Session Notes for APSG (Asian Pacific Space Geodynamics) session: apsg14 Prepared by Dr. Guangli Wang, SHA/CAS and C. Thomas, NVI, Inc./GSFC =========================================================== The primary purpose of this Asian Pacific Space Geodynamics (APSG) session is to continue monitoring the relative motions of the plates in the Asia-Pacific region. This session involves five sites on the four plates. Fairbanks is 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. =========================================================== Parameter values for experiment APSG14 Experiment description: APSG Scheduler: SHA Please see master schedule Nominal start: 2004-259-18:00:00 Nominal end: 2004-260-18:00:00 Current yyyyddd: 2004259 (2004.71) ( 13264 MJD, WED. 15SEP.) Greenwich sidereal time: 17:40: 8.00 (18: 0: 0 UT) Sun's RA and DEC: 11h 35.1m 2d 41.4 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Gc Ho Kk Sh Ts Ur 0235+164 04259-180000| 136 136 107 107 70 70| =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Gc Ho Kk Sh Ts Ur 1308+326 04260-174525| 70 70 | 0454-234 04260-174842| 70 70 70 70 | 2209+236 04260-175112| 142 142| 0208-512 04260-175224| 70 70 | 2255-282 04260-175531| 70 70| =========================================================== SKED Summary from file ./apsg14.skd for experiment APSG14 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 6.1 Min = .0 Max = 36.0 (Baseline Gc-Ur on 3C446 ) RMS = 7.0 Total time: 1436 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: 50 21 45 44 31 31 37 % cal. time: 3 1 3 3 3 3 3 % slew time: 17 25 14 38 14 24 22 % idle time: 29 51 36 13 50 40 37 total # scans: 281 139 287 265 325 287 264 # scans/hour : 11.7 5.8 12.0 11.1 13.6 12.0 11.0 Avg scan (sec): 154 131 136 145 82 95 123 Total GBytes: 362 154 330 324 237 237 275 Total GB(M5): 368 156 335 330 241 241 279 # of tapes : 1.3 .6 1.2 1.2 .8 .9 tape change times (hhmm): 1215 0000 1403 1405 0000 0000 Total number of tapes: 6.0 Total GBytes (M5) recorded: 1673.9 # OF OBSERVATIONS BY BASELINE | Gc Ho Kk Sh Ts Ur StnTotal -------------------------------------- Gc|281 50 230 174 231 203 888 Ho| 139 98 93 104 75 420 Kk| 287 170 226 168 892 Sh| 265 251 226 914 Ts| 325 255 1067 Ur| 287 927 Number of 2-station scans: 107 Number of 3-station scans: 60 Number of 4-station scans: 97 Number of 5-station scans: 128 Number of 6-station scans: 27 Total # of scans, observations: 419 2554 =========================================================== Recording mode Name Code CDP-SX SX Recording mode setup for: GILCREEK HOBART26 KOKEE SESHAN25 TSUKUB32 URUMQI Mode Tot.Rate Tot.BandW #chan #bits Barrel C 56.000 Mbits 28.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 2 14(*0) 28 135.00 X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 85.0 MHz rms spanned bw= 33.1 MHz Effective number of channels recorded per sub-pass X S Total 8.000 6.000 14.000 =========================================================== Minor Options Option Norm Wt Aux_Parm BegScan Rel 1.00 EndScan Rel 1.00 NumObs Rel 1.00 =========================================================== Major Options SkyCov Yes Min_Between 30 Best% 50.0 Last_Hrs 2.00 Add_ps 30.00 Obs_Wts SNRwt =========================================================== Tape types ID Station Tape length Density Passes Gc GILCREEK 17400feet (Thin ) 33333 (Low ) 12 Ho HOBART26 17400feet (Thin ) 33333 (Low ) 12 Kk KOKEE 17400feet (Thin ) 33333 (Low ) 12 Sh SESHAN25 17400feet (Thin ) 33333 (Low ) 12 Ts TSUKUB32 17400feet (Thin ) 33333 (Low ) 12 Ur URUMQI 17400feet (Thin ) 33333 (Low ) 12 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 0) S-band (margin 0) Gc Ho Kk Sh Ts Gc Ho Kk Sh Ts Ho 20 Ho 15 Kk 20 20 Kk 15 15 Sh 20 20 20 Sh 15 15 15 Ts 20 20 20 20 Ts 15 15 15 15 Ur 20 20 20 20 20 Ur 15 15 15 15 15