APSG-3 (Asian Pacific Space Geodesy-3) 1998 November 5 Notes prepared by Dr. Qian Zhihan, Shanghai Observatory Cynthia Thomas, NVI/GSFC Schedule name: APSG3.SKD on CDDISA Nominal Start: 20:30 U.T. on November 5 (day 309) first observation at 20:30 U.T. on 1357+769 Duration: 24 hours Nominal Stop: 20:30 U.T. on November 6 (day 310) last observation at 20:26 U.T. on NRAO512 for GC-KK last observation at 20:28 U.T. on 0727-115 for 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) 369 40476601 Kokee K KK 1 (TT) 382 72983001 Seshan D SH 3 (HDT) 307 72336101 Tsukuba T TS 1 (TT) 397 73452301 Urumqi U UR 3 (HDT) 306 73303201 Purpose ======= This is first of the second group of two Asian Pacific Space Geodesy (APSG) experiments. The primary purpose of these APSG sessions is to continue monitoring the relative motions of the plates in the Asia-Pacific region. These sessions involve 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, 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 November 1998. Also, these experiments will improve the accuracy of the geocentric coordinates of the participating stations, especially Urumqi and Tuskuba. Station Information =================== Tsukuba, the new Japanese station operated by GSI, will replace Kashima in this network. Kashima participated in the previous two APSG experiments but Tsukuba is more sensitive and will make the APSG network more robust. 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 ================ Several years ago John Gipson wrote a program called snranal which compares the measured performance of an experiment with respect to the predicted. One of the things this program calculates is an empirical flux density for each source. Recently J. Gipson compared the fluxes generated by this program with those from more careful modeling. The agreement is generally good (~15%) for those sources which have been observed more than 20 times. In order to account for changes in the flux catalog since the last update, J. Gipson adjusted the fluxes in the flux catalog for the sources in the current source catalog using the 98AUG11 CORE-A042, 98AUG17 EURO44, and 98AUG25 experiments. 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 ./apsg3.skd for experiment APSG3 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x xx x x x x x x x x x I 12 26 6.4 0048-097I x x x x x I 5 11 3.6 0059+581I x xx x x x xx x x x x x x x xx xx xx x xI 23 131 15.6 0104-408I x x x x x xx I 7 7 4.0 0119+115I x x x x x x xx x x I 10 18 3.3 0119+041I x x x xx xx x x x x x I 12 25 5.2 0208-512I I 0 0 .0 0229+131I x x x x x x x x x x I 10 28 5.2 0235+164I x x x x x I 5 5 .9 CTA26 I x x x x xx xxx x x I 11 25 5.9 0402-362I x x xx x x x I 7 9 4.5 0454-234I x x xxx x x xx x I 10 21 9.0 0458-020I x xx x x x x x I 8 21 4.9 0528+134I x x x xxx xxxx x xx xx x x x x I 19 82 15.0 0537-441I x I 1 1 .7 0552+398I xx xx x x x x x xxxx x x x x x x x x xxx xI 25 110 15.1 0556+238Ix x x x x x x x x I 9 16 2.5 0718+793I x x x x x x x x x x x I 11 33 3.3 0727-115I xx xx x x xxx xx xx x I 14 41 15.2 0749+540I x x xx x x x x x x x x x x x x x xI 18 113 14.0 0804+499Ix x x x xx x x x I 9 26 3.3 0805+410Ix x x x x x x x x I 9 9 1.0 0823+033Ixx x x x xx x x x x x I 12 23 4.9 OJ287 I x x x x x I 5 5 .9 0919-260Ix x x x x xx x I 8 10 4.6 0920-397I x x x I 3 5 3.0 4C39.25 Ixx x x x x x xx x x xx xx x x xx x x I 21 97 13.7 OK290 I x x x x x x x x xx x x x x I 14 30 4.7 0955+476I x x x x x x xx x I 9 24 3.1 1034-293I xx x x x I 5 9 4.3 1044+719I x x x xx x x x x x x xI 12 100 10.4 1053+815I I 0 0 .0 1104-445I x x xI 3 3 1.9 1124-186Ix x x x x x x x I 8 17 7.0 1128+385I x xx x x x x I 7 9 1.0 1144-379I x x x x x I 5 7 3.8 1219+044I x x x x x xx x I 8 14 2.9 1255-316I x x I 2 4 2.0 1300+580Ix x x x x x x x x x x x I 12 26 3.0 1308+326I xx x x x x x x x x x xx xx x x xI 18 45 6.5 1313-333I x x x x xI 5 9 4.4 1334-127Ixxx x x x xx x I 9 22 10.5 1351-018I x x x xx x I 6 12 2.7 1357+769I x x x x x x x x x x I 10 100 10.0 1424-418Ix x x I 3 3 1.8 1451-375Ix x x I 3 3 1.6 1606+106Ixx xx x x x x x xx x x xx x x xx xI 20 41 7.7 1622-253Ixx x x x x x I 7 9 3.9 NRAO512 I x xxx x x x xx x xxx xx x x x xx xx xx xxI 26 104 14.4 1726+455I x x x x I 4 4 .4 1739+522I x x x xx x x x x x x xxx x x x xx x x xx xI 24 110 13.7 1741-038Ix x xxxx x xxx x x xx x xx x x xI 20 60 14.3 1749+096Ix x x x x x x x x I 9 24 4.7 1908-201I x x x x x xx xxx x x I 12 18 7.6 1921-293I x x x x x x x I 7 13 6.1 1954-388I x x x x x x x I 7 9 4.8 1958-179I x xx x x I 5 7 2.9 2005-489I I 0 0 .0 2052-474I x x I 2 2 1.4 2121+053I xx x x x x x xx xx x x x x x I 16 48 9.7 2128-123I x x xxxx xx xx xx x I 13 29 9.9 2145+067I xx x x x x x x x x x x I 12 21 4.2 2234+282I xx x xxxxx x x xx x xx I 15 43 6.5 2255-282I x xxx x x x x x I 9 13 6.1 Total scans, obs: 631 1890 Average number of obs. per baseline per source (normalized by up-time) = 6.1 Min = .0 Max = 38.9 (Baseline Gc-Kk on 1334-127) RMS = 6.3 Total time: 1439 minutes ( 24.0 hours). Key: Gc=GILCREEK Kk=KOKEE Sh=SESHAN25 Ts=TSUKUB32 Ur=URUMQI Gc Kk Sh Ts Ur Avg % obs. time: 41 45 37 36 38 40 % cal. time: 4 4 3 4 3 4 % slew time: 23 18 45 12 28 25 % idle time: 30 31 14 46 29 30 # of tapes : .7 .8 2.3 .7 2.3 total # scans: 369 382 307 397 306 352 # scans/hour : 15 15 12 16 12 14.7 Avg scan (sec): 97 103 104 80 109 98 # OF OBSERVATIONS BY BASELINE | Gc Kk Sh Ts Ur StnTotal ---------------------------------- Gc|369 305 126 203 142 672 Kk| 382 118 245 99 838 Sh| 307 212 237 811 Ts| 397 203 708 Ur| 306 751 Number of 2-station scans: 321 Number of 3-station scans: 193 Number of 4-station scans: 45 Number of 5-station scans: 72 Total # of scans, observations: 631 1890 Average baseline components for all observations Average XY = 4677. Average XZ = 3190. Average YZ = 3980. Average length = 5061.