JADE-0712 (Japanese Dynamic Earth observation by VLBI) 2007 Dec 13-14 Notes prepared by machida@gsi.go.jp Geographical Survey Institute, Japan Session JD0712 Start 2007-347 02:00:00 Dec 13 End 2007-348 01:58:10 Dec 14 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 machida@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 400 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 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 271 seconds Median SNR 25 at X-band 20 at S-band Number of observations 2185 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/jd0712.skd for experiment JD0712 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 8.5 Min = .0 Max = 29.3 (Baseline Ts-Vm on 0454-234) RMS = 7.9 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc Vm Vs Avg % obs. time: 13 74 75 73 69 61 % cal. time: 2 2 2 2 2 2 % slew time: 11 7 6 11 9 9 % idle time: 71 15 15 12 17 26 total # scans: 251 231 227 240 222 234 # scans/hour : 10 9 9 10 9 9.8 Avg scan (sec): 47 279 286 265 271 229 Total GBytes: 216 1161 1171 1145 1086 956 Total GB(M5): 192 1032 1041 1018 965 850 # 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: 4250.2 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|251 224 225 240 215 904 Ai| 231 221 216 214 875 Cc| 227 216 208 870 Vm| 240 206 878 Vs| 222 843 Number of 2-station scans: 23 Number of 3-station scans: 12 Number of 4-station scans: 26 Number of 5-station scans: 197 Total # of scans, observations: 258 2185