JADE-0408 (Japanese Dynamic Earth observation by VLBI) 2004 Aug 24-25 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0408 Start 2004-237 02:00:00 Aug 24 End 2004-238 01:55:40 Aug 25 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 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 Chichijima Cc 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 Cc Ts Ai Cc Ai 19 Ai 16 Cc 19 15 Cc 16 13 S3 17 0 0 S3 14 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 316 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1020 observations Average scans per station 176 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/jd0408.skd for experiment JD0408 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.5 Min = .0 Max = 22.7 (Baseline Ai-S3 on 1741-038) RMS = 5.0 Total time: 1447 minutes ( 24.1 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 48 81 80 45 64 % cal. time: 2 2 2 1 2 % slew time: 7 4 4 12 7 % idle time: 41 11 12 39 26 total # scans: 184 176 174 172 176 # scans/hour : 7 7 7 7 7.4 Avg scan (sec): 230 403 403 231 316 Total GBytes: 762 1279 1263 715 1005 Total GB(M5): 677 1136 1122 635 893 # of tapes : 8.0 13.0 13.0 7.0 tape change times (hhmm): 0441 0402 0411 0441 0738 0557 0614 0738 1116 0800 0814 1130 1427 0953 1019 1451 1845 1200 1216 1924 2201 1352 1410 2311 0100 1537 1551 0000 0000 1725 1746 0000 0000 1916 1944 0000 0000 2120 2149 0000 0000 2315 2351 0000 0000 0118 0139 0000 Total number of tapes: 41.0 Total GBytes (M5) recorded: 3572.9 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|184 176 174 172 522 Ai| 176 168 165 509 Cc| 174 165 507 S3| 172 502 Number of 2-station scans: 6 Number of 3-station scans: 18 Number of 4-station scans: 160 Total # of scans, observations: 184 1020