JADE-0901 (Japanese Dynamic Earth observation by VLBI) 2009 JAN 16-17 Notes prepared by skuri@gsi.go.jp Geographical Survey Institute, Japan Session JD0901 Start 2009-016 02:00:00 JAN 16 End 2009-017 01:57:00 JAN 17 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 2009 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 skuri@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 600 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 0 of ranked scans for selection, consider the last 0 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 280 seconds Median SNR 35 at X-band 20 at S-band Number of observations 1929 observations Average scans per station 191 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 2232.99 1600.0 10 s 2240.99 1600.0 11 s 2256.99 1600.0 12 s 2312.99 1600.0 13 s 2344.99 1600.0 14 s 2352.99 1600.0 APPENDIX ======== SKED Summary from file /home/sked/skd_files/jd0901.skd for experiment JD0901 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 3.8 Min = 0.0 Max = 33.9 (Baseline Ai-Vs on 0727-115) RMS = 6.8 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: 21 79 68 64 62 59 % cal. time: 0 0 0 0 0 0 % slew time: 13 8 6 11 10 10 % idle time: 64 12 25 24 27 31 total # scans: 269 248 198 213 191 223 # scans/hour : 11 10 8 9 8 9 Avg scan (sec): 69 273 298 260 280 235 # data tracks: 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 Total GBytes: 333 1219 1062 997 962 915 Total GB(M5): 296 1084 944 886 855 813 # 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: 4065.1 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ----------------------------------- Ts| 238 191 213 182 824 Ai| 190 186 190 804 Cc| 182 181 744 Vm| 176 757 Vs| 729 Number of 2-station scans: 81 Number of 3-station scans: 10 Number of 4-station scans: 18 Number of 5-station scans: 171 Total # of scans, observations: 280 1929