Session Notes for rd2010 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2010 will observe a total of 51 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 with an offset of 10 seconds. Wettzell and Kokee will observe INT I20337 during the time from 1815 UT to 1945 UT (day 337). Wettzell will observe INT WD338Q during the time from 1545 UT to 1815 UT (day 338). =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2010 Description R&D-12/2020 Scheduler: OSO Correlator: WASH Start: 2020-337-18:00:00 End: 2020-338-18:00:00 Current yyyyddd: 2020337 (2020.92) ( 19186 MJD, WED. 2DEC.) Greenwich sidereal time: 22:48:09 (18:00:00 UT) Sun's RA and DEC: 16h 37.8m -22d 5.6 =========================================================== First observations Observation listing from file ./rd2010.skd for experiment RD2010 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc On Wz 0106+013 20337-180000| 182 40 152 182| 0014+813 20337-180407| 55 40 40 55| 1221+809 20337-180548| 46 40 40 46| 1342+663 20337-180719| 189 163 99 189| 1823+568 20337-181119| 42 40 40 42| 1758+388 20337-181250| 130 57 130 130| 0506+056 20337-181727| 58 157 157 | 2319+317 20337-182306| 65 100 100 | End of listing. =========================================================== Last observations Observation listing from file ./rd2010.skd for experiment RD2010 Source Start DURATIONS name yyddd-hhmmss Hh Kk Mc On Wz 2209+236 20338-173333| 287 394 394 | 0422+004 20338-174311| 188 251 251 | 0426+273 20338-174833| 392 433 433 | 0506+056 20338-175705| 165 165 65 | 0812+367 20338-175904| 46 46 | End of listing. =========================================================== SKED Summary from file ./rd2010.skd for experiment RD2010 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 8.3 Min = 0.0 Max = 26.7 (Baseline Kk-Mc on 2029+121) RMS = 4.7 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Mc=MEDICINA On=ONSALA60 Wz=WETTZELL Hh Kk Mc On Wz Avg % obs. time: 34 31 55 69 64 50 % cal. time: 2 1 3 3 3 2 % slew time: 30 5 37 16 7 19 % idle time: 33 62 4 12 26 28 total # scans: 152 113 279 255 241 208 # scans/hour : 6 5 12 11 10 9 Avg scan (sec): 196 236 169 233 228 211 # data tracks: 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 Total TB(M5): 3.81 3.42 6.03 7.60 7.04 5.58 # OF OBSERVATIONS BY BASELINE | Hh Kk Mc On Wz Total ----------------------------------- Hh| 0 151 144 116 411 Kk| 110 101 110 321 Mc| 252 238 751 On| 213 710 Wz| 677 Number of 2-station scans: 13 Number of 3-station scans: 66 Number of 4-station scans: 204 Number of 5-station scans: 0 Total number of scans: 283 Total number of obs: 1435 Total integrated obs-time: 267026 Average obs-time: 186.1 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: | 237| 155| 158| 110| 74| 82| 49| 95| 66| 56| 47| 41| 54| 21| 32| 18| 18| 27| 95| Average X-band SNRs by baseline | Hh Kk Mc On Wz AVG ---------------------------------- Hh| - 54 44 79 58 Kk| 28 30 51 37 Mc| 71 120 77 On| 111 72 Wz| 99 Average S-band SNRs by baseline | Hh Kk Mc On Wz AVG ---------------------------------- Hh| - 27 22 35 27 Kk| 47 46 68 54 Mc| 32 50 39 On| 48 37 Wz| 49 =========================================================== Recording mode Name Code AOVSX16W SX Recording mode for: HARTRAO KOKEE MEDICINA 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 Density Passes Hh HARTRAO Mark5B Kk KOKEE Mark5B Mc MEDICINA 17640feet (Thin ) 56250 (HIGH ) 1 On ONSALA60 17640feet (Thin ) 56250 (HIGH ) 1 Wz WETTZELL 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 Kk Mc On Hh Kk Mc On Kk 20 Kk 15 Mc 20 20 Mc 15 15 On 20 20 20 On 15 15 15 Wz 20 20 20 20 Wz 15 15 15 15 ===========================================================