JADE-0705 (Japanese Dynamic Earth observation by VLBI) 2007 05 24-25 Notes prepared by kokado@gsi.go.jp Geographical Survey Institute, Japan Session JD0705 Start 2007-144 02:00:00 05 24 End 2007-145 01:49:10 05 25 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 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 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 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 269 seconds Median SNR 25 at X-band 20 at S-band Number of observations 2737 observations Average scans per station 200 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/jd0705.skd for experiment JD0705 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 11.7 Min = .0 Max = 28.6 (Baseline Ai-Vm on 1741-038) RMS = 8.1 Total time: 1434 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: 31 78 78 29 62 60 56 % cal. time: 2 2 2 2 2 2 2 % slew time: 9 5 5 16 8 8 9 % idle time: 56 12 13 51 25 29 31 total # scans: 218 217 200 191 200 186 202 # scans/hour : 9 9 8 7 8 7 8.4 Avg scan (sec): 123 311 337 134 269 280 242 Total GBytes: 483 1218 1216 463 971 939 882 Total GB(M5): 430 1082 1080 412 863 835 784 # of tapes : 2.0 1.0 1.0 2.0 2.0 1.0 tape change times (hhmm): 0739 0000 0000 0739 0739 0000 Total number of tapes: 9.0 Total GBytes (M5) recorded: 4704.2 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 Vm Vs StnTotal -------------------------------------- Ts|218 203 194 191 200 172 960 Ai| 217 195 181 185 186 950 Cc| 200 170 187 177 923 S3| 191 177 152 871 Vm| 200 167 916 Vs| 186 854 Number of 2-station scans: 11 Number of 3-station scans: 27 Number of 4-station scans: 10 Number of 5-station scans: 35 Number of 6-station scans: 149 Total # of scans, observations: 232 2737