Session Notes for rd2306 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2306 will observe a total of 45 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. Wettzell (Wz) and Kokee (Kk) will observe INT I23186 during the time from 1815 UT to 1945 UT and INT II3186 during the time from 2315 UT to 0045 UT. The fill command was used for all stations using a fill offset of 10 seconds. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2306 Description R&D-07/2023 Scheduler: OSO Correlator: SHAO Start: 2023-186-18:00:00 End: 2023-187-18:00:00 Current yyyyddd: 2023186 (2023.51) ( 20131 MJD, WED. 5JUL.) Greenwich sidereal time: 12:53:53 (18:00:00 UT) Sun's RA and DEC: 6h 58.5m 22d 45.2 =========================================================== First observations Observation listing from file ./rd2306.skd for experiment RD2306 Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ny Ns On Wz 1144+402 23186-180000| 97 155 110 119 155 116 137| 0707+476 23186-180310| 575 267 255 273 575 259 283| 0745+241 23186-180828| 77 58 57 47 77| 1849+670 23186-181112| 60 147 101 147 80| 0620+389 23186-181322| 98 98| 1555+001 23186-181543| 165 76 154 167 167 | 1520+437 23186-181958| 628 516 613 628 627 | End of listing. =========================================================== Last observations Observation listing from file ./rd2306.skd for experiment RD2306 Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ny Ns On Wz 1144+402 23187-171748| 231 260 260 | 1049+215 23187-172322| 720 623 720 630 720 469| 1849+670 23187-173208| 219 96 219| 1441+252 23187-173719| 661 720 450 720 720 460| 0804+499 23187-174608| 191 67 191| 1555+001 23187-175029| 45 115 40 147 147| 1758+388 23187-175401| 359 359 188 321 359 239| 1221+809 23187-175850| 70 41 70| End of listing. =========================================================== SKED Summary from file ./rd2306.skd for experiment RD2306 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 6.5 Min = 0.0 Max = 44.1 (Baseline Ft-Wz on 1101-325) RMS = 5.1 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Kk=KOKEE Ma=MATERA Ny=NYALES20 Ns=NYALE13S On=ONSALA60 Wz=WETTZELL Ft Hh Kk Ma Ny Ns On Wz Avg % obs. time: 51 42 48 72 65 72 79 68 62 % cal. time: 1 2 1 2 3 2 2 3 2 % slew time: 17 32 6 18 13 1 12 7 14 % idle time: 29 23 44 7 18 24 6 22 22 total # scans: 123 156 124 189 222 132 183 220 168 # scans/hour : 5 7 5 8 9 6 8 9 7 Avg scan (sec): 360 235 333 329 252 474 374 266 327 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TB(M5): 5.67 4.69 5.28 7.95 7.17 8.01 8.75 7.48 6.87 # OF OBSERVATIONS BY BASELINE | Ft Hh Kk Ma Ny Ns On Wz Total -------------------------------------------------- Ft| 76 20 75 63 44 56 72 406 Hh| 0 109 81 33 83 107 489 Kk| 50 104 75 70 86 405 Ma| 142 80 151 152 759 Ny| 112 156 170 828 Ns| 103 88 535 On| 147 766 Wz| 822 Number of 2-station scans: 60 Number of 3-station scans: 65 Number of 4-station scans: 68 Number of 5-station scans: 63 Number of 6-station scans: 43 Number of 7-station scans: 27 Number of 8-station scans: 0 Total number of scans: 326 Total number of obs: 2505 Total integrated obs-time: 765232 Average obs-time: 305.5 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: | 351| 183| 210| 160| 190| 150| 162| 165| 78| 83| 57| 85| 54| 56| 62| 53| 53| 27| 14| 312| Average X-band SNRs by baseline | Ft Hh Kk Ma Ny Ns On Wz AVG ------------------------------------------------- Ft| 34 31 39 42 38 36 54 40 Hh| - 50 57 44 43 73 52 Kk| 43 49 35 38 57 45 Ma| 71 51 63 99 65 Ny| 63 67 102 69 Ns| 48 70 52 On| 91 61 Wz| 83 Average S-band SNRs by baseline | Ft Hh Kk Ma Ny Ns On Wz AVG ------------------------------------------------- Ft| 21 30 18 20 13 18 24 20 Hh| - 26 28 18 24 36 27 Kk| 34 38 24 34 44 35 Ma| 28 17 26 36 27 Ny| 20 28 36 29 Ns| 17 21 19 On| 35 27 Wz| 34 =========================================================== 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 MATERA NYALES20 NYALE13S 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 Mark5B Kk KOKEE 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 =========================================================== 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) Ft Hh Kk Ma Ny Ns On Ft Hh Kk Ma Ny Ns On Hh 20 Hh 15 Kk 20 20 Kk 15 15 Ma 20 20 20 Ma 15 15 15 Ny 20 20 20 20 Ny 15 15 15 15 Ns 20 20 20 20 20 Ns 15 15 15 15 15 On 20 20 20 20 20 20 On 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 ===========================================================