Session Notes for rd2309 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2309 will observe a total of 55 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. Wettzell (Wz) and Kokee (Kk) will observe INT I23333 during the time from 1715 UT to 1845 UT and INT II3333 during the time from 2315 UT to 0045 UT. The fill command was used for all stations except Ns using a fill offset of 10 seconds. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2309 Description R&D-11/2023 Scheduler: OSO Correlator: SHAO Start: 2023-333-18:00:00 End: 2023-334-18:00:00 Current yyyyddd: 2023333 (2023.91) ( 20278 MJD, WED. 29NOV.) Greenwich sidereal time: 22:33:27 (18:00:00 UT) Sun's RA and DEC: 16h 21.7m -21d 31.0 =========================================================== First observations Observation listing from file ./rd2309.skd for experiment RD2309 Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ns On Wz 2136+141 23333-180000| 151 220 193 151 220 | 1633+38 23333-180455| 64 134 64 134 | 0116-219 23333-180936| 157 66 169 169 | 0234+285 23333-181400| 47 109 53 109 | 0426+273 23333-181657| 98 144 175 175 | 0306+102 23333-182038| 201 274 297 297 | 0309+411 23333-182634| 596 720 720 720 | 0010+405 23333-183935| 720 720 720 612 | 1738+499 23333-185328| 151 151 134 151 138 151| 1842+681 23333-185648| 720 430 416 720 429 444| End of listing. =========================================================== Last observations Observation listing from file ./rd2309.skd for experiment RD2309 Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ns On Wz 0234+285 23334-165938| 47 137 53 199| 2254+074 23334-170346| 720 268 369 720 401 422| 0237+040 23334-171133| 197 287 284 307| 0010+405 23334-171740| 720 318 592 720 720 452| 0138-097 23334-172615| 42 121| 0306+102 23334-172852| 62 195 269| 2150+173 23334-173416| 720 366 429 720 474 484| 0013-005 23334-174302| 164 198 222 241| 2254+074 23334-174738| 720 268 339 720 370 386| 0138-097 23334-175448| 93 128 152 171| 0306+102 23334-175816| 104 104 104 104| End of listing. =========================================================== SKED Summary from file ./rd2309.skd for experiment RD2309 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 5.9 Min = 0.0 Max = 65.5 (Baseline Kk-Ns on 2106+143) RMS = 4.5 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Kk=KOKEE Ma=MATERA Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Ft Hh Kk Ma Ns On Wz Avg % obs. time: 64 41 34 70 70 77 68 61 % cal. time: 1 2 1 3 2 2 3 2 % slew time: 16 27 5 21 1 13 9 14 % idle time: 18 29 58 5 27 7 19 24 total # scans: 129 147 116 218 140 199 270 174 # scans/hour : 5 6 5 9 6 8 11 7 Avg scan (sec): 428 243 255 277 432 333 217 311 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 7.07 4.56 3.79 7.72 7.74 8.48 7.51 6.70 # OF OBSERVATIONS BY BASELINE | Ft Hh Kk Ma Ns On Wz Total --------------------------------------------- Ft| 64 40 112 89 110 115 530 Hh| 0 115 52 104 131 466 Kk| 78 61 68 115 362 Ma| 123 188 202 818 Ns| 126 126 577 On| 182 778 Wz| 871 Number of 2-station scans: 39 Number of 3-station scans: 59 Number of 4-station scans: 60 Number of 5-station scans: 74 Number of 6-station scans: 59 Number of 7-station scans: 0 Total number of scans: 291 Total number of obs: 2201 Total integrated obs-time: 631991 Average obs-time: 287.1 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: | 283| 177| 212| 234| 145| 114| 92| 122| 105| 90| 84| 64| 65| 42| 62| 57| 30| 18| 16| 189| Average X-band SNRs by baseline | Ft Hh Kk Ma Ns On Wz AVG -------------------------------------------- Ft| 53 34 44 36 40 55 45 Hh| - 73 54 68 98 74 Kk| 45 38 45 66 49 Ma| 60 85 127 81 Ns| 63 72 57 On| 122 78 Wz| 96 Average S-band SNRs by baseline | Ft Hh Kk Ma Ns On Wz AVG -------------------------------------------- Ft| 27 37 21 14 20 27 23 Hh| - 32 18 31 41 32 Kk| 41 27 43 62 45 Ma| 19 33 48 34 Ns| 20 24 20 On| 49 34 Wz| 43 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: FORTLEZA Mode Tot.Rate #Chan Chan.BW Tot.BW #BBC #bits Tracks*(fan) Tot.tracks Barrel Mk341:2 1024 Mbps 16 16 Mhz 256 Mhz 14 2 32*(2) 64 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 Recording mode for: HARTRAO KOKEE MATERA 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 Ft FORTLEZA Mark5A Hh HARTRAO Mark5B Kk KOKEE Mark5B Ma MATERA 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) Ft Hh Kk Ma Ns On Ft Hh Kk Ma Ns On Hh 20 Hh 15 Kk 20 20 Kk 15 15 Ma 20 20 20 Ma 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 ===========================================================