JADE-0703 (Japanese Dynamic Earth observation by VLBI) 2007 Mar. 15-16 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0703 Start 2007-074 02:00:00 Mar. 15 End 2007-075 01:56:25 Mar. 16 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 Vm M VERAMZSW 5 Vs S VERAISGK 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 2007 fiscal year, JADE session will be carried out once a month. NETWORK ======= The standard configuration of the JADE projests consists of some stations. Code : Station Ts Tsukuba Ai Aira Cc Chichijima Vm VERA Mizusawa Vs VERA Ishigakijima SCHEDULE ======== This schedule was made by fujisaku@gsi.go.jp using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 20 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 Vm Ts Ai Cc Vm Ai 18 Ai 16 Cc 18 16 Cc 16 15 Vm 18 18 18 Vm 16 16 16 Vs 18 18 18 18 Vs 16 16 16 16 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 279 seconds Median SNR 35 at X-band 30 at S-band Number of observations 2210 observations Average scans per station 222 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/jd0703.skd for experiment JD0703 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 15.2 Min = .0 Max = 35.7 (Baseline Vm-Vs on 1741-038) RMS = 10.1 Total time: 1438 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc Vm Vs Avg % obs. time: 78 77 76 77 71 76 % cal. time: 2 2 2 2 2 2 % slew time: 10 6 6 9 10 8 % idle time: 8 12 14 10 15 12 total # scans: 244 240 235 238 222 235 # scans/hour : 10 10 9 9 9 9.8 Avg scan (sec): 277 279 280 279 279 278 Total GBytes: 1220 1209 1185 1197 1116 1186 Total GB(M5): 1084 1075 1053 1064 992 1054 # of tapes : 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 5.0 Total GBytes (M5) recorded: 5270.1 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|244 228 228 237 209 902 Ai| 240 226 224 221 899 Cc| 235 221 211 886 Vm| 238 205 887 Vs| 222 846 Number of 2-station scans: 16 Number of 3-station scans: 16 Number of 4-station scans: 26 Number of 5-station scans: 199 Total # of scans, observations: 257 2210