JADE-0805 (Japanese Dynamic Earth observation by VLBI) 2008 MAY 15-16 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0805 Start 2008-136 02:00:00 MAY 15 End 2008-137 01:58:20 MAY 16 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 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 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 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 60% 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 173 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1686 observations Average scans per station 292 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/jd0805.skd for experiment JD0805 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 18.5 Min = .0 Max = 36.5 (Baseline Ts-Cc on 2134+00 ) RMS = 9.2 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 37 80 80 37 58 % cal. time: 3 3 3 3 3 % slew time: 11 7 6 19 11 % idle time: 46 9 9 39 26 total # scans: 304 292 291 283 292 # scans/hour : 12 12 12 11 12.2 Avg scan (sec): 107 237 237 113 173 Total GBytes: 589 1246 1245 575 914 Total GB(M5): 523 1107 1107 511 813 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 3250.3 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|304 289 289 282 860 Ai| 292 283 273 845 Cc| 291 270 842 S3| 283 825 Number of 2-station scans: 18 Number of 3-station scans: 22 Number of 4-station scans: 267 Total # of scans, observations: 307 1686