Session Notes for rd1412 Prepared by K. Le Bail and J. Gipson, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal: observation of 14 sources in category 4, 4 sources in category 3 with bad position uncertainties, and 3 sources in categories 1 and 2 with no observation in the past 12 months. The Laboratory d'Astrophysique de Bordeaux (LAB) subnmitted 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. We noticed that 4 sources in category 3 have a position uncertainties between 100 and 200 microas. They will be observed in this session to improve their uncertainties. Also, 3 sources in categories 1 and 2 have not been observed in the past 12 months, probably because they are weak sources. They will be observed in this session to re-evaluate their flux. In RD1412, we use 21 sources 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 sked flux catalog. Wettzell will observe INT I14351 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1412 Description R&D-12/2014 Scheduler: NASA Correlator: HAYS Start: 2014-351-18:00:00 End: 2014-352-18:00:00 Current yyyyddd: 2014351 (2014.96) ( 17009 MJD, WED. 17DEC.) Greenwich sidereal time: 23:45:08 (18:00:00 UT) Sun's RA and DEC: 17h 41.3m -23d 22.0 =========================================================== First observations Observation listing from file ./rd1412.skd for experiment RD1412 Source Start DURATIONS name yyddd-hhmmss Hh Ho Ny On Sh Wz 0420+022 14351-180000| 40 40 40 40 40| 2113+293 14351-180213| 53 53 40| 0627-199 14351-180259| 41 40 41 | 2353+816 14351-180426| 72 72 55| End of listing. =========================================================== Last observations Observation listing from file ./rd1412.skd for experiment RD1412 Source Start DURATIONS name yyddd-hhmmss Hh Ho Ny On Sh Wz 0528-250 14351-180855| 79 79 46 | 1215+303 14351-181319| 240 285 285 | 0202+319 14351-181350| 40 40 40| 2355-106 14351-181726| 62 62 | End of listing. =========================================================== SKED Summary from file ./rd1412.skd for experiment RD1412 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 4.9 Min = 0.0 Max = 96.0 (Baseline Ho-On on 0823-223) RMS = 9.1 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Ho=HOBART26 Ny=NYALES20 On=ONSALA60 Sh=SESHAN25 Wz=WETTZELL Hh Ho Ny On Sh Wz Avg % obs. time: 39 40 48 44 59 58 48 % cal. time: 2 2 2 2 2 2 2 % slew time: 37 29 13 15 24 8 21 % idle time: 21 28 36 38 14 31 28 total # scans: 181 194 202 205 206 202 198 # scans/hour : 8 8 8 9 9 8 8 Avg scan (sec): 186 177 206 183 246 248 207 # data tracks: 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 Total TBytes: 2.4 2.5 3.0 2.7 3.6 3.6 3.0 Total TB(M5): 2.2 2.2 2.7 2.4 3.2 3.2 2.6 # OF OBSERVATIONS BY BASELINE | Hh Ho Ny On Sh Wz Total ---------------------------------------- Hh| 73 50 74 43 101 341 Ho| 37 16 134 18 278 Ny| 155 67 109 418 On| 38 132 415 Sh| 71 353 Wz| 431 Number of 2-station scans: 251 Number of 3-station scans: 133 Number of 4-station scans: 58 Number of 5-station scans: 9 Number of 6-station scans: 2 Total number of scans: 453 Total number of obs: 1118 Total integrated obs-time: 227590 Average obs-time: 203.6 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: | 291| 119| 36| 36| 33| 69| 53| 57| 47| 32| 25| 12| 7| 36| 29| 62| 31| 68| 75Average X-band SNRs by baseline | Hh Ho Ny On Sh Wz AVG --------------------------------------- Hh| 36 41 31 46 47 40 Ho| 27 25 40 34 36 Ny| 44 45 60 46 On| 35 57 44 Sh| 55 44 Wz| 54 Average S-band SNRs by baseline | Hh Ho Ny On Sh Wz AVG --------------------------------------- Hh| 34 21 22 21 25 25 Ho| 18 19 27 19 27 Ny| 17 19 22 19 On| 16 21 19 Sh| 19 22 Wz| 22 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode setup for: HARTRAO HOBART26 NYALES20 ONSALA60 SESHAN25 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 Hh HARTRAO Mark5B Ho HOBART26 Mark5A Ny NYALES20 Mark5B On ONSALA60 Mark5B Sh SESHAN25 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) Hh Ho Ny On Sh Hh Ho Ny On Sh Ho 20 Ho 15 Ny 20 20 Ny 15 15 On 20 20 20 On 15 15 15 Sh 20 20 20 20 Sh 15 15 15 15 Wz 20 20 20 20 20 Wz 15 15 15 15 15 ===========================================================