JADE-0908 (Japanese Dynamic Earth observation by VLBI) 2009 August 20-21 Notes prepared by tanimoto@gsi.go.jp Geographical Survey Institute, Japan Session JD0908 Start 2009-232 02:00:00 August 20 End 2009-233 01:54:28 August 21 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 2009 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 tanimoto@gsi.go.jp using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 0 sec Minimum scan length 30 sec Maximum scan length 600 sec Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 5) Ts Ai Cc S3 Ts Ai Cc S3 Ai 20 Ai 16 Cc 20 20 Cc 16 16 S3 20 0 0 S3 16 0 0 Vm 20 20 20 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 0 of ranked scans for selection, consider the last 0 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 233 seconds Median SNR 25 at X-band 20 at S-band Number of observations 2003 observations Average scans per station 218 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 2232.99 1600.0 10 s 2240.99 1600.0 11 s 2256.99 1600.0 12 s 2312.99 1600.0 13 s 2344.99 1600.0 14 s 2352.99 1600.0 APPENDIX ======== SKED Summary from file /home/sked/skd_files/jd0908.skd for experiment JD0908 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 4.8 Min = 0.0 Max = 37.6 (Baseline Ts-Vm on 0537-441) RMS = 7.4 Total time: 1437 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vm=VERAMZSW Ts Ai Cc S3 Vm Avg % obs. time: 48 80 76 42 59 61 % cal. time: 0 0 0 0 0 0 % slew time: 10 9 8 12 13 11 % idle time: 41 10 15 45 27 28 total # scans: 260 235 210 200 218 224 # scans/hour : 11 10 9 8 9 9 Avg scan (sec): 160 294 311 182 233 235 # data tracks: 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 Total GBytes: 748 1243 1176 655 916 948 Total GB(M5): 665 1105 1046 582 814 842 # 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: 4212.0 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm StnTotal ----------------------------------- Ts| 231 206 200 218 855 Ai| 203 190 193 817 Cc| 185 187 781 S3| 190 765 Vm| 788 Number of 2-station scans: 45 Number of 3-station scans: 16 Number of 4-station scans: 30 Number of 5-station scans: 173 Total # of scans, observations: 264 2003