JADE-0612 (Japanese Dynamic Earth observation by VLBI) 2006 12 14-15 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0612 Start 2006-348 02:00:00 12 14 End 2006-349 01:45:50 12 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 2006 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 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 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 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 285 seconds Median SNR 35 at X-band 25 at S-band Number of observations 2210 observations Average scans per station 227 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/jd0612.skd for experiment JD0612 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 14.4 Min = .0 Max = 30.0 (Baseline Ai-Cc on 1749+096) RMS = 9.1 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: 80 79 76 80 75 78 % cal. time: 2 2 2 2 2 2 % slew time: 11 7 6 10 10 9 % idle time: 5 10 14 6 11 9 total # scans: 242 238 226 239 227 234 # scans/hour : 10 9 9 9 9 9.8 Avg scan (sec): 288 287 291 289 285 288 Total GBytes: 1256 1230 1184 1245 1168 1217 Total GB(M5): 1116 1093 1053 1106 1038 1082 # 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: 5408.4 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vm Vs StnTotal ---------------------------------- Ts|242 226 222 238 214 900 Ai| 238 219 224 226 895 Cc| 226 218 211 870 Vm| 239 212 892 Vs| 227 863 Number of 2-station scans: 20 Number of 3-station scans: 12 Number of 4-station scans: 19 Number of 5-station scans: 204 Total # of scans, observations: 255 2210