Session Notes for rd2204 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2204 will observe a total of 52 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 I22110 during the time from 1815 UT to 1945 UT. Tianma60 was tagged along. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2204 Description R&D-04/2022 Scheduler: OSO Correlator: SHAO Start: 2022-110-18:00:00 End: 2022-111-18:00:00 Current yyyyddd: 2022110 (2022.30) ( 19690 MJD, WED. 20APR.) Greenwich sidereal time: 07:55:13 (18:00:00 UT) Sun's RA and DEC: 1h 54.1m 11d 41.7 =========================================================== First observations Observation listing from file ./rd2204.skd for experiment RD2204 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny Ns On Wz T6 1739+522 22110-180000| 244 40 175 244 182 212 40| 0754+100 22110-180443| 104 151 243 258 236 258 | 1147+245 22110-180952| 86 149 55 114 161 161 40| 0149+218 22110-181226| 154 216 216 | 1145-071 22110-181345| 40 96 96 75 40| 0834+250 22110-181727| 131 153 222 222 222 | 1049+215 22110-182202| 553 340 389 684 684 40| End of listing. =========================================================== Last observations Observation listing from file ./rd2204.skd for experiment RD2204 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc Ny Ns On Wz T6 1637+574 22111-173127| 43 40 40 43 40| 0149+218 22111-173337| 209 209 73 | 0919-260 22111-173525| 61 136 136 50 | 0507+179 22111-174006| 82 155 40 116 155 116 | 1608+243 22111-174233| 657 657 472 40| 0925-203 22111-174508| 181 228 349 349 | 1101-325 22111-175009| 40 40 | 0524+034 22111-175523| 267 267 119 267 142 | 2201+315 22111-175840| 40 40 | End of listing. =========================================================== SKED Summary from file ./rd2204.skd for experiment RD2204 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 8.1 Min = 0.0 Max = 99.3 (Baseline Kk-Ny on 0009+081) RMS = 7.6 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Mc=MEDICINA Ny=NYALES20 Ns=NYALE13S On=ONSALA60 Wz=WETTZELL T6=TIANMA65 Hh Kk Mc Ny Ns On Wz T6 Avg % obs. time: 41 39 58 72 71 77 72 7 55 % cal. time: 2 2 3 3 2 2 2 2 2 % slew time: 33 9 32 18 1 12 5 29 18 % idle time: 22 49 5 6 24 8 19 61 25 total # scans: 186 157 254 298 194 212 196 157 206 # scans/hour : 8 7 11 12 8 9 8 7 9 Avg scan (sec): 192 217 199 207 318 314 319 41 225 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TB(M5): 4.56 4.36 6.46 7.91 7.89 8.52 8.00 0.82 6.06 # OF OBSERVATIONS BY BASELINE | Hh Kk Mc Ny Ns On Wz T6 Total -------------------------------------------------- Hh| 0 181 102 59 149 144 74 709 Kk| 38 155 103 32 29 62 419 Mc| 169 108 205 191 109 1001 Ny| 191 139 122 143 1021 Ns| 110 97 82 750 On| 194 88 917 Wz| 81 858 T6| 639 Number of 2-station scans: 46 Number of 3-station scans: 89 Number of 4-station scans: 111 Number of 5-station scans: 33 Number of 6-station scans: 70 Number of 7-station scans: 38 Number of 8-station scans: 0 Total number of scans: 387 Total number of obs: 3157 Total integrated obs-time: 643649 Average obs-time: 203.9 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: | 1074| 310| 252| 247| 219| 165| 114| 76| 87| 52| 72| 48| 46| 56| 58| 61| 32| 22| 30| 136| Average X-band SNRs by baseline | Hh Kk Mc Ny Ns On Wz T6 AVG ------------------------------------------------- Hh| - 45 57 48 39 38 117 52 Kk| 48 73 44 43 41 164 73 Mc| 82 60 66 64 155 73 Ny| 105 82 71 212 99 Ns| 66 59 135 77 On| 61 118 67 Wz| 108 63 T6| 151 Average S-band SNRs by baseline | Hh Kk Mc Ny Ns On Wz T6 AVG ------------------------------------------------- Hh| - 28 28 17 24 26 64 29 Kk| 36 49 27 37 41 123 52 Mc| 34 18 31 33 73 35 Ny| 25 34 33 84 41 Ns| 20 20 39 24 On| 32 55 32 Wz| 56 33 T6| 70 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO KOKEE MEDICINA NYALES20 NYALE13S ONSALA60 TIANMA65 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 T6 TIANMA65 Mark5B 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 Wz Hh Kk Mc Ny Ns On Wz 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 T6 20 20 20 20 20 20 20 T6 15 15 15 15 15 15 15 ===========================================================