JADE-0301 (Japanese Dynamic Earth observation by VLBI) 2003 Jan. 27-28 Notes prepared by Shinobu Kurihara Geographical Survey Institute, Japan Session JD0301 Start 2003-027 02:00:00 JAN. 27 End 2003-028 01:57:10 JAN. 28 Stations 3 Ts TSUKUB32 T Ai AIRA A Cc CHICHI10 C 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. NETWORK ======= The standard configuration of the JADE projests consists of four stations. Station: Code Tsukuba Ts Aira Ai Chichijima Cc SCHEDULE ======== This schedule was made by S. Kurihara 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 10) S-band (margin 7) Ts Ai Ts Ai Ai 20 Ai 15 Cc 20 17 Cc 15 14 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 20% 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 290 seconds Median SNR 35.0 at X-band 35.0 at S-band Number of observations 560 observations Average scans per station 199 scans FREQUENCY SEQUENCE ================== Name Code K4-16SX K4 Recording mode setup for: TSUKUB32 AIRA CHICHI10 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/jd0301.skd for experiment JD0301 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 3.4 Min = .0 Max = 17.5 (Baseline Ts-Ai on CTA26 ) RMS = 4.7 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 Ts Ai Cc Avg % obs. time: 42 77 78 66 % cal. time: 2 2 2 2 % slew time: 11 7 7 8 % idle time: 43 13 11 22 total # scans: 212 192 194 199 # scans/hour : 8 8 8 8.3 Avg scan (sec): 175 346 350 290 Total GBytes: 667 1198 1225 1030 # of tapes : 7.0 12.0 12.0 tape change times (hhmm): 0641 0429 0408 1031 0645 0607 1342 0849 0819 1715 1103 1024 2019 1305 1238 0051 1525 1439 1727 1647 1945 1850 2150 2051 2350 2305 0150 0113 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc StnTotal -------------------------- Ts|212 192 194 386 Ai| 192 174 366 Cc| 194 368 Number of 2-station scans: 38 Number of 3-station scans: 174 Total # of scans, observations: 212 560