Session Notes for rd1602 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. They will be observed in this session. In RD1602, we were able to schedule these 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 the sked flux catalog for all sources. Kokee and Wettzell will observe INT I16090 during the time from 1815 UT to 1945 UT. ----- Parameter listing -------------------------------------- Experiment: RD1602 Description R&D-03/2016 Scheduler: NASA Correlator: HAYS Start: 2016-090-17:30:00 End: 2016-091-17:30:00 Current yyyyddd: 2016090 (2016.25) ( 17478 MJD, WED. 30MAR.) Greenwich sidereal time: 06:04:07 (17:30:00 UT) Sun's RA and DEC: 0h 38.4m 4d 8.1 =========================================================== First observations Observation listing from file ./rd1602.skd for experiment RD1602 Source Start DURATIONS name yyddd-hhmmss Hh Ho Kb Kk Ny T6 Wz 3C274 16090-173000| 42 42 40 40 40 40| 1538+149 16090-173629| 40 40 40 40 40 | 2013+163 16090-174330| 98 46 77 98 40 | 2008-159 16090-174736| 40 40 40 | 2353+816 16090-174800| 48 40 48| 1736+324 16090-175226| 480 317 480 480 40 | 1908+484 16090-175449| 187 187| 0823-223 16090-175907| 50 50| End of listing. =========================================================== Last observations Observation listing from file ./rd1602.skd for experiment RD1602 Source Start DURATIONS name yyddd-hhmmss Hh Ho Kb Kk Ny T6 Wz 1736+324 16090-175226| 480 317 480 480 40 | 1908+484 16090-175449| 187 187| 0823-223 16090-175907| 50 50| 0454+844 16090-180132| 148 480 377 40 480| 0522-611 16090-180512| 160 160 | 0151+474 16090-181024| 107 107| End of listing. =========================================================== SKED Summary from file ./rd1602.skd for experiment RD1602 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 5.0 Min = 0.0 Max = 54.3 (Baseline Hh-Ho on 1022+194) RMS = 7.3 Total time: 1439 minutes ( 24.0 hours). Key: Hh=HARTRAO Ho=HOBART26 Kb=KASHIM34 Kk=KOKEE Ny=NYALES20 T6=TIANMA65 Wz=WETTZELL Hh Ho Kb Kk Ny T6 Wz Avg % obs. time: 38 50 44 46 47 18 39 40 % cal. time: 2 2 2 2 2 3 2 2 % slew time: 33 21 24 10 11 42 6 22 % idle time: 26 26 29 41 39 36 52 36 total # scans: 162 152 175 157 191 218 179 176 # scans/hour : 7 6 7 7 8 9 7 7 Avg scan (sec): 204 282 216 251 212 72 188 203 # data tracks: 32 32 32 32 32 32 32 # Mk5 tracks: 32 32 32 32 32 32 32 Total TB(M5): 2.1 2.7 2.4 2.5 2.6 1.0 2.2 2.2 # OF OBSERVATIONS BY BASELINE | Hh Ho Kb Kk Ny T6 Wz Total --------------------------------------------- Hh| 52 17 0 80 58 103 310 Ho| 96 83 25 106 13 375 Kb| 115 76 137 49 490 Kk| 70 105 48 421 Ny| 81 141 473 T6| 58 545 Wz| 412 Number of 2-station scans: 125 Number of 3-station scans: 154 Number of 4-station scans: 71 Number of 5-station scans: 38 Number of 6-station scans: 8 Number of 7-station scans: 0 Total number of scans: 396 Total number of obs: 1513 Total integrated obs-time: 243807 Average obs-time: 161.1 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: | 556| 179| 106| 69| 64| 46| 50| 43| 37| 15| 30| 40| 19| 22| 17| 11| 30| 22| 157Average X-band SNRs by baseline | Hh Ho Kb Kk Ny T6 Wz AVG -------------------------------------------- Hh| 22 27 - 29 69 36 37 Ho| 31 20 27 56 30 34 Kb| 25 32 102 36 50 Kk| 21 51 22 29 Ny| 90 48 44 T6| 119 80 Wz| 50 Average S-band SNRs by baseline | Hh Ho Kb Kk Ny T6 Wz AVG -------------------------------------------- Hh| 19 21 - 17 35 19 22 Ho| 24 23 16 30 18 24 Kb| 27 20 58 25 33 Kk| 19 40 21 28 Ny| 38 21 22 T6| 48 43 Wz| 25 =========================================================== Recording mode Name Code GEOSX8N 8F Recording mode for: HARTRAO HOBART26 KASHIM34 KOKEE NYALES20 TIANMA65 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 ID Station Tape length Density Passes Hh HARTRAO Mark5B Ho HOBART26 Mark5B Kb KASHIM34 K5 Kk KOKEE Mark5B Ny NYALES20 Mark5B T6 TIANMA65 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 Kb Kk Ny T6 Hh Ho Kb Kk Ny T6 Ho 20 Ho 15 Kb 20 20 Kb 15 15 Kk 20 20 20 Kk 15 15 15 Ny 20 20 20 20 Ny 15 15 15 15 T6 20 20 20 20 20 T6 15 15 15 15 15 Wz 20 20 20 20 20 20 Wz 15 15 15 15 15 15 ===========================================================