Session Notes for rd1408 Prepared by K. Le Bail and J. Gipson, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal: observation of 24 sources in category 4, 4 sources in category 3 with bad position uncertainties, and 5 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. For this session, the followed strategy is the same than the strategy for RD1406. 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, 5 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 RD1408, we use 33 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 a composite flux catalog: if the flux values are missing or too low in the sked catalog, we use the flux values provided by LAB. Unfortunately, due to the weakness of some of the sources and the network, we were not able to schedule 3 of the 33 sources. Wettzell and Kokee will observe INT I14273 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1408 Description R&D-09/2014 Scheduler: NASA Correlator: HAYS Start: 2014-273-17:30:00 End: 2014-274-17:30:00 Current yyyyddd: 2014273 (2014.75) ( 16931 MJD, TUES 30SEP.) Greenwich sidereal time: 18:07:31 (17:30:00 UT) Sun's RA and DEC: 12h 27.5m -2d 58.0 =========================================================== First observations Observation listing from file ./rd1408.skd for experiment RD1408 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Ny Wz 0202+319 14273-173000| 40 40 40 40| 1846+322 14273-173203| 138 125 138 64| 1639+230 14273-173630| 316 271 316 236| 1308+328 14273-174346| 336 336 173 105| End of listing. =========================================================== Last observations Observation listing from file ./rd1408.skd for experiment RD1408 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Ny Wz 0823-223 14273-175410| 40 40 | 1215+303 14273-175614| 115 145 145| 1954-388 14273-175733| 41 41 | 1104+728 14273-175924| 168 253 253| End of listing. =========================================================== SKED Summary from file ./rd1408.skd for experiment RD1408 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 5.4 Min = 0.0 Max = 61.3 (Baseline Ho-Ny on 0812+020) RMS = 9.5 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Ny=NYALES20 Wz=WETTZELL Ft Hh Ho Kk Ny Wz Avg % obs. time: 35 44 42 46 54 46 45 % cal. time: 1 2 2 2 3 3 2 % slew time: 21 39 32 14 15 9 22 % idle time: 42 14 23 37 27 42 31 total # scans: 126 180 188 201 239 226 193 # scans/hour : 5 8 8 8 10 9 8 Avg scan (sec): 237 213 195 196 197 177 202 # data tracks: 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 Total TBytes: 2.1 2.8 2.6 2.8 3.4 2.9 2.8 Total TB(M5): 1.9 2.5 2.3 2.5 3.0 2.6 2.5 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Ny Wz Total ---------------------------------------- Ft| 68 26 30 55 66 245 Hh| 79 0 61 105 313 Ho| 103 31 28 267 Kk| 116 61 310 Ny| 171 434 Wz| 431 Number of 2-station scans: 244 Number of 3-station scans: 168 Number of 4-station scans: 42 Number of 5-station scans: 0 Number of 6-station scans: 0 Total number of scans: 454 Total number of obs: 1000 Total integrated obs-time: 194031 Average obs-time: 194.0 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: | 189| 71| 72| 66| 57| 75| 59| 30| 86| 25| 34| 33| 24| 34| 48| 23| 26| 7| 41Average X-band SNRs by baseline | Ft Hh Ho Kk Ny Wz AVG --------------------------------------- Ft| 26 25 20 32 33 28 Hh| 26 - 33 40 32 Ho| 24 25 30 25 Kk| 28 30 26 Ny| 47 37 Wz| 40 Average S-band SNRs by baseline | Ft Hh Ho Kk Ny Wz AVG --------------------------------------- Ft| 20 29 25 16 16 20 Hh| 30 - 22 24 24 Ho| 41 19 22 32 Kk| 25 28 31 Ny| 23 22 Wz| 23 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode setup for: FORTLEZA HARTRAO HOBART26 KOKEE NYALES20 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 Hh HARTRAO Mark5B Ho HOBART26 Mark5A Kk KOKEE Mark5B Ny NYALES20 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 Hh Ho Kk Ny Ft Hh Ho Kk Ny Hh 20 Hh 15 Ho 20 20 Ho 15 15 Kk 20 20 20 Kk 15 15 15 Ny 20 20 20 20 Ny 15 15 15 15 Wz 20 20 20 20 20 Wz 15 15 15 15 15 ===========================================================