Session Notes for rd2206 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2206 will observe a total of 62 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 Kokee (Kk) will observe INT I22180 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2206 Description R&D-07/2022 Scheduler: OSO Correlator: WASH Start: 2022-180-18:00:00 End: 2022-181-18:00:00 Current yyyyddd: 2022180 (2022.49) ( 19760 MJD, WED. 29JUN.) Greenwich sidereal time: 12:31:11 (18:00:00 UT) Sun's RA and DEC: 6h 34.7m 23d 11.7 =========================================================== First observations Observation listing from file ./rd2206.skd for experiment RD2206 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny Ns On Wz 1633+38 22180-180000| 130 40 76 130 88 116| 0014+813 22180-180246| 116 59 40 138 48 138| 0812+367 22180-180552| 80 67 80 90 82 90| 0707+476 22180-180757| 202 178 201 203 198 203| 0745+241 22180-181203| 177 173 480 480 480 177| 1147+245 22180-182151| 86 116 150 150 136 | 1236+077 22180-182504| 198 247 292 292 284 | End of listing. =========================================================== Last observations Observation listing from file ./rd2206.skd for experiment RD2206 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny Ns On Wz 1608+243 22181-173114| 480 480 461 480 480 480| 1717+178 22181-174057| 42 91 70 70 249 249| 1101+384 22181-174637| 470 311 397 480 480 373| 0636+680 22181-175337| 147 96 147| 1823+568 22181-175712| 158 158 92 115 158 158| End of listing. =========================================================== SKED Summary from file ./rd2206.skd for experiment RD2206 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 5.5 Min = 0.0 Max = 34.8 (Baseline Kk-Wz on 0507+179) RMS = 3.8 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Mc=MEDICINA Ny=NYALES20 Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Hh Kk Mc Ny Ns On Wz Avg % obs. time: 34 38 56 70 72 73 71 59 % cal. time: 1 2 3 3 2 3 3 2 % slew time: 22 7 37 14 2 15 8 15 % idle time: 41 52 3 13 23 8 17 23 total # scans: 120 141 258 229 201 220 264 204 # scans/hour : 5 6 11 10 8 9 11 9 Avg scan (sec): 246 235 189 263 308 285 232 250 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 3.78 4.25 6.23 7.71 7.93 8.04 7.86 6.54 # OF OBSERVATIONS BY BASELINE | Hh Kk Mc Ny Ns On Wz Total --------------------------------------------- Hh| 0 107 100 82 96 111 496 Kk| 129 109 99 104 138 579 Mc| 221 194 216 243 1110 Ny| 198 215 210 1053 Ns| 195 187 955 On| 204 1030 Wz| 1093 Number of 2-station scans: 17 Number of 3-station scans: 38 Number of 4-station scans: 22 Number of 5-station scans: 39 Number of 6-station scans: 167 Number of 7-station scans: 0 Total number of scans: 283 Total number of obs: 3158 Total integrated obs-time: 728623 Average obs-time: 230.7 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: | 349| 199| 257| 262| 184| 124| 183| 178| 178| 154| 114| 90| 100| 61| 80| 102| 29| 62| 452| Average X-band SNRs by baseline | Hh Kk Mc Ny Ns On Wz AVG -------------------------------------------- Hh| - 60 44 48 55 91 61 Kk| 44 41 43 48 77 52 Mc| 54 55 81 133 76 Ny| 58 60 86 60 Ns| 61 91 62 On| 132 77 Wz| 105 Average S-band SNRs by baseline | Hh Kk Mc Ny Ns On Wz AVG -------------------------------------------- Hh| - 33 28 20 31 47 33 Kk| 44 42 29 45 67 47 Mc| 27 18 35 52 35 Ny| 21 29 39 30 Ns| 19 27 22 On| 51 34 Wz| 46 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO KOKEE MEDICINA 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 Kk KOKEE Mark5B Mc MEDICINA 17640feet (Thin ) 56250 (HIGH ) 1 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 Kk Mc Ny Ns On Hh Kk Mc Ny Ns On Kk 20 Kk 15 Mc 20 20 Mc 15 15 Ny 20 20 20 Ny 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 ===========================================================