JADE-0708 (Japanese Dynamic Earth observation by VLBI) 2007 AUG 23-24 Notes prepared by tbd Geographical Survey Institute, Japan Session JD0708 Start 2007-235 02:00:00 AUG 23 End 2007-236 01:53:56 AUG 24 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 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 S3 Shintotsukawa Vm VERA Mizusawa Vs VERA Ishigakijima SCHEDULE ======== This schedule was made by tbd 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 235 seconds Median SNR 25 at X-band 20 at S-band Number of observations 3291 observations Average scans per station 240 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/jd0708.skd for experiment JD0708 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 15.0 Min = .0 Max = 35.9 (Baseline Vm-Vs on 1921-293) RMS = 10.6 Total time: 1437 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc S3 Vm Vs Avg % obs. time: 30 73 76 29 65 62 56 % cal. time: 2 2 2 2 2 2 2 % slew time: 10 6 6 19 10 9 10 % idle time: 56 17 14 48 21 25 30 total # scans: 258 247 236 232 240 217 238 # scans/hour : 10 10 9 9 10 9 9.9 Avg scan (sec): 100 256 279 108 235 248 204 Total GBytes: 467 1139 1186 452 1016 969 872 Total GB(M5): 415 1012 1054 401 903 861 775 # 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: 4650.4 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm Vs StnTotal -------------------------------------- Ts|258 239 231 231 238 209 1148 Ai| 247 229 221 220 217 1126 Cc| 236 210 222 212 1104 S3| 232 216 192 1070 Vm| 240 204 1100 Vs| 217 1034 Number of 2-station scans: 13 Number of 3-station scans: 24 Number of 4-station scans: 11 Number of 5-station scans: 32 Number of 6-station scans: 188 Total # of scans, observations: 268 3291