Session Notes for rd1410 Prepared by K. Le Bail and J. Gipson, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal: observation of 17 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. For this session, the followed strategy is the same than the strategy for RD1408. 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 RD1410, we use 24 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 investigate the detection rate in previous R&D sessions. If the detection rate is acceptable, we combine the flux values from the sked catalog and the flux values provided by LAB. The intial schedule was made using Hart15M. Hart26M was added as tag-along station later due to its availability. Wettzell and Kokee will observe INT I14301 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1410 Description R&D-09/2014 Scheduler: NASA Correlator: HAYS Start: 2014-301-17:30:00 End: 2014-302-17:30:00 Current yyyyddd: 2014301 (2014.82) ( 16959 MJD, TUES 28OCT.) Greenwich sidereal time: 19:57:55 (17:30:00 UT) Sun's RA and DEC: 14h 11.7m -13d 15.5 =========================================================== First observations Observation listing from file ./rd1410.skd for experiment RD1410 Source Start DURATIONS name yyddd-hhmmss Ft Ht Ho Kk Ma Ny Wz Hh 3C418 14301-173000| 42 40 42 40 40 | 0657+172 14301-173224| 40 40 40 | 0017+200 14301-173240| 40 40 40 40| 0716+714 14301-173458| 48 70 70 47 | End of listing. =========================================================== Last observations Observation listing from file ./rd1410.skd for experiment RD1410 Source Start DURATIONS name yyddd-hhmmss Ft Ht Ho Kk Ma Ny Wz Hh 2329-415 14301-173824| 275 275 | 0241+622 14301-174631| 100 100 | 0823-223 14301-174805| 40 40 | 0410+110 14301-175110| 290 290 288 | 1751+288 14301-175154| 78 40 78 42 47| End of listing. =========================================================== SKED Summary from file ./rd1410.skd for experiment RD1410 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 5.2 Min = 0.0 Max = 55.4 (Baseline Ht-Ho on 1424+240) RMS = 8.2 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Ht=HART15M Ho=HOBART26 Kk=KOKEE Ma=MATERA Ny=NYALES20 Wz=WETTZELL Hh=HARTRAO Ft Ht Ho Kk Ma Ny Wz Hh Avg % obs. time: 33 42 48 59 63 67 49 23 48 % cal. time: 2 3 2 2 3 2 3 1 2 % slew time: 26 14 32 14 22 13 9 20 19 % idle time: 38 40 18 24 12 17 38 55 31 total # scans: 156 225 196 196 220 209 239 101 192 # scans/hour : 7 9 8 8 9 9 10 4 8 Avg scan (sec): 184 162 210 260 246 275 179 195 213 # data tracks: 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 Total TBytes: 2.1 2.6 3.0 3.7 3.9 4.1 3.1 1.4 3.0 Total TB(M5): 1.8 2.3 2.6 3.3 3.5 3.7 2.7 1.3 2.7 # OF OBSERVATIONS BY BASELINE | Ft Ht Ho Kk Ma Ny Wz Hh Total -------------------------------------------------- Ft| 103 31 19 86 45 81 56 421 Ht| 85 0 115 55 111 94 563 Ho| 99 28 35 20 29 327 Kk| 38 104 64 0 324 Ma| 130 184 69 650 Ny| 140 34 543 Wz| 56 656 Hh| 338 Number of 2-station scans: 214 Number of 3-station scans: 129 Number of 4-station scans: 90 Number of 5-station scans: 59 Number of 6-station scans: 12 Number of 7-station scans: 0 Number of 8-station scans: 0 Total number of scans: 504 Total number of obs: 1911 Total integrated obs-time: 393950 Average obs-time: 206.1 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: | 590| 198| 107| 68| 78| 51| 36| 41| 97| 153| 87| 102| 61| 66| 53| 16| 12| 22| 73 Average X-band SNRs by baseline | Ft Ht Ho Kk Ma Ny Wz Hh AVG ------------------------------------------------- Ft| 34 23 24 39 37 48 34 37 Ht| 32 - 43 44 56 58 45 Ho| 23 26 31 35 35 28 Kk| 25 32 33 - 28 Ma| 54 77 42 53 Ny| 71 44 50 Wz| 56 61 Hh| 47 Average S-band SNRs by baseline | Ft Ht Ho Kk Ma Ny Wz Hh AVG ------------------------------------------------- Ft| 24 21 20 19 18 21 21 21 Ht| 36 - 27 24 32 41 31 Ho| 32 21 19 23 31 29 Kk| 22 24 26 - 26 Ma| 23 28 24 25 Ny| 29 23 24 Wz| 29 28 Hh| 30 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode setup for: FORTLEZA HARTRAO HART15M HOBART26 KOKEE MATERA 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 Ht HART15M Mark5B Ho HOBART26 Mark5A Kk KOKEE Mark5B Ma MATERA 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 Ht Ho Kk Ma Ny Wz Ft Ht Ho Kk Ma Ny Wz Ht 20 Ht 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 Ny 20 20 20 20 20 Ny 15 15 15 15 15 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15 Hh 20 20 20 20 20 20 20 Hh 15 15 15 15 15 15 15 ===========================================================