JADE-0704 (Japanese Dynamic Earth observation by VLBI) 2007 04 19-20 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0704 Start 2007-109 02:00:00 04 19 End 2007-110 01:50:29 04 20 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 tbd 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 307 seconds Median SNR 5 at X-band 5 at S-band Number of observations 2032 observations Average scans per station 207 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/jd0704.skd for experiment JD0704 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 12.9 Min = .0 Max = 30.9 (Baseline Ts-Cc on 0454-234) RMS = 10.0 Total time: 1441 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc Vm Vs Avg % obs. time: 79 78 77 76 73 76 % cal. time: 2 2 2 2 2 2 % slew time: 9 6 6 8 9 8 % idle time: 8 13 14 12 15 12 total # scans: 225 225 220 216 207 218 # scans/hour : 9 9 9 8 8 9.1 Avg scan (sec): 303 299 302 306 307 303 Total GBytes: 1229 1214 1199 1190 1143 1196 Total GB(M5): 1093 1079 1065 1058 1016 1063 # 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: 5314.1 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|225 210 213 216 191 830 Ai| 225 210 203 206 829 Cc| 220 204 195 822 Vm| 216 184 807 Vs| 207 776 Number of 2-station scans: 18 Number of 3-station scans: 16 Number of 4-station scans: 26 Number of 5-station scans: 181 Total # of scans, observations: 241 2032