JADE-0304 (Japanese Dynamic Earth observation by VLBI) 2003 May 21-22 Notes prepared by Kozin Wada Geographical Survey Institute, Japan Session JD0304 Start 2003-141 02:00:00 MAY 21 End 2003-142 02:04:00 MAY 22 Stations 4 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C S3 SINTOTU3 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 K. Wada 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 269 seconds Median SNR 25.0 at X-band 20.0 at S-band Number of observations 1051 observations Average scans per station 222 scans FREQUENCY SEQUENCE ================== Name Code K4-16SX K4 Recording mode setup for: TSUKUB32 AIRA CHICHI10 SINTOTU3 Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk34K4 128.000 Mbits 64.000 MHz 16 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 0(*0) 0 211.90 mm/s X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 115.0 MHz rms spanned bw= 42.8 MHz Effective number of channels recorded per sub-pass X S Total 8.000 8.000 16.000 1 X 8209.99 MHz 2 X 8219.99 MHz 3 X 8249.99 MHz 4 X 8309.99 MHz 5 X 8419.99 MHz 6 X 8499.99 MHz 7 X 8549.99 MHz 8 X 8569.99 MHz 9 S 2239.99 MHz 10 S 2244.99 MHz 11 S 2259.99 MHz 12 S 2289.99 MHz 13 S 2319.99 MHz 14 S 2329.99 MHz 15 S 2344.99 MHz 16 S 2354.99 MHz APPENDIX ======== SKED Summary from file /corr/users1/schedule/skd_files/jd0304.skd for experiment JD0304 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.2 Min = .0 Max = 25.0 (Baseline Ts-Cc on 0454-234) RMS = 5.2 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 54 73 77 40 61 % cal. time: 2 2 2 2 2 % slew time: 9 6 6 17 10 % idle time: 33 18 13 40 26 total # scans: 217 189 202 175 195 # scans/hour : 9 7 8 7 8.2 Avg scan (sec): 215 334 329 200 269 Total GBytes: 840 1138 1197 630 951 # of tapes : 8.0 11.0 12.0 6.0 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|217 184 198 174 556 Ai| 189 175 156 515 Cc| 202 164 537 S3| 175 494 Number of 2-station scans: 34 Number of 3-station scans: 37 Number of 4-station scans: 151 Total # of scans, observations: 222 1051