JADE-0309 (Japanese Dynamic Earth observation by VLBI) 2003 October 02-03 Notes prepared by kwada@gsi.go.jp Geographical Survey Institute, Japan Session JD0309 Start 2003-275 02:00:00 October 02 End 2003-276 02:03:20 October 03 Stations 4 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C S3 SINTOSU3 J 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 2003 fiscal year, JADE session will be carried out once a month. NETWORK ======= The standard configuration of the JADE projests consists of four stations. Station: Code Tsukuba Ts Aira Ai Chichijima Cc Shintotsukawa S3 SCHEDULE ======== This schedule was made by kwada@gsi.go.jp using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 30 sec Minimum scan length 100 sec Maximum scan length 784 sec Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 5) Ts Ai Cc Ts Ai Cc Ai 19 Ai 19 Cc 19 15 Cc 19 15 S3 15 0 0 S3 15 0 0 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 30 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 297 seconds Median SNR 20 at X-band 20 at S-band Number of observations 1032 observations Average scans per station 185 scans FREQUENCY SEQUENCE ================== Chann# Band Skyfreq(MHz) LOfreq(MHz) 1 x 8209.99 7680.0 2 x 8219.99 7680.0 3 x 8249.99 7680.0 4 x 8309.99 7680.0 5 x 8419.99 7680.0 6 x 8499.99 7680.0 7 x 8549.99 7680.0 8 x 8569.99 7680.0 9 s 2239.99 1600.0 10 s 2244.99 1600.0 11 s 2259.99 1600.0 12 s 2289.99 1600.0 13 s 2319.99 1600.0 14 s 2329.99 1600.0 15 s 2344.99 1600.0 16 s 2354.99 1600.0 APPENDIX ======== SKED Summary from file /corr/users1/schedule/skd_files/jd0309.skd for experiment JD0309 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.1 Min = .0 Max = 20.0 (Baseline Ts-Ai on 1741-038) RMS = 4.6 Total time: 1445 minutes ( 24.1 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 52 81 81 40 64 % cal. time: 2 2 2 1 2 % slew time: 8 5 5 15 8 % idle time: 36 10 10 42 24 total # scans: 197 190 190 164 185 # scans/hour : 8 7 7 6 7.7 Avg scan (sec): 231 373 373 214 297 Total GBytes: 822 1277 1277 632 1001 # of tapes : 9.0 13.0 13.0 7.0 tape change times (hhmm): 0423 0343 0343 0623 0727 0542 0542 1016 1111 0736 0736 1344 1409 0925 0925 1728 1728 1128 1128 2044 2018 1314 1314 0025 2236 1524 1524 0000 0127 1718 1718 0000 0000 1905 1905 0000 0000 2106 2106 0000 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|197 186 186 164 536 Ai| 190 190 153 529 Cc| 190 153 529 S3| 164 470 Number of 2-station scans: 15 Number of 3-station scans: 33 Number of 4-station scans: 153 Total # of scans, observations: 201 1032