JADE-0402 (Japanese Dynamic Earth observation by VLBI) 2004 February 04-05 Notes prepared by kwada@gsi.go.jp Geographical Survey Institute, Japan Session JD0402 Start 2004-035 02:00:00 February 04 End 2004-036 02:06:44 February 05 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 in winter from November to April 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/jd0402.skd for experiment JD0402 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.3 Min = .0 Max = 21.1 (Baseline Ts-Ai on 3C273B ) RMS = 5.3 Total time: 1448 minutes ( 24.1 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Ts Ai Cc Avg % obs. time: 40 87 87 71 % cal. time: 2 2 2 2 % slew time: 9 5 5 7 % idle time: 47 4 4 18 total # scans: 238 239 239 238 # scans/hour : 9 9 9 9.9 Avg scan (sec): 146 317 317 260 Total GBytes: 627 1364 1364 1118 # of tapes : 7.0 14.0 14.0 tape change times (hhmm): 0607 0348 0348 0954 0537 0537 1403 0728 0728 1715 0915 0915 2036 1101 1101 0045 1246 1246 0000 1435 1435 0000 1625 1625 0000 1810 1810 0000 1948 1948 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