Session Notes for rd2009 Prepared by K. Le Bail, OSO / Chalmers - Onsala, Sweden =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal The session RD2009 will observe a total of 54 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 I20328 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD2009 Description R&D-11/2020 Scheduler: OSO Correlator: SHAO Start: 2020-328-16:30:00 End: 2020-329-16:30:00 Current yyyyddd: 2020328 (2020.90) ( 19177 MJD, MON. 23NOV.) Greenwich sidereal time: 20:42:25 (16:30:00 UT) Sun's RA and DEC: 15h 59.0m -20d 31.7 =========================================================== First observations Observation listing from file ./rd2009.skd for experiment RD2009 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Ma On Wz 1637+574 20328-163000| 48 40 48| 2244-372 20328-163000| 447 355 344 447 | 1038+529 20328-163146| 126 62 126| 0300+470 20328-163458| 190 156 190| 0138-097 20328-163854| 157 173 205 223 223| 0256-005 20328-164330| 63 73 219 256 256| NRAO190 20328-164615| 41 41 | 0607-157 20328-164822| 40 40 | 2131-021 20328-164900| 57 40 74 93 93| End of listing. =========================================================== Last observations Observation listing from file ./rd2009.skd for experiment RD2009 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Ma On Wz 0013-005 20329-161759| 49 123 152 152| 1034-374 20329-162002| 291 291 | 2131-021 20329-162132| 40 40 134 163 163| 0055-059 20329-162519| 104 137 111 137| 1511-100 20329-162608| 40 40 | 0202-172 20329-162845| 65 65 65 | 1633+38 20329-162845| 65 65 65 65| End of listing. =========================================================== SKED Summary from file ./rd2009.skd for experiment RD2009 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 10.5 Min = 0.0 Max = 67.0 (Baseline Ft-Ho on 0202-172) RMS = 10.0 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Ma=MATERA On=ONSALA60 Wz=WETTZELL Ft Hh Ho Kk Ma On Wz Avg % obs. time: 49 36 42 30 60 62 65 49 % cal. time: 2 3 3 2 4 3 4 3 % slew time: 31 54 36 13 27 17 8 27 % idle time: 16 6 18 54 8 16 22 20 total # scans: 209 251 250 200 306 286 308 258 # scans/hour : 9 10 10 8 13 12 13 11 Avg scan (sec): 204 123 146 130 169 188 183 163 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 5.47 3.96 4.67 3.32 6.64 6.90 7.21 5.45 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Ma On Wz Total --------------------------------------------- Ft| 136 70 38 113 98 105 560 Hh| 98 0 172 120 143 669 Ho| 134 30 8 13 353 Kk| 27 50 45 294 Ma| 241 261 844 On| 265 782 Wz| 832 Number of 2-station scans: 232 Number of 3-station scans: 191 Number of 4-station scans: 92 Number of 5-station scans: 81 Number of 6-station scans: 0 Number of 7-station scans: 0 Total number of scans: 596 Total number of obs: 2167 Total integrated obs-time: 331504 Average obs-time: 153.0 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: | 610| 264| 196| 169| 133| 99| 78| 121| 58| 53| 53| 46| 42| 44| 24| 15| 30| 39| 93| Average X-band SNRs by baseline | Ft Hh Ho Kk Ma On Wz AVG -------------------------------------------- Ft| 44 33 43 60 53 96 57 Hh| 57 - 105 81 155 92 Ho| 67 91 91 196 65 Kk| 49 63 106 68 Ma| 118 228 138 On| 208 131 Wz| 185 Average S-band SNRs by baseline | Ft Hh Ho Kk Ma On Wz AVG -------------------------------------------- Ft| 30 17 42 33 30 47 33 Hh| 33 - 57 49 80 51 Ho| 68 41 36 79 45 Kk| 44 52 81 62 Ma| 46 80 57 On| 81 57 Wz| 76 =========================================================== 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 HOBART26 KOKEE 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 Density Passes Ft FORTLEZA Mark5A Hh HARTRAO Mark5B Ho HOBART26 Mark5B Kk KOKEE Mark5B Ma MATERA Mark5B 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) Ft Hh Ho Kk Ma On Ft Hh Ho Kk Ma On Hh 20 Hh 15 Ho 20 20 Ho 15 15 Kk 20 20 20 Kk 15 15 15 Ma 20 20 20 20 Ma 15 15 15 15 On 20 20 20 20 20 On 15 15 15 15 15 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15 ===========================================================