CORE-1004 (Continuous Observations of the Rotation of the Earth-1004) 2000 September 25 Notes prepared by Cynthia Thomas and Nancy Vandenberg,NVI/GSFC Session code: C1004 Schedule file: sep00/c1004.skd on CDDISA Nominal Start: 17:30 U.T. on September 25 (day 269) first observation at 17:30 U.T. on 0955+476 for AP-GC-MA-TS first observation at 17:30 U.T. on 0003-066 for HH-HO Nominal Stop: 17:30 U.T. on September 26 (day 270) last observation at 17:12 U.T. on 0749+540 for MA last observation at 17:15 U.T. on 2255-282 for HH-HO last observation at 17:15 U.T. on 4C39.25 for AP-GC-TS Correlator: Haystack Observing mode: Formatter mode C Frequency sequence CDP-WBCA (720 MHz span at X, 125 MHz span at S) (modified wide-band, shifted to avoid RFI at Matera) Number of frequencies 14 Number of channels 14 (8 X-band, 6 S-band) Channel bandwidth 2.0 MHz Sample rate 4 Mb/s Bits per sample 1 Total data rate 56 Mb/s Data rate on tape 4 Mb/s/track Fan-out none Tape speed 80 ips (high density), 135 ips (low density) Tracks per sub-pass 14 Number of sub-passes 2 (each head position) Passes per tape 12 Barrel roll no Track frame format Mark3 1 letter 2 letter Station Code Code # of tapes # of obs Occupation Code Algonquin G AP 2 (HDT) 260 72828201 Fairbanks A GC 1 (TT) 349 40476601 HartRAO J HH 1 (TT) 188 72326201 Hobart H HO 2 (HDT) 223 72425901 Matera I MA 1 (TT) 204 72435701 Tsukuba T TS 1 (TT) 392 73452301 Purpose ======= The CORE-1 sessions provide 72 hours of continuous data once a month from July to December, 2000. These sessions will help reach CORE's goal of continuous data. The CORE-1 sessions use the same stations that participated in the CORE-A sessions in the first half of 2000. The CORE-A sessions, recorded simultaneously with NEOS since 1997, have provided 85 sessions with the purpose of studying differences in EOP results measured with different networks. This study is still continuing using the data already obtained. Schedule ======== This schedule was made by C. Thomas using sked. Schedule setup parameters: Early start 20 sec Minimum scan length 70 sec Maximum scan length 600 sec Minimum SNR 20 at X-band 15 at S-band 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 50% of ranked scans for selection, consider the last 3 hours of scans for sky coverage calculations, minimum 40 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 121 sec Average SNR 61.9 at X-band, 45.8 at S-band Number of observations (delay measurements) 1335 obs Average number of scans per station 269 scans Flux Information ================ Program snranal compares the measured performance of a session with respect to the predicted. The program calculates an empirical flux density for each source. In order to account for changes in the flux catalog since the last update based on source modeling, the fluxes in the flux catalog for the sources in the current source catalog were adjused using the following databases: Date Session ==== ========= 00FEB22 NEOS-A356 00FEB29 NEOS-A357 00MAR14 NEOS-A359 00MAR21 NEOS-A360 00MAR28 NEOS-A361 00APR04 NEOS-A362 00APR11 NEOS-A363 00APR25 NEOS-A365 00JUN06 NEOS-A371 Procedures ========== Please generate the procedures for this session using drudg. SKED Summary from file ./c1004.skd for experiment C1004 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x x x x x x x x x x x x x x xx xI 17 23 3.6 0048-097I x xx xx x x x x x I 10 32 5.8 0059+581I x x x x x x x x xx x x x x I 14 36 3.6 0104-408Ixx x xx x x x x xx x xx I 14 18 5.4 0119+115I x x x xx x x x xx xx xx x x I 16 26 3.4 0119+041I x x x x x xx x x x x x I 12 27 4.0 0208-512I I 0 0 .0 0229+131I x x x x x I 5 5 .8 0235+164Ix x x xx x xx x xx x x x I 14 44 5.8 CTA26 I x xx x x x xx x x x x xx x x x xI 18 22 3.4 0402-362I x x x xI 4 4 1.2 0454-234Ix x xx xx xx x x x xx xx x x x xI 19 25 4.5 0458-020I x x x x x I 5 9 1.5 0528+134I x x x x x x x xx x xx x I 13 21 2.5 0537-441Ix x xx x x x x x x x xI 12 12 3.5 0552+398Ixx x x x x x x x xx xx x xx x x x xx x x xx I 25 93 10.6 0556+238I x x xx x x x x x x I 10 10 1.0 0637-752I x x x x x x I 6 6 2.4 0727-115I x xx xx x xx x x x x x x xx x I 17 25 4.8 0749+540I xx xx xx x x x x x xx x x x x x x x x x I 22 114 11.5 0804+499I xI 1 3 .3 0805+410I x x x I 3 7 .7 0823+033I xx x x x xx x x x x xx xx xx I 17 19 2.8 OJ287 Ix x x xx x xx x x x x x xx x x I 17 49 6.2 0919-260I I 0 0 .0 0920-397I I 0 0 .0 4C39.25 Ixx x xx x x x x x x x x x x I 15 52 6.7 OK290 I x x x x x xx x x x I 10 10 1.1 0955+476Ix x x xx x x x xx x x I 12 51 5.9 1034-293Ixx x xx x x xx x x x x x I 14 14 2.3 1044+719I x x x x x x x x x x xI 11 37 3.7 1053+815I x x x x x x xI 7 17 1.7 1057-797I x x x I 3 3 1.2 1104-445Ix I 1 1 .3 1124-186I x xx xx xx x x x xxx x x x x x xx xI 21 34 6.3 1128+385I x x x xx x x I 7 15 1.3 1144-379I xx x x xx x x x x x x xI 13 15 4.5 1219+044I I 0 0 .0 1255-316I I 0 0 .0 1300+580Ix x x x x x x x x x x x x I 13 33 3.3 1313-333I I 0 0 .0 1334-127I x x I 2 4 2.0 1351-018I x xx xx x x x x x xx x I 13 13 2.1 1357+769I x x x x x x x I 7 33 3.3 1424-418I x x x x x I 5 5 1.5 1451-375I x x x x I 4 4 1.0 1606+106I x x x x xxx x x x xx x x x x xI 17 37 5.1 1622-253I x xx xx x x x x xx x x x x I 15 15 2.5 NRAO512 I x xx x xx xx x x x x x x x x x xI 18 48 4.7 1726+455I x x x x x x xI 7 18 2.1 1739+522I x x x x x xx x x x x x x x xx I 16 41 4.3 1741-038Ix x x x xx x x x x x x x xx x x x x xI 20 30 4.7 1749+096I xx x x xx x x x xx I 11 35 5.1 1815-553I x x x I 3 3 1.2 1908-201I xx x x x x x xx x xxx x x I 15 15 2.6 1954-388I xx xx x xx x xx I 10 10 2.7 1958-179I x x x x x x x x x x x I 11 24 4.8 2052-474I x xx I 3 3 .8 2121+053Ix x x x x x x x x I 9 11 1.6 2128-123I x xx x I 4 4 2.3 2145+067Ixx x x x xx x x x xx xx x x x x x x I 20 37 5.3 2234+282Ix x x x x x x x x x xx xx x x xx I 18 28 2.8 2255-282I x x xx x I 5 5 1.2 Total scans, obs: 651 1335 Average number of obs. per baseline per source (normalized by up-time) = 3.2 Min = .0 Max = 31.1 (Baseline Gc-Ts on 2128-123) RMS = 5.2 Total time: 1426 minutes ( 23.8 hours). Key: Ap=ALGOPARK Gc=GILCREEK Hh=HARTRAO Ho=HOBART26 Ma=MATERA Ts=TSUKUB32 Ap Gc Hh Ho Ma Ts Avg % obs. time: 25 39 39 28 40 41 35 % cal. time: 3 4 2 2 2 4 3 % slew time: 54 23 36 40 16 19 31 % idle time: 17 32 22 28 40 34 29 # of tapes : 1.5 .7 .6 1.8 .7 .8 total # scans: 260 349 188 223 204 392 269 # scans/hour : 10 14 7 9 8 16 11.2 Avg scan (sec): 83 97 179 108 168 91 121 # OF OBSERVATIONS BY BASELINE | Ap Gc Hh Ho Ma Ts StnTotal -------------------------------------- Ap|260 220 37 8 84 126 475 Gc| 349 8 42 89 251 610 Hh| 188 67 114 31 257 Ho| 223 10 174 301 Ma| 204 74 371 Ts| 392 656 Number of 2-station scans: 392 Number of 3-station scans: 205 Number of 4-station scans: 53 Number of 5-station scans: 1 Number of 6-station scans: 0 Total # of scans, observations: 651 1335 Average baseline components for all observations Average XY = 5345. Average XZ = 5842. Average YZ = 5597. Average length = 7310.