JADE-0602 (Japanese Dynamic Earth observation by VLBI) 2006 Feb. 16-17 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0602 Start 2006-047 02:00:00 Feb. 16 End 2006-048 02:00:10 Feb. 17 Stations 4 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C Vs VERAISGK S 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 four stations. Station: Code Tsukuba Ts Aira Ai Chichijima Cc Shintotsukawa S3 SCHEDULE ======== This schedule was made by fujisaku@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 Ts Ai Cc Ai 18 Ai 16 Cc 18 16 Cc 16 15 Vs 18 18 18 Vs 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 341 seconds Median SNR 50 at X-band 40 at S-band Number of observations 1184 observations Average scans per station 209 scans FREQUENCY SEQUENCE ================== Chann# Band Skyfreq(MHz) LOfreq(MHz) 1 x 8209.99 7680.0 2 x 8219.99 7680.0 3 x 8249.99 7680.0 4 x 8309.99 7680.0 5 x 8419.99 7680.0 6 x 8499.99 7680.0 7 x 8549.99 7680.0 8 x 8569.99 7680.0 9 s 2224.99 1600.0 10 s 2229.99 1600.0 11 s 2244.99 1600.0 12 s 2274.99 1600.0 13 s 2304.99 1600.0 14 s 2314.99 1600.0 15 s 2329.99 1600.0 16 s 2339.99 1600.0 APPENDIX ======== SKED Summary from file /home/sked/skd_files/jd0602.skd for experiment JD0602 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 13.1 Min = .0 Max = 29.6 (Baseline Ai-Cc on 3C274 ) RMS = 9.1 Total time: 1441 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vs=VERAISGK Ts Ai Cc Vs Avg % obs. time: 83 84 81 82 83 % cal. time: 2 2 2 2 2 % slew time: 9 6 6 9 7 % idle time: 4 6 9 6 6 total # scans: 212 214 206 207 209 # scans/hour : 8 8 8 8 8.7 Avg scan (sec): 341 342 342 342 341 Total GBytes: 1303 1319 1270 1277 1293 Total GB(M5): 1158 1173 1129 1135 1149 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 4596.0 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vs StnTotal ------------------------------ Ts|212 202 200 194 596 Ai| 214 196 203 601 Cc| 206 189 585 Vs| 207 586 Number of 2-station scans: 23 Number of 3-station scans: 19 Number of 4-station scans: 184 Total # of scans, observations: 226 1184