JADE-0706 (Japanese Dynamic Earth observation by VLBI) 2007 06 21-22 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0706 Start 2007-172 02:00:00 06 21 End 2007-173 01:55:41 06 22 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 S3 J SINTOTU3 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 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 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 Ts Ai Cc Ai 18 Ai 16 Cc 18 16 Cc 16 15 S3 18 0 0 S3 16 0 0 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 203 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1328 observations Average scans per station 237 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/jd0706.skd for experiment JD0706 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 15.2 Min = .0 Max = 33.6 (Baseline Ts-Cc on 1741-038) RMS = 9.2 Total time: 1436 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 34 78 79 32 56 % cal. time: 2 2 2 2 2 % slew time: 11 6 7 20 11 % idle time: 51 11 10 43 29 total # scans: 251 239 241 218 237 # scans/hour : 10 9 10 9 9.9 Avg scan (sec): 117 284 282 129 203 Total GBytes: 532 1221 1225 506 872 Total GB(M5): 473 1086 1089 450 775 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 3099.2 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|251 233 235 218 686 Ai| 239 231 207 671 Cc| 241 204 670 S3| 218 629 Number of 2-station scans: 23 Number of 3-station scans: 33 Number of 4-station scans: 201 Total # of scans, observations: 257 1328