JADE-0607 (Japanese Dynamic Earth observation by VLBI) 2006 Jul. 20-21 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0607 Start 2006-201 02:00:00 Jul. 20 End 2006-202 01:54:09 Jul. 21 Stations 4 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C S3 SINTOSU3 J 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 S3 18 0 0 S3 16 0 0 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 257 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1141 observations Average scans per station 203 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/jd0607.skd for experiment JD0607 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 12.6 Min = 1.4 Max = 31.9 (Baseline Ts-S3 on 1334-127) RMS = 7.8 Total time: 1434 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 42 79 79 40 60 % cal. time: 2 2 2 2 2 % slew time: 9 5 5 16 9 % idle time: 45 12 12 40 27 total # scans: 218 202 198 194 203 # scans/hour : 9 8 8 8 8.5 Avg scan (sec): 166 338 345 181 257 Total GBytes: 654 1232 1231 632 938 Total GB(M5): 581 1095 1094 561 833 # of tapes : 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 4.0 Total GBytes (M5) recorded: 3333.7 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|218 201 197 194 592 Ai| 202 189 182 572 Cc| 198 178 564 S3| 194 554 Number of 2-station scans: 19 Number of 3-station scans: 26 Number of 4-station scans: 174 Total # of scans, observations: 219 1141