APSG-9 (Asian Pacific Space Geodynamics-9) 2001 October 15 Notes prepared by Dr. Qian Zhihan, Shanghai Observatory Cynthia Thomas, NVI/GSFC Schedule name: APSG9.SKD on CDDISA Nominal Start: 16:00 U.T. on October 15 (day 288) first observation at 16:00 U.T. on 0235+164 Duration: 24 hours Nominal Stop: 16:00 U.T. on October 16 (day 289) last observation at 15:58 U.T. on 0235+164 for GC-HO-KK-SH-TS-UR Correlator: Washington **Frequency Sequence**: CDPSX - Standard CDP SX sequence. (360 MHz wide at X, 85 MHz wide at S) 1 letter 2 letter Station Code Code # of tapes # of obs Occupation Code Fairbanks A GC 1 (TT) 314 40476601 Hobart H HO 2 (HDT) 175 72425901 Kokee K KK 1 (TT) 371 72983001 Seshan C SH 1 (TT) 248 72336101 Tsukuba T TS 1 (TT) 362 73452301 Urumqi U UR 2 (HDT) 201 73303201 Purpose ======= The primary purpose of this Asian Pacific Space Geodesy (APSG) session is to continue monitoring the relative motions of the plates in the Asia-Pacific region. This session involves six sites on the four plates. Tsukuba and Fairbanks are on the North American Plate, Hobart is on the Australian Plate, Seshan and Urumqi are on the Eurasian Plate, and Kokee is on the Pacific Plate. Thus, this session will produce critical data for the investigation of the current crustal motions in the Asia-Pacific region combined with the data from the APSG SLR and GPS campaigns. Also, this experiment will improve the accuracy of the geocentric coordinates of the participating stations, especially Urumqi. Schedule ======== This is a new schedule generated by Guangli Wang with the automatic mode of sked. The following are the characteristics of the schedule: 1) This schedule was optimized for sky coverage. 2) Only the observations in the previous two hours of the schedule were considered for the minor options. The best 50% of the configurations were considered for minor options. 3) The "minor options" were set to select observations to maximize the total number of observations, to minimize the idle time between scans, and to minimize time between scans on the same source by thirty minutes. 5) The minimum SNR limits for all baselines were set to 20 for X-band and 15 for S-band. This schedule was made with the sked parameter MINSUBNET set to 2, which forces the use of sked routines that examine subnetting possibilities in detail. The resulting schedule has more observations, but fewer scans, compare to using parameter MINSUTNET set to 0. Simulation results are similar for both types of schedules, but usually more observations will give superior results. Procedures ========== Please generate the procedures for this session using drudg. Correlation ========== This experiment will be correlated at the Washington Correlator with all baselines being correlated. SKED Summary from file ../schedules/apsg9b.skd for experiment APSG9 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.9 Min = .0 Max = 30.9 (Baseline Gc-Kk on 2128-123) RMS = 6.0 Total time: 1440 minutes ( 24.0 hours). Key: Gc=GILCREEK Ho=HOBART26 Kk=KOKEE Sh=SESHAN25 Ts=TSUKUB32 Ur=URUMQI Gc Ho Kk Sh Ts Ur Avg % obs. time: 43 29 49 39 35 35 38 % cal. time: 3 2 4 2 4 2 3 % slew time: 21 32 17 40 16 20 24 % idle time: 31 36 28 17 43 42 33 # of tapes : .7 1.7 .8 .6 .6 2.0 total # scans: 314 175 371 248 362 201 278 # scans/hour : 13 7 15 10 15 8 11.6 Avg scan (sec): 118 144 115 137 84 150 124 # OF OBSERVATIONS BY BASELINE | Gc Ho Kk Sh Ts Ur StnTotal -------------------------------------- Gc|314 41 267 122 225 113 768 Ho| 175 116 112 122 61 452 Kk| 371 132 263 88 866 Sh| 248 213 174 753 Ts| 362 155 978 Ur| 201 591 Number of 2-station scans: 192 Number of 3-station scans: 149 Number of 4-station scans: 80 Number of 5-station scans: 86 Number of 6-station scans: 15 Total # of scans, observations: 522 2204 Average baseline components for all observations Average XY = 4403. Average XZ = 4113. Average YZ = 5027. Average length = 5836.