JADE-0807 (Japanese Dynamic Earth observation by VLBI) 2008 JUL 24-25 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0807 Start 2008-206 02:00:00 JUL 24 End 2008-207 01:51:46 JUL 25 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 18 18 0 Vm 16 16 16 0 Vs 18 18 18 0 18 Vs 16 16 16 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 50% 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 244 seconds Median SNR 25 at X-band 20 at S-band Number of observations 3286 observations Average scans per station 250 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/jd0807.skd for experiment JD0807 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 16.9 Min = .0 Max = 36.7 (Baseline Ts-Vm on 0537-441) RMS = 9.8 Total time: 1433 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 78 35 71 69 61 % cal. time: 0 0 0 0 0 0 0 % slew time: 12 7 6 23 11 11 12 % idle time: 50 17 14 40 17 19 26 total # scans: 284 257 244 256 250 231 253 # scans/hour : 11 10 10 10 10 9 10.6 Avg scan (sec): 112 251 276 120 244 257 210 Total GBytes: 573 1161 1214 555 1101 1070 946 Total GB(M5): 509 1032 1079 493 978 951 841 # 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: 5045.7 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm Vs StnTotal -------------------------------------- Ts|284 230 224 250 236 209 1149 Ai| 257 229 218 218 221 1116 Cc| 244 208 220 212 1093 S3| 256 221 189 1086 Vm| 250 201 1096 Vs| 231 1032 Number of 2-station scans: 46 Number of 3-station scans: 39 Number of 4-station scans: 23 Number of 5-station scans: 27 Number of 6-station scans: 181 Total # of scans, observations: 316 3286