JADE-0702 (Japanese Dynamic Earth observation by VLBI) 2007 Feb. 08-09 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0702 Start 2007-039 02:00:00 Feb. 08 End 2007-040 01:53:49 Feb. 09 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 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 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 266 seconds Median SNR 40 at X-band 30 at S-band Number of observations 2301 observations Average scans per station 232 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/jd0702.skd for experiment JD0702 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 15.6 Min = .0 Max = 33.6 (Baseline Ts-Vm 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: 76 77 74 75 71 75 % cal. time: 2 2 2 2 2 2 % slew time: 10 6 6 10 10 8 % idle time: 10 12 16 11 15 13 total # scans: 255 255 242 250 232 246 # scans/hour : 10 10 10 10 9 10.3 Avg scan (sec): 259 262 264 259 266 262 Total GBytes: 1189 1206 1153 1165 1113 1166 Total GB(M5): 1057 1072 1025 1036 989 1036 # 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: 5181.3 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|255 239 235 249 217 940 Ai| 255 236 235 231 941 Cc| 242 229 218 918 Vm| 250 212 925 Vs| 232 878 Number of 2-station scans: 20 Number of 3-station scans: 15 Number of 4-station scans: 31 Number of 5-station scans: 205 Total # of scans, observations: 271 2301