JADE-0609 (Japanese Dynamic Earth observation by VLBI) 2006 Sep. 14-15 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0609 Start 2006-257 02:00:00 Sep. 14 End 2006-258 01:52:18 Sep. 15 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 213 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1326 observations Average scans per station 235 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/jd0609.skd for experiment JD0609 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 14.6 Min = .0 Max = 32.9 (Baseline Ai-S3 on 1741-038) RMS = 10.2 Total time: 1434 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 38 78 78 37 58 % cal. time: 2 2 2 2 2 % slew time: 11 7 7 20 11 % idle time: 46 12 12 39 27 total # scans: 253 231 231 228 235 # scans/hour : 10 9 9 9 9.8 Avg scan (sec): 131 290 290 141 213 Total GBytes: 600 1208 1208 581 900 Total GB(M5): 533 1074 1074 517 800 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 3199.6 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|253 230 230 228 688 Ai| 231 218 212 660 Cc| 231 208 656 S3| 228 648 Number of 2-station scans: 21 Number of 3-station scans: 31 Number of 4-station scans: 202 Total # of scans, observations: 254 1326