JADE-0403 (Japanese Dynamic Earth observation by VLBI) 2004 March 02-03 Notes prepared by kwada@gsi.go.jp Geographical Survey Institute, Japan Session JD0403 Start 2004-062 02:00:00 March 02 End 2004-063 02:00:40 March 03 Stations 3 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C 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: Suspended during winter season (from Dec. to Apr.) 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 Ts Ai Ai 19 Ai 19 Cc 19 15 Cc 19 15 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 20 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 30 at X-band 30 at S-band Number of observations 715 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/jd0403.skd for experiment JD0402 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.4 Min = .0 Max = 26.5 (Baseline Ts-Ai on 1741-038) RMS = 5.5 Total time: 1442 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Ts Ai Cc Avg % obs. time: 39 87 87 71 % cal. time: 2 2 2 2 % slew time: 9 5 5 6 % idle time: 48 3 3 18 total # scans: 238 239 239 238 # scans/hour : 9 9 9 9.9 Avg scan (sec): 144 318 318 260 Total GBytes: 618 1369 1369 1118 # of tapes : 7.0 14.0 14.0 tape change times (hhmm): 0619 0351 0351 1007 0535 0535 1340 0725 0725 1717 0908 0908 2115 1056 1056 0121 1234 1234 0000 1414 1414 0000 1604 1604 0000 1753 1753 0000 1941 1941 NOTE: This schedules uses 13 tapes. Tapechanges times are listed for the first 10 tapes. # OF OBSERVATIONS BY BASELINE | Ts Ai Cc StnTotal -------------------------- Ts|238 238 238 476 Ai| 239 239 477 Cc| 239 477 Number of 2-station scans: 1 Number of 3-station scans: 238 Total # of scans, observations: 239 715