JADE-0406 (Japanese Dynamic Earth observation by VLBI) 2004 JUN 10-11 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0406 Start 2004-162 02:00:00 JUN 10 End 2004-163 01:58:00 JUN 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 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 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 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 353 seconds Median SNR 20 at X-band 20 at S-band Number of observations 832 observations Average scans per station 152 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/jd0406.skd for experiment JD0406 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 2.5 Min = .0 Max = 17.8 (Baseline Ts-Ai on 1741-038) RMS = 4.1 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 56 69 80 42 62 % cal. time: 1 1 1 1 1 % slew time: 7 4 4 13 7 % idle time: 33 24 13 42 28 total # scans: 169 142 156 142 152 # scans/hour : 7 5 6 5 6.3 Avg scan (sec): 290 421 444 258 353 Total GBytes: 882 1078 1248 661 967 # of tapes : 9.0 11.0 13.0 7.0 tape change times (hhmm): 0457 0427 0421 0650 0731 0713 0607 1050 1001 1009 0825 1348 1251 1225 1009 1746 1555 1430 1207 2058 1905 1635 1412 0047 2216 1847 1611 0000 0109 2104 1814 0000 0000 2321 2006 0000 0000 0130 2216 0000 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|169 142 155 141 438 Ai| 142 129 135 406 Cc| 156 130 414 S3| 142 406 Number of 2-station scans: 25 Number of 3-station scans: 21 Number of 4-station scans: 124 Total # of scans, observations: 170 832