Session Notes for RD1106 Prepared by D. Behrend, NVI, Inc./GSFC =========================================================== 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 RD1106 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. The RD1106 schedule uses the R1 frequency setup. It was generated using SNRs of 20 at X-band and 15 at S-band for all stations but TIGO. For TIGO the SNR target was set to 18/12 (X/S). All stations have been fully scheduled; TIGO has been given extra weight. The schedule uses a selection of 120 sources from the good geodetic source list plus two extra sources with a closer angular distance to the Sun. There are four sources with an angular distance less than 15 deg to the Sun: 1602-115, 1622-253, 1657-261, and 1706-174. These four sources were tried to be scheduled about every full UT hour. Between the hours regular R1-type observing was scheduled. The limit for the angular distance to the Sun was set to 4 deg. This resulted in 17 observational scans with a distance to the Sun ranging from 4 deg to 15 deg. These scans are observed by subnets of the following six stations: Hh, Kk, Tc, Ts, Wf, and Wz. The remaining three stations (Ma, Ny, and On) have no scan close to the Sun. The source 1657-261 could not be scheduled. Scans with observations close to the Sun Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma Ny On Tc Ts Wf Wz ----------------------------------------------------------- 1622-253 11333-174726| 335 335 157 | 4.2 deg from sun 1622-253 11333-175418| 322 322 158 | 4.2 deg from sun 1622-253 11333-195418| 338 338 181 | 4.1 deg from sun 1622-253 11333-225950| 40 40 | 4.1 deg from sun 1622-253 11333-235353| 40 40 | 4.1 deg from sun 1622-253 11334-004753| 40 40 | 4.0 deg from sun 1622-253 11334-005414| 40 40 | 4.0 deg from sun 1622-253 11334-015510| 40 40 | 4.0 deg from sun 1622-253 11334-025419| 40 40 | 4.0 deg from sun 1602-115 11334-065613| 272 78 272| 10.8 deg from sun 1519-273 11334-073207| 70 70 57| 15.0 deg from sun 1602-115 11334-115228| 328 328 279| 10.9 deg from sun 1602-115 11334-125713| 294 294 257| 10.9 deg from sun 1706-174 11334-130348| 332 332 319| 11.5 deg from sun 1602-115 11334-135936| 285 285 267| 10.9 deg from sun 1706-174 11334-140602| 277 278 278| 11.4 deg from sun 1602-115 11334-145612| 320 326 326| 11.0 deg from sun 1706-174 11334-150313| 266 300 300| 11.4 deg from sun ----------------------------------------------------------- Sources with observations close to the Sun 4 chars/hour SOURCE | 0 3 6 9 12 15 18 21 | #SCANS #OBS #Obs/bl ---------------------------------------------------------------------------------------------------------- 1602-115| x x x x x | 5 15 4.1 1622-253| x x x x x x x| 9 15 4.1 1657-261| | 0 0 0.0 1706-174| x x x | 3 9 2.5 ---------------------------------------------------------------------------------------------------------- Total scans, obs: 17 39 Kokee and Wettzell will observe INT I11333 during the time from 1815 UT to 1945 UT. =========================================================== Experiment: RD1106 Description R&D-06 2011 Scheduler: NASA Correlator: HAYS Start: 2011-333-17:30:00 End: 2011-334-17:30:00 Current yyyyddd: 2011333 (2011.91) ( 15895 MJD, TUES 29NOV.) Greenwich sidereal time: 22: 3: 0.00 (17:30: 0 UT) Sun's RA and DEC: 16h 21.3m -21d 30.0 =========================================================== First observations Observation listing from file ./rd1106.skd for experiment RD1106 Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma Ny On Tc Ts Wf Wz 0716+714 11333-173000| 42 40 40 42 | 3C446 11333-173000| 57 92 126 126 46| ...... End of listing. =========================================================== Last observations Observation listing from file ./rd1106.skd for experiment RD1106 Source Start DURATIONS name yyddd-hhmmss Hh Kk Ma Ny On Tc Ts Wf Wz ...... 1324+224 11334-142718| 196 196 164| ...... 0727-115 11334-164815| 40 40 | ...... 1908-201 11334-171620| 152 152 91| 1520+319 11334-171833| 360 360 292| 2255-282 11334-172424| 70 70 48| 0119+041 11334-172644| 72 65 72 40| 3C446 11334-172915| 40 40 40 40| End of listing. =========================================================== SKED Summary from file ./rd1106.skd for experiment RD1106 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 4.0 Min = 0.0 Max = 90.0 (Baseline Ma-Ny on 1741-038) RMS = 7.8 Total time: 1440 minutes ( 24.0 hours). Key: Hh=HARTRAO Kk=KOKEE Ma=MATERA Ny=NYALES20 On=ONSALA60 Tc=TIGO Ts=TSUKUB32 Wf=WESTFORD Wz=WETTZELL Hh Kk Ma Ny On Tc Ts Wf Wz Avg % obs. time: 33 32 57 51 59 22 25 46 43 41 % cal. time: 2 3 4 4 4 1 4 3 4 3 % slew time: 38 15 24 19 20 1 18 14 12 18 % idle time: 26 49 14 25 15 75 52 36 40 37 total # scans: 197 232 351 356 350 88 367 279 381 289 # scans/hour : 8 10 15 15 15 4 15 12 16 12 Avg scan (sec): 145 119 140 124 147 212 59 142 98 131 # data tracks: 16 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 Total GBytes: 1027 993 1772 1591 1848 672 781 1424 1347 1273 Total GB(M5): 913 883 1575 1414 1643 597 694 1266 1197 1131 # of tapes : 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 9.0 Total GBytes (M5) recorded: 10182.7 # OF OBSERVATIONS BY BASELINE | Hh Kk Ma Ny On Tc Ts Wf Wz StnTotal ------------------------------------------------------- Hh| 0 134 81 110 38 62 87 155 667 Kk| 40 94 47 46 178 100 60 565 Ma| 247 310 28 155 161 274 1349 Ny| 267 14 199 167 252 1321 On| 19 166 169 266 1354 Tc| 16 61 24 246 Ts| 89 194 1059 Wf| 178 1012 Wz| 1403 Number of 2-station scans: 71 Number of 3-station scans: 250 Number of 4-station scans: 105 Number of 5-station scans: 112 Number of 6-station scans: 90 Number of 7-station scans: 27 Number of 8-station scans: 0 Number of 9-station scans: 0 Total # of scans, observations: 655 4488 =========================================================== Recording mode Name Code GEOSX SX Recording mode setup for: HARTRAO KOKEE MATERA NYALES20 ONSALA60 TIGOCONC 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 Hh HARTRAO Mark5B Kk KOKEE Mark5A Ma MATERA Mark5A Ny NYALES20 Mark5A On ONSALA60 Mark5A Tc TIGOCONC Mark5B 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) Hh Kk Ma Ny On Tc Ts Wf Hh Kk Ma Ny On Tc Ts Wf Kk 20 Kk 15 Ma 20 20 Ma 15 15 Ny 20 20 20 Ny 15 15 15 On 20 20 20 20 On 15 15 15 15 Tc 18 18 18 18 18 Tc 12 12 12 12 12 Ts 20 20 20 20 20 18 Ts 15 15 15 15 15 12 Wf 20 20 20 20 20 18 20 Wf 15 15 15 15 15 12 15 Wz 20 20 20 20 20 18 20 20 Wz 15 15 15 15 15 12 15 15 ===========================================================