JADE-0906 (Japanese Dynamic Earth observation by VLBI) 2009 June 21-22 Notes prepared by tanimoto@gsi.go.jp Geographical Survey Institute, Japan Session JD0906 Start 2009-162 02:00:00 June 21 End 2009-163 01:49:54 June 22 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 S3 J SINTOTU3 5 Vs S VERAISGK 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 Vs VERA Ishigakijima 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 Vs 20 20 20 0 Vs 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 220 seconds Median SNR 25 at X-band 20 at S-band Number of observations 2318 observations Average scans per station 239 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/jd0906.skd for experiment JD0906 (all scans with at least one subnet station) Average number of obs. per baseline per source(normalized by up-time) = 11.6 Min = 0.0 Max = 47.0 (Baseline Cc-Vs on 2201+315) RMS = 10.7 Total time: 1431 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vs=VERAISGK Ts Ai Cc S3 Vs Avg % obs. time: 34 81 80 31 61 58 % cal. time: 2 2 1 1 1 1 % slew time: 9 9 8 12 12 11 % idle time: 54 7 9 54 24 30 total # scans: 266 267 250 228 239 250 # scans/hour : 11 11 10 10 10 10 Avg scan (sec): 111 262 274 117 220 196 # data tracks: 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 Total GBytes: 531 1258 1232 480 947 890 Total GB(M5): 472 1118 1095 427 842 791 # 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: 3954.0 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vs StnTotal ----------------------------------- Ts| 256 243 228 228 955 Ai| 242 224 238 960 Cc| 221 229 935 S3| 209 882 Vs| 904 Number of 2-station scans: 28 Number of 3-station scans: 14 Number of 4-station scans: 28 Number of 5-station scans: 208 Total # of scans, observations: 278 2318