Session Notes for rd2210 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2210 will observe a total of 45 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. Seven sources were scheduled using flux density values from BVID (missing from the sked flux catalog). Fifteen sources do not satisfy condition (iv) but were scheduled to increase the number of sources common with sources observed with Gaia. Wettzell (Wz) and Kokee (Kk) will observe INT I22341 during the time from 1815 UT to 1945 UT. The fill command was used for all stations using a fill offset of 10 seconds. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2210 Description R&D-12/2022 Scheduler: OSO Correlator: SHAO Start: 2022-341-18:00:00 End: 2022-342-18:00:00 Current yyyyddd: 2022341 (2022.93) ( 19921 MJD, WED. 7DEC.) Greenwich sidereal time: 23:05:57 (18:00:00 UT) Sun's RA and DEC: 16h 57.5m -22d 39.5 =========================================================== First observations Observation listing from file ./rd2210.skd for experiment RD2210 Source Start DURATIONS name yyddd-hhmmss Hh Is Kk Mc Ns On Wz 1637+574 22341-180000| 448 448 40 226 166 199| 0123+257 22341-180430| 229 148 229 191 212| 0620+389 22341-180854| 462 366 139 462 223 239| 0106+013 22341-181346| 40 107 107 74| 0406+121 22341-181719| 556 720 599 720 720 | 0237-027 22341-182834| 52 52 | End of listing. =========================================================== Last observations Observation listing from file ./rd2210.skd for experiment RD2210 Source Start DURATIONS name yyddd-hhmmss Hh Is Kk Mc Ns On Wz 2357-318 22342-174452| 56 133 133| 1055+018 22342-174550| 40 40 | 1101-325 22342-174713| 64 64 | 2136+141 22342-174854| 40 95 175 154 175| 1319-093 22342-174910| 42 42 | 0754+100 22342-175124| 506 506 | 0048-097 22342-175234| 109 188 262 262| 2029+121 22342-175808| 102 102 102 102 102| End of listing. =========================================================== SKED Summary from file ./rd2210.skd for experiment RD2210 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 10.5 Min = 0.0 Max = 58.8 (Baseline Is-On on 1319-093) RMS = 8.9 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Is=ISHIOKA Kk=KOKEE Mc=MEDICINA Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Hh Is Kk Mc Ns On Wz Avg % obs. time: 34 69 49 56 69 75 71 61 % cal. time: 2 2 2 3 2 2 3 2 % slew time: 34 4 10 35 1 14 8 16 % idle time: 29 24 38 5 27 7 17 21 total # scans: 165 210 158 238 159 206 253 198 # scans/hour : 7 9 7 10 7 9 11 8 Avg scan (sec): 179 283 268 205 374 316 244 266 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 3.78 7.62 5.41 6.24 7.62 8.34 7.89 6.70 # OF OBSERVATIONS BY BASELINE | Hh Is Kk Mc Ns On Wz Total --------------------------------------------- Hh| 61 0 146 54 102 145 508 Is| 121 117 95 124 125 643 Kk| 60 82 78 79 420 Mc| 111 179 221 834 Ns| 133 115 590 On| 179 795 Wz| 864 Number of 2-station scans: 85 Number of 3-station scans: 68 Number of 4-station scans: 68 Number of 5-station scans: 91 Number of 6-station scans: 48 Number of 7-station scans: 0 Total number of scans: 360 Total number of obs: 2327 Total integrated obs-time: 562571 Average obs-time: 241.8 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: | 527| 232| 238| 167| 181| 162| 90| 44| 87| 65| 42| 72| 73| 70| 36| 26| 40| 19| 28| 128| Average X-band SNRs by baseline | Hh Is Kk Mc Ns On Wz AVG -------------------------------------------- Hh| 71 - 73 48 65 108 78 Is| 65 60 59 57 97 68 Kk| 40 43 40 61 52 Mc| 92 116 188 111 Ns| 98 144 87 On| 180 104 Wz| 142 Average S-band SNRs by baseline | Hh Is Kk Mc Ns On Wz AVG -------------------------------------------- Hh| 44 - 37 26 34 49 40 Is| 75 39 29 37 54 47 Kk| 56 39 51 69 60 Mc| 28 44 65 46 Ns| 29 41 32 On| 62 44 Wz| 57 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO ISHIOKA KOKEE MEDICINA 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 Mc MEDICINA 17640feet (Thin ) 56250 (HIGH ) 1 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 Mc Ns On Hh Is Kk Mc Ns On Is 20 Is 15 Kk 20 20 Kk 15 15 Mc 20 20 20 Mc 15 15 15 Ns 20 20 20 20 Ns 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 ===========================================================