JADE-0604 (Japanese Dynamic Earth observation by VLBI) 2006 Apr 25-26 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0604 Start 2006-115 02:00:00 Apr 25 End 2006-116 01:54:43 Apr 26 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 kokado@gsi.go.jp using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 0 sec Minimum scan length 100 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 333 seconds Median SNR 5 at X-band 5 at S-band Number of observations 1240 observations Average scans per station 215 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/jd0604.skd for experiment JD0604 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 13.7 Min = .0 Max = 28.4 (Baseline Ts-Ai on 1334-127) RMS = 8.7 Total time: 1438 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Vs=VERAISGK Ts Ai Cc Vs Avg % obs. time: 84 84 82 83 83 % cal. time: 2 2 2 2 2 % slew time: 9 6 6 9 7 % idle time: 3 6 8 5 6 total # scans: 217 219 215 212 215 # scans/hour : 9 9 8 8 9.0 Avg scan (sec): 335 331 330 337 333 Total GBytes: 1309 1308 1277 1289 1296 Total GB(M5): 1163 1162 1135 1146 1152 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 4608.4 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc Vs StnTotal ------------------------------ Ts|217 211 210 202 623 Ai| 219 207 209 627 Cc| 215 201 618 Vs| 212 612 Number of 2-station scans: 13 Number of 3-station scans: 19 Number of 4-station scans: 195 Total # of scans, observations: 227 1240