Session Notes for crf105 Prepared by K. Le Bail, NVI, Inc./GSFC and Alet de Witt, HartRAO ================================================================ PURPOSE AND GENERAL NOTES ================================================================ The purpose of this CRF session is to perform astrometric observations in order to strenghten the ICRF in the southern sky. The scheduling technique basically continues the technique used by Alan Fey in previous CRF sessions; however, this session uses ten additional sources in the south provided by Alet de Witt. The scheduling strategy follows the template of previous CRF sessions: the scan length is 7 minutes for each source with a default flux value of 0.50 Jy in both X- and S-band. The source list (43 sources) is the source list of CRF102. It was modified by replacing ten of the sources by ten other sources that had less than ten observations (as found in the most recent S/X catalog) as well as K-band and Ka-band sources not in the S/X catalog but that are potential targets. ================================================================ ----- Parameter listing -------------------------------------- Experiment: CRF105 Description tbd Scheduler: NASA Correlator: WASH Start: 2018-051-17:30:00 End: 2018-052-17:30:00 Current yyyyddd: 2018051 (2018.14) ( 18170 MJD, TUES 20FEB.) Greenwich sidereal time: 03:32:23 (17:30:00 UT) Sun's RA and DEC: 22h 16.1m -10d 45.1 =========================================================== First observations Observation listing from file ./crf105.skd for experiment CRF105 Source Start DURATIONS name yyddd-hhmmss Ht Ho K1 Ke Kk Nt Yg 0048-097 18051-173000| 420 420 | 1406-076 18051-173000| 420 420 420 420 420| 1256-220 18051-173819| 420 420 420 420| 0402-362 18051-173835| 420 420 | 0116-219 18051-174651| 420 420 | 1502+106 18051-174704| 420 420 420 420 420| End of listing. =========================================================== Last observations Observation listing from file ./crf105.skd for experiment CRF105 Source Start DURATIONS name yyddd-hhmmss Ht Ho K1 Ke Kk Nt Yg 0048-097 18052-170159| 420 420 | 1236+077 18052-170306| 420 420 420 420 420| 0215+015 18052-171002| 420 420 | 1406-076 18052-171132| 420 420 420 420 420| 0332-403 18052-171825| 420 420 | 1622-253 18052-172008| 420 420 420 420 420| End of listing. =========================================================== SKED Summary from file ./crf105.skd for experiment CRF105 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 7.3 Min = 0.0 Max = 44.6 (Baseline Ht-Nt on 0008-264) RMS = 4.7 Total time: 1437 minutes ( 24.0 hours). Key: Ht=HART15M Ho=HOBART26 K1=KASHIM11 Ke=KATH12M Kk=KOKEE Nt=NOTO Yg=YARRA12M Ht Ho K1 Ke Kk Nt Yg Avg % obs. time: 73 76 70 77 55 60 76 70 % cal. time: 2 2 2 2 1 1 2 2 % slew time: 9 20 3 5 4 11 5 9 % idle time: 15 1 25 15 39 26 16 20 total # scans: 150 157 143 158 112 124 155 142 # scans/hour : 6 7 6 7 5 5 6 6 Avg scan (sec): 420 420 420 420 420 420 420 420 # data tracks: 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 Total TB(M5): 1.01 1.06 0.96 1.06 0.75 0.83 1.04 0.96 # OF OBSERVATIONS BY BASELINE | Ht Ho K1 Ke Kk Nt Yg Total --------------------------------------------- Ht| 47 43 49 0 124 59 322 Ho| 130 156 105 25 143 606 K1| 132 97 19 119 540 Ke| 104 27 145 613 Kk| 0 94 400 Nt| 36 231 Yg| 596 Number of 2-station scans: 99 Number of 3-station scans: 15 Number of 4-station scans: 25 Number of 5-station scans: 112 Number of 6-station scans: 16 Number of 7-station scans: 0 Total number of scans: 267 Total number of obs: 1654 Total integrated obs-time: 694680 Average obs-time: 420.0 Average X-band SNRs by baseline | Ht Ho K1 Ke Kk Nt Yg AVG -------------------------------------------- Ht| 39 14 22 - 48 20 33 Ho| 14 21 33 46 20 24 K1| 8 12 17 7 11 Ke| 18 26 11 16 Kk| - 16 20 Nt| 23 39 Yg| 15 Average S-band SNRs by baseline | Ht Ho K1 Ke Kk Nt Yg AVG -------------------------------------------- Ht| 33 25 19 - 45 21 32 Ho| 20 16 39 35 17 23 K1| 12 29 27 12 18 Ke| 23 21 10 15 Kk| - 24 29 Nt| 22 36 Yg| 16 =========================================================== Recording mode Name Code CDP-SX SX Recording mode for: HART15M HOBART26 KASHIM11 KATH12M NOTO YARRA12M Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:2 128 Mbits 64 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 4.00 MHz 1 16(*2) 32 X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 85.0 MHz rms spanned bw= 33.1 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 10.00 6.00 16.00 Recording mode for: KOKEE Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 128 Mbits 64 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 4.00 MHz 1 16(*1) 16 X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 85.0 MHz rms spanned bw= 33.1 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 10.00 6.00 16.00 =========================================================== Tape types ID Station Tape length Density Passes Ht HART15M Mark5B Ho HOBART26 Mark5B K1 KASHIM11 K5 Ke KATH12M Mark5B Kk KOKEE Mark5B Nt NOTO Mark5B Yg YARRA12M Mark5B =========================================================== 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) Ht Ho K1 Ke Kk Nt Ht Ho K1 Ke Kk Nt Ho 14 Ho 12 K1 12 12 K1 10 10 Ke 14 14 12 Ke 12 12 10 Kk 14 14 12 14 Kk 12 12 10 12 Nt 14 14 12 14 14 Nt 12 12 10 12 12 Yg 14 14 12 14 14 14 Yg 12 12 10 12 12 12 ===========================================================