123 1440 Ns| 27 22 172 Ny| 116 1257 Is| 776 Number of 2-station scans: 5 Number of 3-station scans: 19 Number of 4-station scans: 32 Number of 5-station scans: 69 Number of 6-station scans: 106 Number of 7-station scans: 87 Number of 8-station scans: 17 Number of 9-station scans: 0 Total number of scans: 335 Total number of obs: 4837 Total integrated obs-time: 805327 Average obs-time: 166.5 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| 503| 531| 498| 480| 379| 218| 137| 157| 114| 91| 182| 154| 89| 88| 56| 43| 41| 226| Average X-band SNRs by baseline | Hh Kk Ma On Sh Wz Ns Ny Is AVG ------------------------------------------------------ Hh| - 44 37 57 67 85 56 50 52 Kk| 42 38 53 71 70 68 59 55 Ma| 58 66 108 56 76 52 68 On| 56 98 64 78 46 63 Sh| 94 74 85 89 72 Wz| 113 124 85 96 Ns| 152 85 89 Ny| 81 86 Is| 68 Average S-band SNRs by baseline | Hh Kk Ma On Sh Wz Ns Ny Is AVG ------------------------------------------------------ Hh| - 25 22 30 35 67 28 32 28 Kk| 36 35 43 59 87 56 68 50 Ma| 26 28 41 36 31 29 31 On| 25 39 39 32 26 29 Sh| 37 39 34 40 32 Wz| 69 47 44 42 Ns| 72 62 56 Ny| 41 38 Is| 40 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO ISHIOKA KOKEE MATERA NYALES20 NYALE13S ONSALA60 SESHAN25 WETTZELL Mode Tot.Rate #Chan Chan.BW Tot.BW #BBC #bits Tracks*(fan) Tot.tracks Barrel Mk341:1 1024 Mbps 16 16 Mhz 256 Mhz 14 2 32*(1) 32 NONE 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 Speed Hh HARTRAO Mark5B Is ISHIOKA K5 Kk KOKEE Mark5B Ma MATERA Mark5B Ny NYALES20 Mark5B Ns NYALE13S 17650feet (Thin ) 33333 (Low ) 1 On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1 Sh SESHAN25 Mark5B Wz WETTZELL 17640feet (Thin ) 56250 (HIGH ) 1 =========================================================== 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 Kk Ma On Sh Wz Ns Ny Hh Kk Ma On Sh Wz Ns Ny Kk 20 Kk 15 Ma 20 20 Ma 15 15 On 20 20 20 On 15 15 15 Sh 20 20 20 20 Sh 15 15 15 15 Wz 20 20 20 20 20 Wz 15 15 15 15 15 Ns 20 20 20 20 20 20 Ns 15 15 15 15 15 15 Ny 20 20 20 20 20 20 20 Ny 15 15 15 15 15 15 15 Is 20 20 20 20 20 20 20 20 Is 15 15 15 15 15 15 15 15 ===========================================================