Session Notes for RD1205 Prepared by Jing. Sun, IGG, Vienna University of Technology =========================================================== PURPOSE AND GENERAL NOTES =========================================================== With the start of the IVS observing program in 2002 (based on the WG2 Report), sources were only scheduled when they had an angular distance to the Sun of more than 15 deg. Based on data from RDV and VCS experiments, Sebastien Lambert (Paris Observatory) expects that the inclusion of sources closer to the Sun can improve the determination of the post-Newtonian parameter gamma by 15% (even with a modest number of observations below 15 deg per session; for instance, 1-2 observations per session). The purpose of RD1205 is to provide observational data to support this claim and, if successful, to eventually change the general IVS scheduling to include one or two observations per session close to the Sun. This is the fifth session to support observations close to the Sun. The RD1205 schedule uses the R1 frequency setup. It was generated using SNRs of 20 at X-band and 15 at S-band for all stations. All stations have been fully scheduled. The schedule uses a selection of 120 sources from the good geodetic source list plus eight extra sources with a closer angular distance to the Sun. There are eight sources with an angular distance less than 15 deg to the Sun: 0656+082, 0657+172, 0722+145, 0743+259, 0743+277, 0745+241, 0748+126, and 0759+183. The limit for the angular distance to the Sun was set to 2 deg and a regular R1 scheduling was done. This resulted in 31 observational scans with a distance to the Sun ranging from 6.9 deg to 15.0 deg. These scans are observed by network of the following eight stations: Ft, Hh, Kk, Ma, Ny, Ts, Wf, Wz. The sources 0722+145 and 0743+259 could not be scheduled. Scans with observations close to the Sun Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ny Ts Wf Wz ------------------------------------------------------- 0748+126 12192-202001| 119 119 44 40 |11.9 deg from sun 0657+172 12192-223727| 91 65 40 91 | 7.1 deg from sun 0656+082 12192-230604| 49 49 |14.9 deg from sun 0657+172 12193-020130| 61 61 40 | 7.2 deg from sun 0743+277 12193-020257| 298 298 144 | 7.8 deg from sun 0656+082 12193-025815| 52 52 |14.9 deg from sun 0745+241 12193-062402| 181 181 50 102| 6.2 deg from sun 0657+172 12193-074746| 40 40 40 40| 7.4 deg from sun 0657+172 12193-084216| 173 173 | 7.4 deg from sun 0748+126 12193-095330| 43 40 43 |11.5 deg from sun 0657+172 12193-100831| 204 173 185 125 204 89| 7.4 deg from sun 0748+126 12193-101529| 40 40 40 40|11.5 deg from sun 0745+241 12193-103548| 191 209 209 109| 6.0 deg from sun 0748+126 12193-104026| 43 40 43 40|11.5 deg from sun 0657+172 12193-104419| 185 173 185 125 89| 7.4 deg from sun 0657+172 12193-110847| 185 185 125 168 89| 7.4 deg from sun 0748+126 12193-111242| 43 40 43 40 40 40|11.5 deg from sun 0745+241 12193-111449| 175 192 179 192 100| 6.0 deg from sun 0748+126 12193-113641| 40 40 40 40|11.5 deg from sun 0657+172 12193-114001| 185 185 125 162 89| 7.5 deg from sun 0748+126 12193-120616| 43 40 43 40 40 40|11.5 deg from sun 0657+172 12193-122724| 173 173 | 7.5 deg from sun 0748+126 12193-124056| 40 40 |11.4 deg from sun 0748+126 12193-130931| 40 40 |11.4 deg from sun 0657+172 12193-131139| 173 173 | 7.5 deg from sun 0657+172 12193-141401| 185 173 185 127 152 91| 7.5 deg from sun 0759+183 12193-141828| 344 344 230| 9.8 deg from sun 0748+126 12193-144311| 43 40 43 40 40 40|11.4 deg from sun 0748+126 12193-152258| 40 40 40 40 |11.4 deg from sun 0748+126 12193-155923| 43 43 40 40 40|11.4 deg from sun 0748+126 12193-172817| 151 151 43 40 40 |11.3 deg from sun ------------------------------------------------------- Sources with observations close to the Sun (indicated by an 'x') 4 chars/hour SOURCE | 0 3 6 9 12 15 18 21 | #SCANS #OBS #Obs/bl ---------------------------------------------------------------------------------------------------------- 0656+082| x x | 2 2 0.0 0657+172| x x x x x x x x x x x | 11 78 0.0 0743+277| x | 1 3 0.0 0745+241| x x x | 3 22 0.0 0748+126| x x xx x x x x x x x x x| 13 100 0.0 0759+183| x | 1 3 0.0 ---------------------------------------------------------------------------------------------------------- Total scans, obs: 31 208 Kokee and Wettzell will observe INT IN112-192 during the time from 1815 UT to 1945 UT. =========================================================== ----- Parameter listing -------------------------------------- Experiment: RD1205 Description R&D-05 2012 Scheduler: TUW Correlator: HAYS Start: 2012-192-17:30:00 End: 2012-193-17:30:00 Current yyyyddd: 2012192 (2012.52) ( 16119 MJD, TUE. 10JUL.) Greenwich sidereal time: 12:46:00.00 (17:30:00 UT) Sun's RA and DEC: -5h 21.6m 22d 6.7m =========================================================== First observations Observation listing from file ./rd1205.skd for experiment RD1205 Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ny Ts Wf Wz 0716+714 12192-173216| 85 138 138 41 136 82| 1424-418 12192-173307| 126 126 | ...... End of listing. =========================================================== Last observations Observation listing from file ./rd1205.skd for experiment RD1205 Source Start DURATIONS name yyddd-hhmmss Ft Hh Kk Ma Ny Ts Wf Wz ...... 0748+126 12193-172817|151 151 43 40 40 | 1520+437 12193-173136| 326 107 326| End of listing. =========================================================== SKED Summary from file ./rd1205.skd for experiment RD1205 (all scans with at least one subnet station) Calculating rise/set times: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 ... done. Average number of obs. per baseline per source(normalized by up-time) = 3.6 Min = 1 Max = 21 (Baseline Kk-Ts on 2229+695 ) RMS = 5.4 Total time: 1440 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Kk=KOKEE Ma=MATERA Ny=NYALES20 Ts=TSUKUB32 Wf=WESTFORD Wz=WETTZELL Ft Hh Kk Ma Ny Ts Wf Wz Avg % obs. time: 33 38 35 58 53 25 56 40 42 % cal. time: 2 3 3 4 4 4 4 4 3 % slew time: 30 41 13 25 20 14 16 10 21 % idle time: 34 19 49 13 23 58 24 47 33 total # scans: 194 193 223 301 314 299 307 302 267 # scans/hour : 9 9 10 13 14 13 13 13 12 Avg scan (sec): 142 147 134 159 140 66 151 109 131 Total number of tapes: 8.0 Total GBytes (M5) recorded: 11375.5 # OF OBSERVATIONS BY BASELINE | Ft Hh Kk Ma Ny Ts Wf Wz StnTotal ----------------------------------------------------- Ft| 118 25 80 44 18 79 51 804 Hh| 0 85 44 24 63 73 770 Kk| 84 114 165 118 75 1301 Ma| 207 145 202 222 2431 Ny| 188 214 236 2473 Ts| 128 144 1821 Wf| 195 2342 Wz| 2353 Number of 2-station scans: 221 Number of 3-station scans: 119 Number of 4-station scans: 123 Number of 5-station scans: 112 Number of 6-station scans: 47 Number of 7-station scans: 0 Number of 8-station scans: 0 Total # of scans, observations: 622 3141 =========================================================== Recording mode Name Code GEOSX SX Recording mode setup for: FORTLEZA HARTRAO KOKEE MATERA NYALES20 TSUKUB32 WESTFORD WETTZELL Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 256.000 Mbits 128.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 8.00 MHz 1 16(*2) 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 channels recorded per sub-pass X S Total 10.000 6.000 16.000 =========================================================== Tape types ID Station Tape length Density Passes Ft FORTLEZA MARK5A Hh HARTRAO MARK5B Kk KOKEE Mark5A Ma MATERA Mark5A Ny NYALES20 Mark5A Ts TSUKUB32 K5 Wf WESTFORD Mark5A Wz WETTZELL Mark5A =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 0) S-band (margin 0) Ft Hh Kk Ma Ny Ts Wf Ft Hh Kk Ma Ny Ts Wf Hh 20 Hh 15 Kk 20 20 Kk 15 15 Ma 20 20 20 Ma 15 15 15 Ny 20 20 20 Ny 15 15 15 Ts 20 20 20 20 20 Ts 15 15 15 15 15 Wf 20 20 20 20 20 20 Wf 15 15 15 15 15 15 Wz 20 20 20 20 20 20 20 Wz 15 15 15 15 15 15 15 ===========================================================