APSG-7 (Asian Pacific Space Geodesy-7) 2000 October 2 Notes prepared by Dr. Qian Zhihan, Shanghai Observatory Cynthia Thomas, NVI/GSFC Schedule name: APSG7.SKD on CDDISA Nominal Start: 16:00 U.T. on October 2 (day 276) first observation at 16:00 U.T. on 0119+115 Duration: 24 hours Nominal Stop: 16:00 U.T. on October 3 (day 277) last observation at 15:42 U.T. on 0119+115 for GC-KK-UR last observation at 15:53 U.T. on 0104-408 for HO-SH-TS 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) 256 40476601 Hobart H HO 2 (HDT) 154 72425901 Kokee K KK 1 (TT) 301 72983001 Seshan C SH 2 (HDT) 220 72336101 Tsukuba T TS 1 (TT) 322 73452301 Urumqi U UR 3 (HDT) 174 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 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 C. Thomas 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 most baselines were set to 20 for X-band and 15 for S-band. 6) This schedule was made using 64 sources which helped improve the sky coverage. Flux Information ================ Program snranal compares the measured performance of a session with respect to the predicted. The program calculates an empirical flux density for each source. In order to account for changes in the flux catalog since the last update based on source modeling, the fluxes in the flux catalog for the sources in the current source catalog were adjused using the following databases: Date Session ==== ========= 00APR04 NEOS-A362 00APR11 NEOS-A363 00APR18 NEOS-A364 00APR18 CORE-A083 00APR24 IRIS-S149 00APR25 NEOS-A365 00MAY02 NEOS-A366 00JUN06 NEOS-A371 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 ./apsg7.skd for experiment APSG7 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I xx xx xx x x xx x x x x I 14 74 12.2 0048-097I x x x x x I 5 26 4.7 0059+581I x x x x x x x x x x I 10 28 3.0 0104-408I xx x x x x x xx x I 10 28 5.8 0106+013I x x x x I 4 13 1.9 0119+115I xx x x xx x xx x x xxx x x x x I 18 138 18.8 0119+041I x x xx I 4 19 2.8 0208-512I I 0 0 .0 0229+131I x I 1 1 .1 0235+164I x I 1 10 1.3 0402-362I x I 1 1 .3 0454-234Ix x x x xx x x x xx x xI 13 63 13.4 0458-020I x xx x x x x x xx x x I 12 91 14.3 0528+134Ix x x x xx xx x x x xx x I 14 34 4.1 0537-441I x x x xx x x x I 8 19 3.9 0552+398Ix x x x x x x x xx x x x x x x x x xI 19 119 15.0 0556+238I x I 1 1 .1 0718+793I x I 1 3 .3 0727-115I xx x x x xx xxx xxI 12 97 20.6 0749+540I x x x x x x x x x x x x x x x x I 16 127 14.4 0804+499I x I 1 1 .1 0805+410I x xI 2 20 2.6 0823+033I x x x x xx x I 7 21 3.0 OJ287 Ix x x x x x xI 7 17 1.9 0919-260I x I 1 1 .2 0920-397I x x I 2 2 .6 4C39.25 I x x x x x xx x x x x x x x x x xx xx xI 21 117 18.3 OK290 I x I 1 1 .1 0955+476I x x x x I 4 32 3.8 1034-293I xx x I 3 3 .5 1044+719Ix x x x x x x x x I 9 61 5.8 1053+815I x x x x x x x x I 8 24 2.2 1104-445I I 0 0 .0 1124-186Ixx xx x x x x x x x I 11 66 14.0 1128+385I x x x x x x I 6 43 6.8 1144-379Ix x x x x x x x I 8 29 6.3 1219+044I I 0 0 .0 1255-316I x I 1 1 .3 1300+580I x x I 2 2 .2 1313-333I I 0 0 .0 1334-127I x x xx x x x I 7 20 5.0 1351-018I x x x xx I 5 9 1.5 1357+769I x x x x x x x x x x I 10 100 9.1 1424-418I x x x x x x x x x x I 10 26 5.4 1451-375I x I 1 1 .3 1606+106Ix xx xxx xxx x x x x x xx x x I 18 140 19.0 1622-253I x x x I 3 3 .5 NRAO512 I x x x xI 4 8 .9 1726+455I x x I 2 2 .2 1739+522Ix x x x x x x x x I 9 25 2.7 1741-038I x xx x xx xx x x x I 11 42 6.8 1749+096I xx x x I 4 21 3.1 1908-201I x x x x I 4 17 3.9 1921-293I x x x x x I 5 7 1.9 1954-388I x x I 2 2 .4 1958-179I xx x x x x x x x x I 10 51 10.8 2005-489I I 0 0 .0 2052-474I I 0 0 .0 2121+053I xx x x xx I 6 8 1.1 2128-123I x x x x x x I 6 10 3.7 2134+00 I xx x x I 4 4 .6 2145+067I x xx xx xx xx x x x x I 13 96 13.5 2234+282I x x xx xx xx xxx x x x x x x x x I 19 95 9.9 2255-282I x xx x I 4 4 1.0 Total scans, obs: 415 2024 Average number of obs. per baseline per source (normalized by up-time) = 5.1 Min = .0 Max = 29.4 (Baseline Ho-Kk on 4C39.25 ) RMS = 7.2 Total time: 1434 minutes ( 23.9 hours). Key: Gc=GILCREEK Ho=HOBART26 Kk=KOKEE Sh=SESHAN25 Ts=TSUKUB32 Ur=URUMQI Gc Ho Kk Sh Ts Ur Avg % obs. time: 34 23 37 31 27 27 30 % cal. time: 2 1 3 2 3 1 2 % slew time: 18 31 17 45 16 19 24 % idle time: 44 43 41 19 52 51 42 # of tapes : .6 1.4 .7 2.0 .5 1.7 total # scans: 256 154 301 220 322 165 236 # scans/hour : 10 6 12 9 13 6 9.8 Avg scan (sec): 115 130 106 124 74 143 115 # OF OBSERVATIONS BY BASELINE | Gc Ho Kk Sh Ts Ur StnTotal -------------------------------------- Gc|256 47 223 119 199 93 681 Ho| 154 104 108 129 62 450 Kk| 301 132 236 80 775 Sh| 220 200 153 712 Ts| 322 139 903 Ur| 165 527 Number of 2-station scans: 124 Number of 3-station scans: 112 Number of 4-station scans: 79 Number of 5-station scans: 82 Number of 6-station scans: 18 Total # of scans, observations: 415 2024 Average baseline components for all observations Average XY = 4381. Average XZ = 4191. Average YZ = 5129. Average length = 5913.