JADE-0306 (Japanese Dynamic Earth observation by VLBI) 2003 July 16-17 Notes prepared by kwada@gsi.go.jp Geographical Survey Institute, Japan Session JD0306 Start 2003-197 02:00:00 July 16 End 2003-198 02:03:40 July 17 Stations 4 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C S3 SINTOSU3 J 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 2003 fiscal year, JADE session will be carried out once a month. NETWORK ======= The standard configuration of the JADE projests consists of four stations. Station: Code Tsukuba Ts Aira Ai Chichijima Cc Shintotsukawa S3 SCHEDULE ======== This schedule was made by kwada using sked. Schedule setup parameters: Early start 0 sec Corr. tape sync time 30 sec Minimum scan length 100 sec Maximum scan length 784 sec Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 5) Ts Ai Cc Ts Ai Cc Ai 19 Ai 19 Cc 19 15 Cc 19 15 S3 15 0 0 S3 15 0 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 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 288 seconds Median SNR 20 at X-band 20 at S-band Number of observations 1021 observations Average scans per station 187 scans FREQUENCY SEQUENCE ================== Chann# Band Skyfreq(MHz) LOfreq(MHz) 1 x 8209.99 7680.0 2 x 8219.99 7680.0 3 x 8249.99 7680.0 4 x 8309.99 7680.0 5 x 8419.99 7680.0 6 x 8499.99 7680.0 7 x 8549.99 7680.0 8 x 8569.99 7680.0 9 s 2239.99 1600.0 10 s 2244.99 1600.0 11 s 2259.99 1600.0 12 s 2289.99 1600.0 13 s 2319.99 1600.0 14 s 2329.99 1600.0 15 s 2344.99 1600.0 16 s 2354.99 1600.0 APPENDIX ======== SKED Summary from file /corr/users1/schedule/skd_files/jd0306.skd for experiment JD0306 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.1 Min = .0 Max = 20.0 (Baseline Ts-Cc on 1741-038) RMS = 4.4 Total time: 1442 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 54 75 76 43 62 % cal. time: 2 2 2 1 2 % slew time: 9 5 5 15 9 % idle time: 33 16 15 38 26 total # scans: 205 186 189 169 187 # scans/hour : 8 7 7 7 7.8 Avg scan (sec): 231 349 349 223 288 Total GBytes: 852 1171 1187 680 972 # of tapes : 8.0 11.0 12.0 7.0 tape change times (hhmm): 0457 0405 0405 0534 0753 0648 0620 0919 1011 0919 0839 1251 1321 1123 1055 1555 1634 1336 1313 1926 1953 1539 1523 0002 2323 1740 1714 0000 0000 1948 1912 0000 0000 2146 2106 0000 0000 2354 2300 0000 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|205 182 185 169 536 Ai| 186 174 155 511 Cc| 189 156 515 S3| 169 480 Number of 2-station scans: 28 Number of 3-station scans: 31 Number of 4-station scans: 150 Total # of scans, observations: 209 1021