Session Notes for rd2202 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2202 will observe a total of 58 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 I22033 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2202 Description R&D-02/2022 Scheduler: OSO Correlator: SHAO Start: 2022-033-18:00:00 End: 2022-034-18:00:00 Current yyyyddd: 2022033 (2022.09) ( 19613 MJD, WED. 2FEB.) Greenwich sidereal time: 02:51:38 (18:00:00 UT) Sun's RA and DEC: 21h 5.4m -16d 39.7 =========================================================== First observations Observation listing from file ./rd2202.skd for experiment RD2202 Source Start DURATIONS name yyddd-hhmmss Hh Is Kk Km Ma Ny Ns On Wz Yg 0722+145 22033-180000| 90 215 101 150 165 289 284 205 289| 1637+574 22033-180422| 61 49 40 40 49 61 | 0524-485 22033-180530| 136 136| 1342+663 22033-180602| 176 153 104 137 154 178 73 178 | 1823+568 22033-180937| 140 130 323 133 144 122 323 | 1004-500 22033-181140| 189 253 253| End of listing. =========================================================== Last observations Observation listing from file ./rd2202.skd for experiment RD2202 Source Start DURATIONS name yyddd-hhmmss Hh Is Kk Km Ma Ny Ns On Wz Yg 0743-006 22034-174854| 41 52 40 91 115 126 126| 4C39.25 22034-175153| 40 58 40 70 123 176 135 54 176| 0954+658 22034-175342| 64 136 136 | 0237+040 22034-175350| 40 40 | 0106+013 22034-175535| 64 40 40 64 | 1726+455 22034-175736| 134 134 52 134 134 | 0823-223 22034-175905| 45 40 45 45| End of listing. =========================================================== SKED Summary from file ./rd2202.skd for experiment RD2202 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 9.4 Min = 0.0 Max = 75.8 (Baseline Kk-Ns on 2136+141) RMS = 8.7 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Is=ISHIOKA Kk=KOKEE Km=KUNMING Ma=MATERA Ny=NYALES20 Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Yg=YARRA12M Hh Is Kk Km Ma Ny Ns On Wz Yg Avg % obs. time: 36 72 53 48 64 69 70 72 70 65 62 % cal. time: 3 3 2 4 3 4 3 3 3 3 3 % slew time: 53 5 10 39 24 19 2 17 9 8 19 % idle time: 7 19 34 8 8 7 25 8 16 23 16 total # scans: 243 268 215 332 262 327 233 256 295 234 266 # scans/hour : 10 11 9 14 11 14 10 11 12 10 11 Avg scan (sec): 129 231 213 126 210 182 258 242 206 241 203 # data tracks: 32 32 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 32 32 Total TB(M5): 4.01 7.93 5.86 5.35 7.03 7.63 7.70 7.94 7.78 7.22 6.85 # OF OBSERVATIONS BY BASELINE | Hh Is Kk Km Ma Ny Ns On Wz Yg Total ------------------------------------------------------------ Hh| 83 0 165 151 112 52 122 158 159 1002 Is| 148 209 132 189 137 139 128 144 1309 Kk| 125 61 149 129 79 90 62 843 Km| 188 221 128 178 208 178 1600 Ma| 199 134 222 234 119 1440 Ny| 206 207 228 101 1612 Ns| 156 151 55 1148 On| 222 122 1447 Wz| 113 1532 Yg| 1053 Number of 2-station scans: 56 Number of 3-station scans: 89 Number of 4-station scans: 109 Number of 5-station scans: 64 Number of 6-station scans: 68 Number of 7-station scans: 64 Number of 8-station scans: 46 Number of 9-station scans: 34 Number of 10-station scans: 0 Total number of scans: 530 Total number of obs: 6493 Total integrated obs-time: 1145531 Average obs-time: 176.4 Histogram of observation durations Dur: 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 510 540 570 600 630 #Obs: | 1626| 829| 717| 662| 541| 361| 203| 194| 203| 173| 129| 131| 146| 61| 52| 43| 56| 31| 9| 326| Average X-band SNRs by baseline | Hh Is Kk Km Ma Ny Ns On Wz Yg AVG ----------------------------------------------------------- Hh| 61 - 102 74 84 46 55 100 33 72 Is| 88 161 76 109 77 71 111 60 96 Kk| 95 61 91 63 62 92 60 80 Km| 124 155 98 107 176 86 127 Ma| 160 90 126 212 46 122 Ny| 158 169 245 61 148 Ns| 104 141 49 103 On| 192 43 116 Wz| 70 165 Yg| 57 Average S-band SNRs by baseline | Hh Is Kk Km Ma Ny Ns On Wz Yg AVG ----------------------------------------------------------- Hh| 41 - 70 40 45 21 35 53 25 44 Is| 76 95 42 55 31 41 58 40 56 Kk| 99 55 69 38 50 77 53 67 Km| 72 83 45 66 96 59 77 Ma| 56 28 51 78 28 53 Ny| 43 62 80 35 61 Ns| 31 41 22 36 On| 77 28 52 Wz| 40 70 Yg| 38 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO ISHIOKA KOKEE KUNMING MATERA NYALES20 NYALE13S ONSALA60 WETTZELL YARRA12M 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 Km KUNMING Mark5B Ma MATERA Mark5B Ny NYALES20 Mark5B Ns NYALE13S 17650feet (Thin ) 33333 (Low ) 1 On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1 Wz WETTZELL 17640feet (Thin ) 56250 (HIGH ) 1 Yg YARRA12M Mark5B =========================================================== 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 Km Ma Ny Ns On Wz Hh Is Kk Km Ma Ny Ns On Wz Is 20 Is 15 Kk 20 20 Kk 15 15 Km 20 20 20 Km 15 15 15 Ma 20 20 20 20 Ma 15 15 15 15 Ny 20 20 20 20 20 Ny 15 15 15 15 15 Ns 20 20 20 20 20 20 Ns 15 15 15 15 15 15 On 20 20 20 20 20 20 20 On 15 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 15 Yg 20 20 20 20 20 20 20 20 20 Yg 15 15 15 15 15 15 15 15 15 ===========================================================