Session Notes for rd2409 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2409 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. During the time, Wettzell (Wz) and Kokee (Kk) will observe: INT I24324 from 1730 UT to 1845 UT / DOY 324 INT II4324 from 2315 UT to 0045 UT / DOYS 324-325 INT I24325 from 1715 UT to 1800 UT / DOY 324 The fill command was used for all stations using a fill offset of 10 seconds. Fortleza (Ft) in tagalong mode. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2409 Description R&D-11/2024 Scheduler: OSO Correlator: SHAO Start: 2024-324-17:30:00 End: 2024-325-17:30:00 Current yyyyddd: 2024324 (2024.89) ( 20634 MJD, TUES 19NOV.) Greenwich sidereal time: 21:26:56 (17:30:00 UT) Sun's RA and DEC: 15h 42.5m -19d 41.1 =========================================================== First observations Observation listing from file ./rd2409.skd for experiment RD2409 Source Start DURATIONS name yyddd-hhmmss Hh Kk Km Ma On Wz Ft 0138-097 24324-173000| 94 40 81 94 | 2201+315 24324-173312| 44 40 44 | 0014+813 24324-173604| 40 40 40 | 1221+809 24324-173738| 77 102 102 | 0300+470 24324-174046| 91 40 91 | 2136+141 24324-174412| 40 81 81 81| 2131-021 24324-174637| 480 40 79 480| 0507+179 24324-174923| 40 149 149 | 0707+476 24324-175314| 115 240 240 | 0010+405 24324-175843| 480 55 480 480 | 0149+218 24324-181058| 218 197 325 325 | NRAO190 24324-181732| 69 40 69 | 0528+134 24324-181950| 40 248 248 | 0636+680 24324-182529| 196 222 222 | 1342+663 24324-183022| 87 119 119 | 0444+634 24324-183338| 249 480 480 | 0202-172 24324-184607| 212 40 138 167 212 | 0159+723 24324-185038| 150 119 141 134 150 | End of listing. =========================================================== Last observations Observation listing from file ./rd2409.skd for experiment RD2409 Source Start DURATIONS name yyddd-hhmmss Hh Kk Km Ma On Wz Ft 0426+273 24325-164414| 480 391 480 309 | 2136+141 24325-165011| 480 101 177 480| 1842+681 24325-165413| 480 60 480 480 129 | 2150+173 24325-165728| 40 40 | 0237+040 24325-170824| 480 92 480 480 396 | 0524+034 24325-171318| 102 85 | 0149+218 24325-171936| 163 199 329 367 | 0202-172 24325-172506| 40 72 | 2136+141 24325-172657| 40 64 183| 0436-129 24325-172822| 98 98 | 1633+38 24325-172919| 41 41 | End of listing. =========================================================== SKED Summary from file ./rd2409.skd for experiment RD2409 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 4.8 Min = 0.0 Max = 51.4 (Baseline Km-Ft on 0607-157) RMS = 5.4 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Km=KUNMING Ma=MATERA On=ONSALA60 Wz=WETTZELL Ft=FORTLEZA Hh Kk Km Ma On Wz Ft Avg % obs. time: 37 46 40 65 69 64 6 47 % cal. time: 1 2 3 2 2 3 0 2 % slew time: 24 5 49 17 14 9 1 18 % idle time: 36 46 7 15 14 23 92 34 total # scans: 126 133 248 193 215 265 17 171 # scans/hour : 5 6 10 8 9 11 1 7 Avg scan (sec): 253 297 140 289 276 209 289 250 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 4.09 5.06 4.44 7.15 7.61 7.10 0.63 5.15 # OF OBSERVATIONS BY BASELINE | Hh Kk Km Ma On Wz Ft Total --------------------------------------------- Hh| 0 88 85 82 102 14 371 Kk| 114 80 96 131 1 422 Km| 152 176 212 9 751 Ma| 174 156 11 658 On| 183 8 719 Wz| 10 794 Ft| 53 Number of 2-station scans: 30 Number of 3-station scans: 75 Number of 4-station scans: 99 Number of 5-station scans: 102 Number of 6-station scans: 1 Number of 7-station scans: 0 Total number of scans: 307 Total number of obs: 1884 Total integrated obs-time: 369527 Average obs-time: 196.1 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: | 295| 138| 187| 175| 120| 135| 96| 90| 106| 53| 61| 59| 42| 27| 37| 27| 28| 15| 193| Average X-band SNRs by baseline | Hh Kk Km Ma On Wz Ft AVG -------------------------------------------- Hh| - 85 49 65 95 118 76 Kk| 53 26 37 60 116 47 Km| 56 73 104 97 77 Ma| 52 78 51 55 On| 108 92 71 Wz| 169 92 Ft| 106 Average S-band SNRs by baseline | Hh Kk Km Ma On Wz Ft AVG -------------------------------------------- Hh| - 47 25 27 41 50 36 Kk| 64 31 36 53 135 48 Km| 27 33 48 57 43 Ma| 27 39 25 30 On| 50 35 36 Wz| 63 47 Ft| 48 =========================================================== 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 KUNMING MATERA 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 17640feet (Thin ) 56250 (HIGH ) 1 Kk KOKEE Mark5B Km KUNMING Mark5B Ma MATERA Mark5B 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 Km Ma On Wz Hh Kk Km Ma On Wz Kk 20 Kk 15 Km 20 20 Km 15 15 Ma 20 20 20 Ma 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 Ft 20 20 20 20 20 20 Ft 15 15 15 15 15 15 ===========================================================