JADE-0803 (Japanese Dynamic Earth observation by VLBI) 2008 MAR 13-14 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0803 Start 2008-073 02:00:00 MAR 13 End 2008-074 01:58:06 MAR 14 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 70% of ranked scans for selection, consider the last 4 hour of scans for sky coverage calculations, minimum 20 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 150 seconds Median SNR 40 at X-band 35 at S-band Number of observations 2219 observations Average scans per station 216 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/jd0803.skd for experiment JD0803 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 11.9 Min = .0 Max = 54.0 (Baseline Ai-Vm on 1921-293) RMS = 15.3 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc Vm Vs Avg % obs. time: 16 45 47 40 37 37 % cal. time: 0 0 0 0 0 0 % slew time: 9 6 6 8 8 7 % idle time: 74 48 46 50 53 54 total # scans: 236 229 231 234 216 229 # scans/hour : 9 9 9 9 9 9.6 Avg scan (sec): 60 171 177 150 150 141 Total GBytes: 254 707 736 633 586 584 Total GB(M5): 226 628 654 562 521 519 # 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: 2594.4 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|236 226 230 233 214 903 Ai| 229 225 224 216 891 Cc| 231 227 212 894 Vm| 234 212 896 Vs| 216 854 Number of 2-station scans: 6 Number of 3-station scans: 7 Number of 4-station scans: 17 Number of 5-station scans: 209 Total # of scans, observations: 239 2219