JADE-0311 (Japanese Dynamic Earth observation by VLBI) 2003 December 16-17 Notes prepared by kwada@gsi.go.jp Geographical Survey Institute, Japan Session JD0311 Start 2003-350 02:00:00 December 16 End 2003-351 02:04:30 December 17 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 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 (suspended in winter from December 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 7) Ts Ai Ts Ai Ai 15 Ai 12 Cc 15 15 Cc 12 12 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 25 at X-band 25 at S-band Number of observations 820 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/jd0311.skd for experiment JD0311 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 4.9 Min = .0 Max = 28.8 (Baseline Ts-Ai on 1741-038) RMS = 5.5 Total time: 1454 minutes ( 24.2 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Ts Ai Cc Avg % obs. time: 43 85 84 71 % cal. time: 3 3 3 3 % slew time: 9 6 5 7 % idle time: 43 5 6 18 total # scans: 274 274 273 273 # scans/hour : 11 11 11 11.4 Avg scan (sec): 138 271 270 226 Total GBytes: 685 1341 1331 1119 # of tapes : 7.0 14.0 14.0 tape change times (hhmm): 0544 0350 0350 0925 0544 0544 1230 0733 0733 1609 0925 0925 1902 1116 1116 2213 1304 1304 0000 1451 1451 0000 1640 1640 0000 1828 1828 0000 2019 2019 NOTE: This schedules uses 13 tapes. Tapechanges times are listed for the first 10 tapes. # OF OBSERVATIONS BY BASELINE | Ts Ai Cc StnTotal -------------------------- Ts|274 274 273 547 Ai| 274 273 547 Cc| 273 546 Number of 2-station scans: 1 Number of 3-station scans: 273 Total # of scans, observations: 274 820