JADE-0710 (Japanese Dynamic Earth observation by VLBI) 2007 OCT 18-19 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0710 Start 2007-291 02:00:00 OCT 18 End 2007-292 01:50:29 OCT 19 Stations 1 Ts T TSUKUB32 2 Ai A AIRA 3 Cc C CHICHI10 4 S3 J SINTOTU3 5 Vm M VERAMZSW 6 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 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 Vs VERA Ishigakijima 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 30 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 Vm Ts Ai Cc S3 Vm 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 Vs 18 18 18 0 18 Vs 16 16 16 0 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 50% 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 213 seconds Median SNR 25 at X-band 20 at S-band Number of observations 3516 observations Average scans per station 255 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/jd0710.skd for experiment JD0710 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 19.4 Min = .0 Max = 36.6 (Baseline Ts-Vm on 1921-293) RMS = 11.6 Total time: 1435 minutes ( 23.9 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Vm=VERAMZSW Vs=VERAISGK Ts Ai Cc S3 Vm Vs Avg % obs. time: 27 72 74 26 63 62 54 % cal. time: 3 3 2 2 2 2 2 % slew time: 11 6 6 19 10 10 10 % idle time: 57 17 15 51 23 24 31 total # scans: 273 271 255 242 255 237 255 # scans/hour : 11 11 10 10 10 9 10.6 Avg scan (sec): 87 230 251 94 213 225 183 Total GBytes: 430 1122 1154 412 978 963 844 Total GB(M5): 383 997 1026 366 869 856 750 # of tapes : 1.0 1.0 1.0 1.0 1.0 1.0 tape change times (hhmm): Total number of tapes: 6.0 Total GBytes (M5) recorded: 4499.6 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm Vs StnTotal -------------------------------------- Ts|273 258 248 240 253 224 1223 Ai| 271 248 233 239 237 1215 Cc| 255 221 240 227 1184 S3| 242 227 201 1122 Vm| 255 220 1179 Vs| 237 1109 Number of 2-station scans: 13 Number of 3-station scans: 28 Number of 4-station scans: 9 Number of 5-station scans: 41 Number of 6-station scans: 197 Total # of scans, observations: 288 3516