Session Notes for rd1611 Prepared by K. Le Bail, NVI, Inc./GSFC =========================================================== PURPOSE AND GENERAL NOTES =========================================================== GAIA proposal - Observation of : - 1 source in category 1 and 2 sources in category 2 with bad position uncertainties, - 1 source in category 1 and 4 sources in category 2 that were poorly observed in the past 24 months, - 1 source in category 3 that was not observed in the past 12 months, - 24 sources in category 4. 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 to improve their position accuracy. We noticed one source in category 1 and two sources in category 2 have position uncertainties between 100 and 200 microas. They will be observed in this session to improve their uncertainties. Also, five sources in categories 1 and 2 have been poorly observed in the past 24 months, and one source in category 3 was not observed at all in the past 12 months. This is probably due to the fact these sources are weak or they are in the Southern hemisphere. In RD1611, we were not able to schedule 3 out of the 33 sources total in the astro mode of sked, because the sources are weak (0316-444, 1908+484 and 2135-184). We used a maxscan value of 800 seconds. 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 for all sources. Kokee and Wettzell will observe INT I16334 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD1611 Description R&D-11/2016 Scheduler: NASA Correlator: HAYS Start: 2016-334-17:30:00 End: 2016-335-17:30:00 Current yyyyddd: 2016334 (2016.92) ( 17722 MJD, TUES 29NOV.) Greenwich sidereal time: 22:06:07 (17:30:00 UT) Sun's RA and DEC: 16h 24.7m -21d 37.8 =========================================================== First observations Observation listing from file ./rd1611.skd for experiment RD1611 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Km Ma Ny On Wz 1803+784 16334-173000| 47 49 40 49 40 40 40| 1128+385 16334-173148| 42 42 | 0716+714 16334-173324| 40 40 | 0420+022 16334-173423| 100 100 40 96 100 67| 2239+096 16334-174040| 625 312 526 373 625 273| 1022+194 16334-174847| 118 105 71 118 | End of listing. =========================================================== Last observations Observation listing from file ./rd1611.skd for experiment RD1611 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Km Ma Ny On Wz 2353-686 16335-171820| 141 141 90 | 0241+622 16335-171837| 40 40 40| 1215+303 16335-172104| 259 259 | 2227-088 16335-172241| 72 57 72 40| 0454-463 16335-172447| 40 40 40 | 0823-223 16335-172730| 49 49 40 | 3C418 16335-172750| 59 52 40 59 40| End of listing. =========================================================== SKED Summary from file ./rd1611.skd for experiment RD1611 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 3.4 Min = 0.0 Max = 68.6 (Baseline Ft-Kk on 0454-463) RMS = 5.9 Total time: 1439 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Km=KUNMING Ma=MATERA Ny=NYALES20 On=ONSALA60 Wz=WETTZELL Ft Hh Ho Kk Km Ma Ny On Wz Avg % obs. time: 26 51 59 52 53 65 66 54 55 53 % cal. time: 1 2 2 2 2 2 2 2 2 2 % slew time: 20 28 22 9 25 15 12 13 6 17 % idle time: 53 18 16 36 18 18 19 30 36 28 total # scans: 109 138 147 141 204 152 167 167 180 156 # scans/hour : 5 6 6 6 9 6 7 7 8 7 Avg scan (sec): 202 317 345 321 225 368 342 278 263 295 # data tracks: 32 32 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 32 32 Total TB(M5): 1.4 2.8 3.2 2.9 2.9 3.6 3.7 3.0 3.0 2.9 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Km Ma Ny On Wz Total ------------------------------------------------------- Ft| 52 15 16 11 45 34 63 47 283 Hh| 46 0 64 51 39 45 49 346 Ho| 62 87 16 20 13 20 279 Kk| 73 34 52 46 43 326 Km| 67 86 62 88 538 Ma| 106 103 117 539 Ny| 95 122 554 On| 101 528 Wz| 587 Number of 2-station scans: 155 Number of 3-station scans: 135 Number of 4-station scans: 55 Number of 5-station scans: 44 Number of 6-station scans: 30 Number of 7-station scans: 10 Number of 8-station scans: 0 Number of 9-station scans: 0 Total number of scans: 429 Total number of obs: 1990 Total integrated obs-time: 529198 Average obs-time: 265.9 Histogram of observation durations Dur: 40 80 120 160 200 240 280 320 360 400 440 480 520 560 600 640 680 720 760 800#Obs: | 729| 181| 91| 92| 84| 78| 77| 46| 51| 75| 43| 38| 55| 39| 40| 43| 38| 40| 150 Average X-band SNRs by baseline | Ft Hh Ho Kk Km Ma Ny On Wz AVG ------------------------------------------------------ Ft| 33 28 22 29 37 34 32 40 34 Hh| 31 - 35 39 35 36 43 36 Ho| 24 34 27 29 28 36 30 Kk| 29 28 35 27 34 29 Km| 40 49 38 53 40 Ma| 47 47 56 45 Ny| 47 59 46 On| 62 44 Wz| 52 Average S-band SNRs by baseline | Ft Hh Ho Kk Km Ma Ny On Wz AVG ------------------------------------------------------ Ft| 21 21 19 19 18 17 17 21 19 Hh| 32 - 29 23 23 21 26 25 Ho| 33 31 23 22 19 21 29 Kk| 31 24 29 25 29 29 Km| 24 29 23 31 28 Ma| 22 23 26 23 Ny| 22 26 24 On| 27 23 Wz| 27 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode for: FORTLEZA HARTRAO HOBART26 KOKEE KUNMING MATERA NYALES20 ONSALA60 WETTZELL Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 512 Mbits 128 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 8.00 MHz 1 32(*1) 32 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 =========================================================== 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 Km Ma Ny On Ft Hh Ho Kk Km Ma Ny On Hh 20 Hh 15 Ho 20 20 Ho 15 15 Kk 20 20 20 Kk 15 15 15 Km 20 20 20 20 Km 15 15 15 15 Ma 20 20 20 20 20 Ma 15 15 15 15 15 Ny 20 20 20 20 20 20 Ny 15 15 15 15 15 15 On 20 20 20 20 20 20 20 On 15 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 15 ===========================================================