JADE-0512 (Japanese Dynamic Earth observation by VLBI) 2005 DEC 13-14 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0512 Start 2005-347 02:00:00 DEC 13 End 2005-348 01:54:06 DEC 14 Stations 3 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C 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 2005 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 Ts Ai Ai 18 Ai 16 Cc 18 16 Cc 16 15 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 338 seconds Median SNR 80 at X-band 70 at S-band Number of observations 638 observations Average scans per station 218 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 2239.99 1600.0 10 s 2244.99 1600.0 11 s 2259.99 1600.0 12 s 2289.99 1600.0 13 s 2319.99 1600.0 14 s 2329.99 1600.0 15 s 2344.99 1600.0 16 s 2354.99 1600.0 APPENDIX ======== SKED Summary from file /home/sked/skd_files/jd0512.skd for experiment JD0512 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 14.1 Min = .0 Max = 30.4 (Baseline Ai-Cc on 1334-127) RMS = 8.8 Total time: 1438 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Ts Ai Cc Avg % obs. time: 86 85 85 85 % cal. time: 2 2 2 2 % slew time: 9 6 6 7 % idle time: 1 6 4 4 total # scans: 219 217 219 218 # scans/hour : 9 9 9 9.1 Avg scan (sec): 339 337 338 338 Total GBytes: 1340 1320 1334 1332 Total GB(M5): 1191 1173 1186 1184 # of tapes : 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 3.0 Total GBytes (M5) recorded: 3551.3 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc StnTotal -------------------------- Ts|219 212 214 426 Ai| 217 212 424 Cc| 219 426 Number of 2-station scans: 17 Number of 3-station scans: 207 Total # of scans, observations: 224 638