JADE-0308 (Japanese Dynamic Earth observation by VLBI) 2003 September 10-11 Notes prepared by K.Wada Geographical Survey Institute, Japan Session JD0308 Start 2003-253 02:00:00 September 10 End 2003-254 02:08:42 September 11 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 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 SCHEDULE ======== This schedule was made by K.Wada 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 Cc Ts Ai Cc Ai 19 Ai 19 Cc 19 15 Cc 19 15 S3 15 0 0 S3 15 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 290 seconds Median SNR 20 at X-band 20 at S-band Number of observations 1063 observations Average scans per station 190 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/jd0308.skd for experiment JD0308 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.2 Min = .0 Max = 20.0 (Baseline Ts-Ai on 1741-038) RMS = 4.7 Total time: 1440 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 55 80 80 43 64 % cal. time: 2 2 2 1 2 % slew time: 8 5 5 14 8 % idle time: 33 12 12 40 24 total # scans: 200 198 198 166 190 # scans/hour : 8 8 8 6 7.9 Avg scan (sec): 239 349 349 225 290 Total GBytes: 860 1244 1244 672 1005 # of tapes : 9.0 13.0 13.0 7.0 tape change times (hhmm): 0434 0407 0407 0546 0713 0607 0607 0936 1012 0813 0813 1254 1320 1002 1002 1622 1643 1148 1148 2009 1937 1343 1343 2339 2213 1533 1533 0000 0040 1728 1728 0000 0000 1937 1937 0000 0000 2123 2123 0000 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|200 192 192 165 549 Ai| 198 198 158 548 Cc| 198 158 548 S3| 166 481 Number of 2-station scans: 13 Number of 3-station scans: 36 Number of 4-station scans: 157 Total # of scans, observations: 206 1063