Session Notes for rd1403 Prepared by K. Le Bail and J. Gipson, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal: observation of the 24 sources in the category 4. The Laboratory d'Astrophysique de Bordeaux (LAB) submitted a proposal to observe 195 ICRF2 transfer sources in the context of the GAIA mission. Those 195 sources are divided in four categories. The forth category contains 24 sources which are not part of the IVS monitoring program and which have a poor position accuracy. The goal in observing them in R&D sessions is at first to improve their position accuracy. In RD1403, we use ten sources of the category 4 of the GAIA proposal in the astro mode of sked. Forty of the good geodetic sources are used as base of a stable sources set and uniform sky coverage. We use the flux values provided by LAB. They were modified for four of the sources: due to their low success rate in previous sessions, we lowered the flux values to force sked to schedule longer scans. Wettzell will observe INT I14113 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1403 Description R&D-02/2013 Scheduler: NASA Correlator: HAYS Start: 2014-113-18:00:00 End: 2014-114-18:00:00 Current yyyyddd: 2014113 (2014.31) ( 16771 MJD, WED. 23APR.) Greenwich sidereal time: 8: 6: 0.00 (18: 0: 0 UT) Sun's RA and DEC: 2h 5.1m 12d 40.9 =========================================================== First observations Observation listing from file ./rd1403.skd for experiment RD1403 Source Start DURATIONS name yyddd-hhmmss Ft Ht Mc Ny On Wf Wz 0641+392 14113-180000| 480 332 267 304 480 258 181| 0606-223 14113-180628| 58 68 68 51| 0834-201 14113-181043| 56 40 40 56 40| 0446+112 14113-181310| 99 107 135 135 74| =========================================================== Last observations Observation listing from file ./rd1403.skd for experiment RD1403 Source Start DURATIONS name yyddd-hhmmss Ft Ht Mc Ny On Wf Wz 0446+112 14113-181310| 99 107 135 135 74| 1104-445 14113-181341| 79 79 | 1057-797 14113-181609| 139 139 | 2353+816 14113-181702| 46 40 57 57 | 0241+622 14113-182258| 500 304 291 500 272 | 3C418 14113-182915| 40 40 40 | 1104+728 14113-183358| 548 542 548 520 | 0506-612 14113-183520| 139 139 | =========================================================== SKED Summary from file ./rd1403.skd for experiment RD1403 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 6.6 Min = 0.0 Max = 38.0 (Baseline Ht-Wf on 1324+224) RMS = 7.5 Total time: 1439 minutes ( 24.0 hours). Key: Ft=FORTLEZA Ht=HART15M Mc=MEDICINA Ny=NYALES20 On=ONSALA60 Wf=WESTFORD Wz=WETTZELL Ft Ht Mc Ny On Wf Wz Avg % obs. time: 33 35 60 57 66 39 46 48 % cal. time: 2 2 2 2 2 2 2 2 % slew time: 23 10 31 12 14 9 8 16 % idle time: 41 52 6 28 17 49 43 34 total # scans: 133 179 206 183 173 164 199 176 # scans/hour : 6 7 9 8 7 7 8 7 Avg scan (sec): 214 167 252 267 331 205 198 233 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TBytes: 2.0 2.2 3.7 3.5 4.1 2.4 2.8 3.0 Total TB(M5): 1.8 1.9 3.3 3.1 3.7 2.2 2.5 2.6 # OF OBSERVATIONS BY BASELINE | Ft Ht Mc Ny On Wf Wz Total --------------------------------------------- Ft| 108 58 45 60 72 56 399 Ht| 110 78 76 67 104 543 Mc| 161 154 122 185 790 Ny| 152 114 152 702 On| 104 146 692 Wf| 120 599 Wz| 763 Number of 2-station scans: 65 Number of 3-station scans: 54 Number of 4-station scans: 47 Number of 5-station scans: 91 Number of 6-station scans: 27 Number of 7-station scans: 20 Total number of scans: 304 Total number of obs: 2244 Total integrated obs-time: 499760 Average obs-time: 222.7 Histogram of observation durations Dur: 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 510 540 570 600#Obs: | 693| 151| 102| 118| 86| 80| 171| 97| 101| 51| 30| 45| 72| 82| 24| 38| 66| 104| 133Average X-band SNRs by baseline | Ft Ht Mc Ny On Wf Wz AVG -------------------------------------------- Ft| 38 36 29 31 34 44 36 Ht| 41 34 30 37 49 39 Mc| 50 42 44 63 48 Ny| 42 46 58 46 On| 37 50 41 Wf| 54 43 Wz| 55 Average S-band SNRs by baseline | Ft Ht Mc Ny On Wf Wz AVG -------------------------------------------- Ft| 23 17 17 16 19 17 19 Ht| 29 29 24 30 30 27 Mc| 27 22 27 30 26 Ny| 22 27 29 26 On| 23 24 22 Wf| 29 26 Wz| 27 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode setup for: FORTLEZA HART15M MEDICINA NYALES20 ONSALA60 WESTFORD WETTZELL Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 512 Mbits 256 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 32(*1) 32 0.00 X-band spanned bw= 720.0 MHz rms spanned bw= 280.4 MHz S-band spanned bw= 140.0 MHz rms spanned bw= 50.9 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 Ht HART15M Mark5B Mc MEDICINA Mark5A Ny NYALES20 Mark5B On ONSALA60 Mark5A Wf WESTFORD Mark5B Wz WETTZELL Mark5A =========================================================== 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 Ht Mc Ny On Wf Ft Ht Mc Ny On Wf Ht 20 Ht 15 Mc 20 20 Mc 15 15 Ny 20 20 20 Ny 15 15 15 On 20 20 20 20 On 15 15 15 15 Wf 20 20 20 20 20 Wf 15 15 15 15 15 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15 ===========================================================