JADE-0802 (Japanese Dynamic Earth observation by VLBI) 2008 FEB 14-15 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0802 Start 2008-045 02:00:00 FEB 14 End 2008-046 01:57:46 FEB 15 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 Vm M VERAMZSW 5 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 Vm VERA Mizusawa Vs VERA Ishigakijima SCHEDULE ======== This schedule was made by kokado@gsi.go.jp using sked. Schedule setup parameters: Early start sec Corr. tape sync time ON sec Minimum scan length sec Maximum scan length sec Minimum SNR by baseline for multi-baseline scans X-band (margin 8) S-band (margin 8) Ts Ai Cc Vm Ts Ai Cc Vm Ai 18 Ai 16 Cc 18 16 Cc 16 15 Vm 18 18 18 Vm 16 16 16 Vs 18 18 18 18 Vs 16 16 16 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 60% of ranked scans for selection, consider the last 4 hour of scans for sky coverage calculations, minimum 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 149 seconds Median SNR 40 at X-band 30 at S-band Number of observations 2311 observations Average scans per station 228 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/jd0802.skd for experiment JD0802 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 14.8 Min = .0 Max = 71.1 (Baseline Vm-Vs on 1741-038) RMS = 20.3 Total time: 1438 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc Vm Vs Avg % obs. time: 16 46 47 40 39 38 % cal. time: 0 0 0 0 0 0 % slew time: 9 5 5 8 8 7 % idle time: 74 47 46 51 51 54 total # scans: 239 236 234 237 228 234 # scans/hour : 9 9 9 9 9 9.8 Avg scan (sec): 60 169 176 146 149 140 Total GBytes: 258 719 741 626 615 592 Total GB(M5): 229 639 659 556 547 527 # of tapes : 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 5.0 Total GBytes (M5) recorded: 2632.5 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|239 235 233 237 227 932 Ai| 236 234 233 228 930 Cc| 234 231 228 926 Vm| 237 225 926 Vs| 228 908 Number of 2-station scans: 4 Number of 3-station scans: 3 Number of 4-station scans: 8 Number of 5-station scans: 225 Total # of scans, observations: 240 2311