JADE-0701 (Japanese Dynamic Earth observation by VLBI) 2007 Jan. 11-12 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0701 Start 2007-011 02:00:00 Jan. 11 End 2007-012 01:57:07 Jan. 12 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 287 seconds Median SNR 35 at X-band 30 at S-band Number of observations 2170 observations Average scans per station 214 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/jd0701.skd for experiment JD0701 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 14.8 Min = .0 Max = 32.2 (Baseline Ts-Cc on 0528+134) RMS = 10.7 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 78 75 78 71 76 % cal. time: 2 2 2 2 2 2 % slew time: 10 6 6 10 10 9 % idle time: 7 11 15 8 16 11 total # scans: 239 238 227 237 214 231 # scans/hour : 9 9 9 9 8 9.6 Avg scan (sec): 284 285 286 285 287 285 Total GBytes: 1223 1221 1171 1215 1106 1188 Total GB(M5): 1087 1085 1041 1080 983 1056 # 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: 5278.6 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|239 226 223 236 203 888 Ai| 238 222 224 214 886 Cc| 227 220 202 867 Vm| 237 200 880 Vs| 214 819 Number of 2-station scans: 16 Number of 3-station scans: 12 Number of 4-station scans: 28 Number of 5-station scans: 195 Total # of scans, observations: 251 2170