Session Notes for rd2410 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2410 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. During the time, Wettzell (Wz) will observe: INT I24346 from 1730 UT to 1845 UT / DOY 346 During the time, Wettzell (Wz) and Kokee (Kk) will observe: INT II4346 from 2315 UT to 0045 UT / DOYS 346-347 INT I24347 from 1715 UT to 1800 UT / DOY 347 The fill command was used for all stations using a fill offset of 10 seconds. Fortleza (Ft) in tagalong mode. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2410 Description R&D-12/2024 Scheduler: OSO Correlator: SHAO Start: 2024-346-18:00:00 End: 2024-347-18:00:00 Current yyyyddd: 2024346 (2024.95) ( 20656 MJD, WED. 11DEC.) Greenwich sidereal time: 23:23:45 (18:00:00 UT) Sun's RA and DEC: 17h 17.3m -23d 4.4 =========================================================== First observations Observation listing from file ./rd2410.skd for experiment RD2410 Source Start DURATIONS name yyddd-hhmmss Hh Kk Km On T6 Wz Ft 1347+539 24346-180000| 274 139 274 40 | 0123+257 24346-180615| 89 177 177 40 | 2325-150 24346-181036| 40 40 | 2145+067 24346-181321| 40 40 40| 2022-077 24346-181555| 288 288 | 1045-188 24346-181708| 180 180 40 | 4C39.25 24346-182237| 134 133 134 40 | 0805+410 24346-182544| 480 480 480 40 | 0743+259 24346-183636| 480 475 480 40 | 1038+52B 24346-184622| 143 132 147 40 147 | End of listing. =========================================================== Last observations Observation listing from file ./rd2410.skd for experiment RD2410 Source Start DURATIONS name yyddd-hhmmss Hh Kk Km On T6 Wz Ft 0420+022 24347-171558| 480 102 480 40 | 0558-396 24347-171937| 40 40 | 0919-260 24347-172251| 40 40 | 0256-005 24347-172914| 79 123 123 65 | 0422+004 24347-173227| 480 480 480 480 | 0558-396 24347-174317| 72 113 113 | 0426-380 24347-174629| 40 46 46 | 0406-127 24347-174919| 166 167 167 | 0420+022 24347-175347| 95 95 68 | 0116-219 24347-175820| 100 100 65| 0736+017 24347-175854| 66 66 | End of listing. =========================================================== SKED Summary from file ./rd2410.skd for experiment RD2410 (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 = 65.5 (Baseline Km-Wz on 2357-318) RMS = 8.6 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Km=KUNMING On=ONSALA60 T6=TIANMA65 Wz=WETTZELL Ft=FORTLEZA Hh Kk Km On T6 Wz Ft Avg % obs. time: 37 30 41 60 20 59 4 36 % cal. time: 2 1 3 3 3 3 0 2 % slew time: 36 7 44 15 47 7 3 23 % idle time: 24 61 11 22 29 30 92 39 total # scans: 191 125 247 233 245 246 33 188 # scans/hour : 8 5 10 10 10 10 1 8 Avg scan (sec): 165 206 144 222 71 208 97 158 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 4.04 3.29 4.56 6.63 2.24 6.56 0.41 3.96 # OF OBSERVATIONS BY BASELINE | Hh Kk Km On T6 Wz Ft Total --------------------------------------------- Hh| 0 134 109 126 121 18 508 Kk| 79 75 86 67 5 312 Km| 106 233 113 6 671 On| 103 209 26 628 T6| 106 4 658 Wz| 28 644 Ft| 87 Number of 2-station scans: 58 Number of 3-station scans: 199 Number of 4-station scans: 59 Number of 5-station scans: 73 Number of 6-station scans: 1 Number of 7-station scans: 0 Total number of scans: 390 Total number of obs: 1754 Total integrated obs-time: 239022 Average obs-time: 136.3 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: | 695| 162| 139| 113| 89| 102| 76| 46| 48| 39| 33| 22| 16| 8| 11| 16| 12| 14| 113| Average X-band SNRs by baseline | Hh Kk Km On T6 Wz Ft AVG -------------------------------------------- Hh| - 89 47 189 87 48 103 Kk| 65 39 146 54 26 78 Km| 66 420 106 42 200 On| 128 138 50 93 T6| 199 98 257 Wz| 77 122 Ft| 58 Average S-band SNRs by baseline | Hh Kk Km On T6 Wz Ft AVG -------------------------------------------- Hh| - 56 28 94 43 27 55 Kk| 78 54 127 68 43 83 Km| 45 188 66 31 104 On| 72 47 24 48 T6| 102 59 129 Wz| 34 61 Ft| 31 =========================================================== 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 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 Ft FORTLEZA Mark5A Hh HARTRAO 17640feet (Thin ) 56250 (HIGH ) 1 Kk KOKEE Mark5B Km KUNMING Mark5B On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1 T6 TIANMA65 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 On T6 Wz Hh Kk Km On T6 Wz Kk 20 Kk 15 Km 20 20 Km 15 15 On 20 20 20 On 15 15 15 T6 20 20 20 20 T6 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 ===========================================================