APSG-1 (Asian Pacific Space Geodesy-1) 1997 October 6 Notes prepared by Dr. Qian Zhihan, Shanghai Observatory Cynthia Thomas, NVI/GSFC Schedule name: APSG1.SKD on CDDISA Nominal Start: 16:00 U.T. on October 6 (day 279) first observation at 16:00 U.T. on 0119+115 Duration: 24 hours Nominal Stop: 16:00 U.T. on October 7 (day 280) last observation at 15:52 U.T. on 0552+398 for UR last observation at 16:01 U.T. on OK290 for GC-KK last observation at 16:02 U.T. on 0454-234 for HO-KA-SH 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) 330 40476601 Hobart H HO 2 (HDT) 239 72425901 Kashima Q KA 3 (HDT) 295 18567601 Kokee K KK 1 (TT) 356 72983001 Seshan D SH 3 (HDT) 283 72336101 Urumqi U UR 3 (HDT) 263 73303201 Purpose ======= This is the first of two Asian Pacific Space Geodesy (APSG) experiments. The primary purpose of these APSG sessions are to monitor the relative motions of the plates in the Asia-Pacific region. These sessions involve sites on the four plates. Kashima and Fairbanks are on the North American Plate, Hobart is on the Australia Plate, Seshan and Urumqi are on the Eurasian Plate, and Kokee is on the Pacific Plate. Thus, these sessions 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 which will also be performed in October, 1997. 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. 7) The source models were updated as of the middle of August by Dave Shaffer. Procedures ========== There are no special procedures for this experiment. Please use your standard SGP procedures. Correlation ========== This experiment will be correlated at the Washington Correlator with all baselines being correlated. SKED Summary from file ./apsg1.skd for experiment APSG1 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x xx x xx x x x I 9 17 3.1 0048-097I xxx x x x x xx x x x x I 13 57 9.4 0059+581I xx xx x x x x x x x x x x xx x x x x x I 21 113 11.5 0104-408I x x x x xx xx x x x x x I 13 21 4.3 0119+115I xx x xx x xx xx x xx xx x I 16 103 14.0 0119+041I x x x x x x xx x I 9 11 1.5 0208-512I xx x x x x x x I 8 8 1.4 0229+131I x x x x I 4 8 1.0 0235+164I x I 1 1 .1 CTA26 I xx x x xx x x xx I 10 10 1.6 0402-362I xx x x x xx x xx x x x xx I 15 38 8.4 0454-234Ix x x xx xx x xx x x x xx xx I 17 48 10.1 0458-020I x x x x x x xx I 8 22 3.5 0528+134Ix x x x xxx x x x x x x x xx I 16 100 13.5 0537-441I x xxx I 4 6 1.3 0552+398I xx xx xx x x x x x x x xxx x x x x x x xx xI 25 96 11.4 0556+238I x x xx xx x x x x x xxI 13 87 11.6 0718+793Ix x x x x x x x x x x I 11 11 1.0 0727-115Ixx x x x xx xx x xx I 12 57 11.2 0749+540I x x x x x x x x xx xx x xx x x xx x I 20 102 11.0 0804+499I x I 1 1 .1 0805+410I xx x x x x xI 7 27 3.1 0823+033Ix x x x x x xx x x x x I 12 16 2.2 OJ287 I x x x I 3 3 .4 0919-260I I 0 0 .0 0920-397Ix x x I 3 3 1.3 4C39.25 I x xx xx x x x x xx x xI 13 47 5.8 OK290 I x x x x x xx x x x x x xI 13 15 1.5 0955+476I x x x x x x xx x x x x x I 13 33 3.7 1034-293I x xx x xx xx x x x xxI 13 31 6.7 1044+719I x x x x x x x x x x x x x x x x I 16 92 8.4 1053+815I x I 1 1 .1 1104-445I x xI 2 2 .3 1124-186Ix x xx x x x x x x I 10 24 4.9 1128+385Ix x x x x x x x xx x x xI 13 44 6.6 1144-379Ix x x xx x x x x x x xI 12 21 4.4 1219+044I I 0 0 .0 1255-316I I 0 0 .0 1300+580Ix x x x x x x x I 8 8 .7 1308+326I xx x x x x xx xx x xx x I 14 29 3.2 1313-333I x x xx x x x x x xI 10 22 4.8 1334-127I I 0 0 .0 1351-018Ix x x x x xx I 7 7 1.2 1357+769I x x x x x x x x x x x I 11 54 4.9 1424-418I x x xx x x x x x I 9 14 2.8 1451-375I xx x x xI 5 12 2.6 1606+106Ixxxx xx xx x x xx x x x x x I 17 96 13.2 1622-253I x x x I 3 3 .6 NRAO512 Ix xx x x xx xx xxx x x x x x x x x x xx x I 24 107 12.9 1726+455Ixx x x x x x I 7 11 1.2 1739+522I xxx x x x xxx x x x x x x x x x I 18 100 11.2 1741-038Ix xxx x x xx xxx x x x x xx I 17 87 14.0 1749+096I x x x x I 4 6 .8 1908-201I x x x x x I 5 11 2.9 1921-293I x xx x x xx xx xx xx x I 14 35 7.3 1954-388I xx x x xx x x xxx xx xx I 15 28 5.7 1958-179I x x x x xx x x x x I 10 31 6.5 2005-489I x I 1 1 .1 2052-474I I 0 0 .0 2121+053I xx xx xx I 6 6 .8 2128-123I x xx x x x I 6 8 2.9 2145+067I x xx xx x x xx x x I 11 54 7.7 2234+282I x x x x x x x x x x I 10 12 1.2 2255-282I x xx xx x I 6 8 2.2 Total scans, obs: 615 2026 Average number of obs. per baseline per source (normalized by up-time) = 4.6 Min = .0 Max = 31.1 (Baseline Gc-Kk on 2128-123) RMS = 5.8 Total time: 1444 minutes ( 24.1 hours). Key: Gc=GILCREEK Ho=HOBART26 Ka=KASHIMA Kk=KOKEE Sh=SESHAN25 Ur=URUMQI Gc Ho Ka Kk Sh Ur Avg % obs. time: 45 34 39 47 41 41 41 % cal. time: 3 2 3 4 3 3 3 % slew time: 21 29 23 17 42 26 26 % idle time: 29 34 33 30 13 29 28 # of tapes : .8 2.0 2.3 .8 2.5 2.4 total # scans: 330 239 295 356 283 263 294 # scans/hour : 13 9 12 14 11 10 12.3 Avg scan (sec): 119 123 115 116 125 135 122 # OF OBSERVATIONS BY BASELINE | Gc Ho Ka Kk Sh Ur StnTotal -------------------------------------- Gc|330 39 145 245 120 139 649 Ho| 239 134 133 116 77 711 Ka| 295 128 212 172 697 Kk| 356 96 72 593 Sh| 283 198 652 Ur| 263 750 Number of 2-station scans: 324 Number of 3-station scans: 121 Number of 4-station scans: 114 Number of 5-station scans: 37 Number of 6-station scans: 19 Total # of scans, observations: 615 2026 Average baseline components for all observations Average XY = 4220. Average XZ = 4382. Average YZ = 4973. Average length = 5856.