JADE-0709 (Japanese Dynamic Earth observation by VLBI) 2007 September 13-14 Notes prepared by machida@gsi.go.jp Geographical Survey Institute, Japan Session JD0709 Start 2007-256 02:00:00 September 13 End 2007-257 01:56:08 September 14 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 S3 J SINTOTU3 5 Vm M VERAMZSW 6 Vs S VERAISGK Duration: 24 hours Correlator: TSUKUBA(GSI) PURPOSE ======= The purpose of the JADE sessions is to monitor the plate motion and the local crustal movement around Japan. In 2007 fiscal year, JADE session will be carried out once a month. NETWORK ======= The standard configuration of the JADE projests consists of some stations. Code : Station Ts Tsukuba Ai Aira Cc Chichijima S3 Shintotsukawa Vm VERA Mizusawa Vs VERA Ishigakijima SCHEDULE ======== This schedule was made by machida@gsi.go.jp using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 0 sec Minimum scan length 40 sec Maximum scan length 784 sec Minimum SNR by baseline for multi-baseline scans X-band (margin 8) S-band (margin 8) Ts Ai Cc S3 Vm Ts Ai Cc S3 Vm Ai 18 Ai 16 Cc 18 16 Cc 16 15 S3 18 0 0 S3 16 0 0 Vm 18 18 18 0 Vm 16 16 16 0 Vs 18 18 18 0 18 Vs 16 16 16 0 16 Automatic scheduling setup: optimize for uniform sky coverage at all stations, maximize the number of observations, minimize slewing time, minimize time between scans, consider the top 30% of ranked scans for selection, consider the last 4 hour of scans for sky coverage calculations, minimum min between scans on the same source. The characteristics of the generated schedule are listed below. These will vary slightly for each schedule that is generated. Schedule characteristics: Average scan length 236 seconds Median SNR 30 at X-band 20 at S-band Number of observations 3075 observations Average scans per station 240 scans FREQUENCY SEQUENCE ================== Chann# Band Skyfreq(MHz) LOfreq(MHz) 1 x 8204.99 7680.0 2 x 8214.99 7680.0 3 x 8244.99 7680.0 4 x 8304.99 7680.0 5 x 8414.99 7680.0 6 x 8494.99 7680.0 7 x 8544.99 7680.0 8 x 8564.99 7680.0 9 s 2229.99 1600.0 10 s 2234.99 1600.0 11 s 2249.99 1600.0 12 s 2279.99 1600.0 13 s 2309.99 1600.0 14 s 2319.99 1600.0 15 s 2334.99 1600.0 16 s 2344.99 1600.0 APPENDIX ======== SKED Summary from file /home/sked/skd_files/jd0709.skd for experiment JD0709 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 19.5 Min = .0 Max = 37.9 (Baseline S3-Vs on 1908-201) RMS = 11.3 Total time: 1438 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc S3 Vm Vs Avg % obs. time: 31 73 73 29 65 61 55 % cal. time: 2 2 2 2 2 2 2 % slew time: 12 7 8 21 12 11 12 % idle time: 53 15 15 45 18 23 28 total # scans: 250 237 239 223 240 224 235 # scans/hour : 10 9 9 9 10 9 9.8 Avg scan (sec): 107 269 266 114 236 237 204 Total GBytes: 481 1147 1148 460 1020 957 869 Total GB(M5): 428 1020 1020 409 906 850 773 # of tapes : 1.0 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 6.0 Total GBytes (M5) recorded: 4636.3 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm Vs StnTotal -------------------------------------- Ts|250 208 221 213 225 197 1064 Ai| 237 211 190 209 215 1033 Cc| 239 201 208 206 1047 S3| 223 203 179 986 Vm| 240 189 1034 Vs| 224 986 Number of 2-station scans: 40 Number of 3-station scans: 33 Number of 4-station scans: 21 Number of 5-station scans: 26 Number of 6-station scans: 170 Total # of scans, observations: 290 3075