JADE-0806 (Japanese Dynamic Earth observation by VLBI) 2008 JUN 19-20 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0806 Start 2008-171 02:00:00 JUN 19 End 2008-172 01:55:43 JUN 20 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 S3 J SINTOTU3 5 Vm M VERAMZSW 6 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 2008 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 S3 Shintotsukawa Vm VERA Mizusawa Vs VERA Ishigakijima SCHEDULE ======== This schedule was made by kokado@gsi.go.jp using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 0 sec Minimum scan length 30 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 S3 Vm Ts Ai Cc S3 Vm Ai 18 Ai 16 Cc 18 16 Cc 16 15 S3 18 0 0 S3 16 0 0 Vm 18 16 16 0 Vm 16 15 15 0 Vs 18 16 16 0 18 Vs 16 15 15 0 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 XYZ of ranked scans for selection, consider the last 0 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 223 seconds Median SNR 30 at X-band 20 at S-band Number of observations 3685 observations Average scans per station 261 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/jd0806.skd for experiment JD0806 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 17.6 Min = .0 Max = 34.9 (Baseline Ts-S3 on 1921-293) RMS = 10.2 Total time: 1436 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc S3 Vm Vs Avg % obs. time: 37 75 76 36 67 65 59 % cal. time: 0 0 0 0 0 0 0 % slew time: 11 7 6 19 10 10 10 % idle time: 50 17 17 43 22 24 29 total # scans: 287 280 264 263 261 241 266 # scans/hour : 11 11 11 10 10 10 11.1 Avg scan (sec): 113 231 248 120 223 233 194 Total GBytes: 587 1168 1181 571 1049 1012 928 Total GB(M5): 521 1038 1049 508 933 900 825 # of tapes : 1.0 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 6.0 Total GBytes (M5) recorded: 4951.7 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm Vs StnTotal -------------------------------------- Ts|287 269 259 263 260 231 1282 Ai| 280 257 255 245 241 1267 Cc| 264 240 246 233 1235 S3| 263 242 218 1218 Vm| 261 226 1219 Vs| 241 1149 Number of 2-station scans: 13 Number of 3-station scans: 29 Number of 4-station scans: 10 Number of 5-station scans: 33 Number of 6-station scans: 213 Total # of scans, observations: 298 3685