JADE-0608 (Japanese Dynamic Earth observation by VLBI) 2006 Aug. 17-18 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0608 Start 2006-229 02:00:00 Aug. 17 End 2006-230 01:54:24 Aug. 18 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 2006 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 0 sec Minimum scan length 40 sec Maximum scan length 784 sec Minimum SNR by baseline for multi-baseline scans X-band (margin 8) S-band (margin 8) Ts Ai Cc Ts Ai Cc Ai 18 Ai 16 Cc 18 16 Cc 16 15 S3 18 0 0 S3 16 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 222 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1289 observations Average scans per station 227 scans FREQUENCY SEQUENCE ================== Chann# Band Skyfreq(MHz) LOfreq(MHz) 1 x 8204.99 7680.0 2 x 8214.99 7680.0 3 x 8244.99 7680.0 4 x 8304.99 7680.0 5 x 8414.99 7680.0 6 x 8494.99 7680.0 7 x 8544.99 7680.0 8 x 8564.99 7680.0 9 s 2229.99 1600.0 10 s 2234.99 1600.0 11 s 2249.99 1600.0 12 s 2279.99 1600.0 13 s 2309.99 1600.0 14 s 2319.99 1600.0 15 s 2334.99 1600.0 16 s 2344.99 1600.0 APPENDIX ======== SKED Summary from file /home/sked/skd_files/jd0608.skd for experiment JD0608 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 14.1 Min = .0 Max = 33.6 (Baseline Ts-Cc on 1741-038) RMS = 10.7 Total time: 1435 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 38 79 79 37 58 % cal. time: 2 2 2 2 2 % slew time: 11 7 7 19 11 % idle time: 47 10 10 40 27 total # scans: 243 227 225 215 227 # scans/hour : 10 9 9 8 9.5 Avg scan (sec): 136 302 304 148 222 Total GBytes: 594 1235 1233 574 910 Total GB(M5): 528 1098 1096 510 809 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 3234.0 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|243 227 225 215 667 Ai| 227 217 206 650 Cc| 225 199 641 S3| 215 620 Number of 2-station scans: 17 Number of 3-station scans: 28 Number of 4-station scans: 198 Total # of scans, observations: 243 1289