JADE-0410 (Japanese Dynamic Earth observation by VLBI) 2004 10 19-20 Notes prepared by fujisaku@gsi.go.jp Geographical Survey Institute, Japan Session JD0410 Start 2004-293 02:00:00 10 19 End 2004-294 01:57:10 10 20 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 2004 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 fujisaku@gsi.go.jp using sked. Schedule setup parameters: Early start 10 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 7) S-band (margin 7) Ts Ai Cc Ts Ai Cc Ai 19 Ai 16 Cc 19 15 Cc 16 13 S3 17 0 0 S3 14 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 LatLonH of ranked scans for selection, consider the last 0 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 304 seconds Median SNR 25 at X-band 20 at S-band Number of observations 1014 observations Average scans per station 176 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/jd0410.skd for experiment JD0410 (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 = 23.2 (Baseline Ts-Ai on 0537-441) RMS = 5.3 Total time: 1439 minutes ( 24.0 hours). Key: Ts=TSUKUB32 Ai=AIRA Cc=CHICHI10 S3=SINTOTU3 Ts Ai Cc S3 Avg % obs. time: 46 79 80 42 62 % cal. time: 2 2 2 1 2 % slew time: 8 5 5 14 8 % idle time: 42 13 12 41 27 total # scans: 185 177 175 169 176 # scans/hour : 7 7 7 7 7.4 Avg scan (sec): 218 385 399 215 304 Total GBytes: 728 1228 1256 656 968 Total GB(M5): 647 1092 1117 583 860 # of tapes : 8.0 12.0 13.0 7.0 tape change times (hhmm): 0505 0410 0400 0544 0849 0618 0610 0909 1150 0815 0808 1245 1538 1013 1003 1635 1932 1204 1150 2104 2227 1409 1359 0031 0140 1617 1608 0000 0000 1811 1811 0000 0000 1958 1958 0000 0000 2207 2147 0000 0000 0031 2351 0000 0000 0000 0140 0000 Total number of tapes: 40.0 Total GBytes (M5) recorded: 3440.8 # OF OBSERVATIONS BY BASELINE | Ts Ai Cc S3 StnTotal ------------------------------ Ts|185 177 175 169 521 Ai| 177 167 166 510 Cc| 175 160 502 S3| 169 495 Number of 2-station scans: 6 Number of 3-station scans: 22 Number of 4-station scans: 157 Total # of scans, observations: 185 1014