Session Notes for rd2310 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2310 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 I23347 during the time from 1715 UT to 1845 UT and INT II3347 during the time from 2315 UT to 0045 UT. Kunming (Km) is added in tagalong mode for testing purposes. The fill command was used for all stations using a fill offset of 10 seconds. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2310 Description R&D-12/2023 Scheduler: OSO Correlator: SHAO Start: 2023-347-18:00:00 End: 2023-348-18:00:00 Current yyyyddd: 2023347 (2023.95) ( 20292 MJD, WED. 13DEC.) Greenwich sidereal time: 23:28:39 (18:00:00 UT) Sun's RA and DEC: 17h 22.8m -23d 9.6 =========================================================== First observations Observation listing from file ./rd2310.skd for experiment RD2310 Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma Ns On Wz Km 0235+164 23347-180000| 40 158 209 209 40| 2144+092 23347-180446| 113 56 113 74 | NRAO512 23347-180714| 45 59 59 | 1044+719 23347-180918| 40 40 40 40| 0016+731 23347-181106| 78 78 65 40| 1738+476 23347-181336| 78 110 110 | 0009+081 23347-181652| 518 457 518 496 | 2029+121 23347-182605| 41 67 67 | 0642+449 23347-182901| 40 40 40 40| 0814+425 23347-183034| 51 146 146 40| End of listing. =========================================================== Last observations Observation listing from file ./rd2310.skd for experiment RD2310 Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma Ns On Wz Km 0814+425 23348-172143| 62 51 75 65 75 40| 0620+389 23348-172333| 362 336 362 339 153 101| 0524+034 23348-172635| 208 208 40| 1726+455 23348-173108| 591 199 591 255 297 | 0422+004 23348-173713| 40 160 161 161 40| 0009+081 23348-174135| 249 436 496 496 319 | 0048-097 23348-174734| 158 158 | 0805+410 23348-175112| 424 79 424 99 122 45| 0420-014 23348-175400| 40 74 90 90 40| 0524+034 23348-175621| 121 84 92 121 40| 0642+449 23348-175901| 59 59 59 59 59 40| End of listing. =========================================================== SKED Summary from file ./rd2310.skd for experiment RD2310 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 9.3 Min = 0.0 Max = 84.7 (Baseline Hh-On on 1519-273) RMS = 7.6 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Ma=MATERA Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Km=KUNMING Hh Kk Ma Ns On Wz Km Avg % obs. time: 34 41 65 69 73 64 20 52 % cal. time: 2 2 3 3 3 4 3 3 % slew time: 39 6 26 2 18 10 30 19 % idle time: 24 50 5 26 5 21 47 26 total # scans: 201 134 264 216 272 308 226 231 # scans/hour : 8 6 11 9 11 13 9 10 Avg scan (sec): 145 263 212 276 231 181 76 197 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 3.72 4.52 7.17 7.64 8.05 7.12 2.19 5.77 # OF OBSERVATIONS BY BASELINE | Hh Kk Ma Ns On Wz Km Total --------------------------------------------- Hh| 0 153 84 146 179 131 693 Kk| 92 115 109 120 83 519 Ma| 181 239 231 173 1069 Ns| 201 181 144 906 On| 229 194 1118 Wz| 187 1127 Km| 912 Number of 2-station scans: 29 Number of 3-station scans: 47 Number of 4-station scans: 62 Number of 5-station scans: 122 Number of 6-station scans: 94 Number of 7-station scans: 0 Total number of scans: 354 Total number of obs: 3172 Total integrated obs-time: 497847 Average obs-time: 157.0 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: | 1231| 432| 250| 228| 223| 148| 137| 119| 88| 63| 55| 34| 23| 19| 16| 6| 10| 7| 11| 72| Average X-band SNRs by baseline | Hh Kk Ma Ns On Wz Km AVG -------------------------------------------- Hh| - 79 44 58 113 97 83 Kk| 45 68 48 67 68 60 Ma| 86 109 235 92 120 Ns| 93 152 77 93 On| 167 79 100 Wz| 129 153 Km| 93 Average S-band SNRs by baseline | Hh Kk Ma Ns On Wz Km AVG -------------------------------------------- Hh| - 39 24 35 53 53 43 Kk| 52 51 58 71 82 62 Ma| 24 40 88 46 50 Ns| 28 39 29 32 On| 59 42 43 Wz| 59 62 Km| 50 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO KOKEE KUNMING 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 Hh HARTRAO Mark5B Kk KOKEE Mark5B Km KUNMING 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) Hh Kk Ma Ns On Wz Hh Kk Ma Ns On Wz Kk 20 Kk 15 Ma 20 20 Ma 15 15 Ns 20 20 20 Ns 15 15 15 On 20 20 20 20 On 15 15 15 15 Wz 20 20 20 20 20 Wz 15 15 15 15 15 Km 20 20 20 20 20 20 Km 15 15 15 15 15 15 ===========================================================