Session Notes for rd2201 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2201 will observe a total of 40 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 for all stations with an offset of 10 seconds. Wettzell (Wz) and Ishioka (Is) will observe INT I22012 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2201 Description R&D-01/2022 Scheduler: OSO Correlator: SHAO Start: 2022-012-18:00:00 End: 2022-013-18:00:00 Current yyyyddd: 2022012 (2022.03) ( 19592 MJD, WED. 12JAN.) Greenwich sidereal time: 01:28:50 (18:00:00 UT) Sun's RA and DEC: 19h 37.2m -21d 33.4 =========================================================== First observations Observation listing from file ./rd2201.skd for experiment RD2201 Source Start DURATIONS name yyddd-hhmmss Hh Is Kk Km Ma Ny Ns On Wz 0014+813 22012-180000| 42 40 40 175 193 63 222 222| 0812+367 22012-180140| 114 63 114 | 1738+499 22012-180410| 235 245 245 | NRAO190 22012-180517| 40 88 123 156 151 156| 0745+241 22012-180853| 165 243 54 283 139 283 129 139| End of listing. =========================================================== Last observations Observation listing from file ./rd2201.skd for experiment RD2201 Source Start DURATIONS name yyddd-hhmmss Hh Is Kk Km Ma Ny Ns On Wz 0256-005 22013-174150| 269 269 119 | 1738+476 22013-174534| 159 121 109 127 97 72 159| 1038+52B 22013-174858| 217 390 64 377 390 338 338 204| 0607-157 22013-175314| 43 166 166 148| 1738+499 22013-175649| 69 181 181 47 86 181 40| 1034-374 22013-175843| 67 67 | 0013-005 22013-175852| 58 58 58| End of listing. =========================================================== SKED Summary from file ./rd2201.skd for experiment RD2201 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 11.8 Min = 0.0 Max = 64.0 (Baseline Km-Wz on 0919-260) RMS = 7.8 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Is=ISHIOKA Kk=KOKEE Km=KUNMING Ma=MATERA Ny=NYALES20 Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Hh Is Kk Km Ma Ny Ns On Wz Avg % obs. time: 43 72 58 49 66 70 73 75 69 64 % cal. time: 2 3 3 4 3 3 2 2 3 3 % slew time: 37 5 16 37 21 19 1 13 8 18 % idle time: 17 19 23 9 9 7 23 8 18 15 total # scans: 192 243 239 317 227 302 177 210 269 241 # scans/hour : 8 10 10 13 9 13 7 9 11 10 Avg scan (sec): 192 257 208 134 251 200 354 308 222 236 # 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): 4.72 8.01 6.37 5.45 7.30 7.71 8.02 8.27 7.65 7.06 # OF OBSERVATIONS BY BASELINE | Hh Is Kk Km Ma Ny Ns On Wz Total ------------------------------------------------------- Hh| 58 0 125 150 79 41 106 137 696 Is| 153 195 77 162 93 90 98 926 Kk| 147 45 169 99 68 79 760 Km| 122 190 101 118 146 1144 Ma| 140 101 171 196 1002 Ny| 150 156 181 1227 Ns| 128 114 827 On| 176 1013 Wz| 1127 Number of 2-station scans: 73 Number of 3-station scans: 133 Number of 4-station scans: 116 Number of 5-station scans: 61 Number of 6-station scans: 49 Number of 7-station scans: 40 Number of 8-station scans: 36 Number of 9-station scans: 0 Total number of scans: 508 Total number of obs: 4361 Total integrated obs-time: 924205 Average obs-time: 211.9 Histogram of observation durations Dur: 35 70 105 140 175 210 245 280 315 350 385 420 455 490 525 560 595 630 665 700 735 #Obs: | 1058| 605| 546| 271| 286| 284| 153| 103| 143| 159| 160| 68| 80| 93| 49| 41| 25| 25| 17| 195| Average X-band SNRs by baseline | Hh Is Kk Km Ma Ny Ns On Wz AVG ------------------------------------------------------ Hh| 44 - 77 53 46 43 43 74 58 Is| 41 86 45 49 37 38 63 54 Kk| 48 35 41 31 32 49 41 Km| 68 62 42 51 87 67 Ma| 63 48 69 120 70 Ny| 62 63 92 61 Ns| 47 69 49 On| 102 61 Wz| 88 Average S-band SNRs by baseline | Hh Is Kk Km Ma Ny Ns On Wz AVG ------------------------------------------------------ Hh| 29 - 44 24 27 19 23 33 30 Is| 46 50 29 32 20 28 39 37 Kk| 58 45 43 28 41 55 46 Km| 37 42 25 34 48 43 Ma| 31 18 29 43 32 Ny| 23 32 43 35 Ns| 19 25 22 On| 42 31 Wz| 41 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO ISHIOKA KOKEE KUNMING MATERA NYALES20 NYALE13S ONSALA60 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 Km KUNMING Mark5B Ma MATERA Mark5B Ny NYALES20 Mark5B Ns NYALE13S 17650feet (Thin ) 33333 (Low ) 1 On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1 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 Is Kk Km Ma Ny Ns On Hh Is Kk Km Ma Ny Ns On Is 20 Is 15 Kk 20 20 Kk 15 15 Km 20 20 20 Km 15 15 15 Ma 20 20 20 20 Ma 15 15 15 15 Ny 20 20 20 20 20 Ny 15 15 15 15 15 Ns 20 20 20 20 20 20 Ns 15 15 15 15 15 15 On 20 20 20 20 20 20 20 On 15 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 15 ===========================================================