JADE-0207 (Japanese Dynamic Earth observation by VLBI) 2002 Dec. 10-11 Notes prepared by Shinobu Kurihara Geographical Survey Institute, Japan Session JD0207 Start 2002-344 07:00:00 DEC. 10 End 2002-345 06:56:00 DEC. 11 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. 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 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 Cc Ts Ai Cc Ai 20 Ai 17 Cc 20 17 Cc 17 14 S3 20 0 0 S3 17 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 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 356 seconds Median SNR 25.0 at X-band 20.0 at S-band Number of observations 884 observations Average scans per station 161 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 ======== Average number of obs. per baseline per source (normalized by up-time) = 2.7 Min = .0 Max = 19.6 (Baseline Ts-Ai on 0454-234) RMS = 4.2 Total time: 1438 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 68 68 77 54 66 % cal. time: 2 1 1 1 1 % slew time: 9 5 6 15 9 % idle time: 20 24 14 28 21 total # scans: 180 151 171 145 161 # scans/hour : 7 6 7 6 6.7 Avg scan (sec): 328 388 390 321 356 Total GBytes: 1062 1057 1200 838 1039 # of tapes : 11.0 10.0 12.0 8.0 tape change times (hhmm): 0936 0915 0915 0951 1147 1133 1116 1243 1403 1359 1315 1516 1610 1627 1516 1838 1821 1854 1735 2105 2033 2121 1926 0000 2305 2325 2125 0337 0128 0223 2325 0000 0407 0434 0154 0000 0625 0000 0400 0000 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|180 151 170 144 465 Ai| 151 141 139 431 Cc| 171 139 450 S3| 145 422 Number of 2-station scans: 29 Number of 3-station scans: 19 Number of 4-station scans: 133 Total # of scans, observations: 181 884