JADE-0707 (Japanese Dynamic Earth observation by VLBI) 2007 July 19-20 Notes prepared by machida@gsi.go.jp Geographical Survey Institute, Japan Session JD0707 Start 2007-200 02:00:00 July 19 End 2007-201 01:45:12 July 20 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 S3 J SINTOTU3 5 Vm M VERAMZSW 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 2007 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 S3 Shintotsukawa Vm VERA Mizusawa SCHEDULE ======== This schedule was made by machida@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 S3 Ts Ai Cc S3 Ai 18 Ai 16 Cc 18 16 Cc 16 15 S3 18 0 0 S3 16 0 0 Vm 18 18 18 0 Vm 16 16 16 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 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 177 seconds Median SNR 25 at X-band 20 at S-band Number of observations 2550 observations Average scans per station 277 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/jd0707.skd for experiment JD0707 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 18.3 Min = .0 Max = 37.8 (Baseline Ts-Vm on 1749+096) RMS = 13.9 Total time: 1428 minutes ( 23.8 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vm=VERAMZSW Ts Ai Cc S3 Vm Avg % obs. time: 28 67 69 26 57 50 % cal. time: 3 3 3 2 3 3 % slew time: 13 9 9 24 14 14 % idle time: 54 19 17 45 24 32 total # scans: 290 278 279 248 277 274 # scans/hour : 12 11 11 10 11 11.4 Avg scan (sec): 84 208 214 92 177 155 Total GBytes: 442 1044 1075 412 885 772 Total GB(M5): 393 928 956 366 786 686 # 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: 3431.4 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm StnTotal ---------------------------------- Ts|290 269 270 245 274 1058 Ai| 278 268 236 255 1028 Cc| 279 234 255 1027 S3| 248 244 959 Vm| 277 1028 Number of 2-station scans: 21 Number of 3-station scans: 19 Number of 4-station scans: 37 Number of 5-station scans: 225 Total # of scans, observations: 302 2550