JADE-0205 (Japanese Dynamic Earth observation by VLBI) 2002 Aug. 06-07 Notes prepared by Shinobu Kurihara Geographical Survey Institute, Japan Nominal Start: 05:00 U.T. on Aug.06 (day 218) Source Start DURATIONS name yyddd-hhmmss Ts Ai Cc S3 4C39.25 02218-050000| 70 70 70 70| Nominal Stop : 05:01 U.T. on Aug.07 (day 219) Source Start DURATIONS name yyddd-hhmmss Ts Ai Cc S3 1300+580 02219-044750| 754 140 140 754| 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 via 6 times sessions a year. NETWORK ======= The standard configuration of the JADE projests consists of four stations. Shintotsukawa cannot participate winter season session. 1 letter 2 letter Station: Code Code # of tapes # of obs Tsukuba T Ts 10 (K4) 175 Aira A Ai 10 (K4) 133 Chichijima C Cc 12 (K4) 160 Shintotsukawa J S3 8 (K4) 136 SCHEDULE ======== This schedule was made by S. Kurihara using sked. Schedule setup parameters: Early start 30 sec Minimum scan length 70 sec Maximum scan length 764 sec Minimum SNR 20 at X-band (margin 10) 17 at S-band (margin 7) 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 339 seconds Median SNR 25.0 at X-band 25.0 at S-band Number of observations 784 observations Average scans per station 151 scans FREQUENCY SEQUENCE ================== Name Code JPK4-16 K4 Recording mode setup for: TSUKUB32 AIRA CHICHI10 SINTOTU3 Mode Tot.Rate Tot.BandW #chan #bits Barrel C 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 2219.99 MHz 10 S 2224.99 MHz 11 S 2239.99 MHz 12 S 2269.99 MHz 13 S 2299.99 MHz 14 S 2309.99 MHz 15 S 2324.99 MHz 16 S 2334.99 MHz APPENDIX ======== Average number of obs. per baseline per source (normalized by up-time) = 2.4 Min = .0 Max = 18.5 (Baseline Ai-Cc on 0454-234) RMS = 3.7 Total time: 1440 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 56 62 70 45 58 % cal. time: 2 1 1 1 1 % slew time: 8 4 5 15 8 % idle time: 32 30 22 38 30 # of tapes : 10.010.012.0 8.0 total # scans: 175 133 160 136 151 # scans/hour : 7 5 6 5 6.3 Avg scan (sec): 281 408 380 288 339 tape change times (hhmm): 0744 0731 0729 0850 1037 1019 0931 1140 1254 1311 1219 1408 1551 1505 1413 1734 1827 1734 1607 2103 2133 2000 1827 0013 2342 2202 2029 0329 0202 0039 2242 0430 0316 0029 0239 0430 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|175 130 156 135 421 Ai| 133 121 118 369 Cc| 160 124 401 S3| 136 377 Number of 2-station scans: 46 Number of 3-station scans: 20 Number of 4-station scans: 113 Total # of scans, observations: 179 784