JADE-0407 (Japanese Dynamic Earth observation by VLBI) 2004 Jul 13-14 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0407 Start 2004-195 02:00:00 Jul 13 End 2004-196 01:58:00 Jul 14 Stations 3 Ts TSUKUB32 T Ai AIRA A 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 2004 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 Shintotsukawa S3 SCHEDULE ======== This schedule was made by fujisaku@gsi.go.jp using sked. Schedule setup parameters: Early start 10 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 7) S-band (margin 7) Ts Ai Ts Ai Ai 19 Ai 17 S3 17 0 S3 14 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 seconds Median SNR 20 at X-band 20 at S-band Number of observations 687 observations Average scans per station 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/jd0407.skd for experiment JD0407 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.6 Min = .0 Max = 25.3 (Baseline Ts-Ai on 1749+096) RMS = 6.6 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA S3=SINTOTU3 Ts Ai S3 Avg % obs. time: 77 32 75 61 % cal. time: 2 2 2 2 % slew time: 9 5 15 10 % idle time: 10 59 5 25 total # scans: 237 236 226 233 # scans/hour : 9 9 9 9.7 Avg scan (sec): 281 117 289 229 Total GBytes: 1199 499 1177 959 Total GB(M5): 1065 444 1046 852 # of tapes : 12.0 5.0 12.0 tape change times (hhmm): 0404 0656 0404 0609 1154 0609 0811 1629 0811 1019 2113 1019 1224 0000 1224 1427 0000 1430 1633 0000 1648 1833 0000 1853 2042 0000 2056 2243 0000 2256 NOTE: This schedules uses 11 tapes. Tapechanges times are listed for the first 10 tapes. Total number of tapes: 29.0 Total GBytes (M5) recorded: 2556.6 # OF OBSERVATIONS BY BASELINE | Ts Ai S3 StnTotal -------------------------- Ts|237 236 226 462 Ai| 236 225 461 S3| 226 451 Number of 2-station scans: 12 Number of 3-station scans: 225 Total # of scans, observations: 237 687