CORE-1006 (Continuous Observations of the Rotation of the Earth-1006) 2000 November 27 Notes prepared by Cynthia Thomas and Nancy Vandenberg,NVI/GSFC Session code: C1006 Schedule file: nov00/c1006.skd on CDDISA Nominal Start: 17:30 U.T. on November 27 (day 332) first observation at 17:30 U.T. on 0749+540 for AP-GC-MA-TS first observation at 17:30 U.T. on 0104-408 for HH-HO Nominal Stop: 17:30 U.T. on November 28 (day 333) last observation at 17:15 U.T. on 0556+238 for GC last observation at 17:19 U.T. on 0048-097 for HH last observation at 17:22 U.T. on 1741-038 for AP-MA last observation at 17:23 U.T. on CTA26 for HO-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) 271 72828201 Fairbanks A GC 1 (TT) 343 40476601 HartRAO J HH 1 (TT) 191 72326201 Hobart H HO 2 (HDT) 225 72425901 Matera I MA 1 (TT) 270 72435701 Tsukuba T TS 1 (TT) 382 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 10 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 111 sec Average SNR 66.4 at X-band, 48.9 at S-band Number of observations (delay measurements) 1395 obs Average number of scans per station 280 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 ==== ========= 00MAY02 NEOS-A366 00MAY08 IRIS-S150 00MAY09 NEOS-A367 00MAY10 CORE-B701 00MAY15 EUROPE-56 00MAY16 NEOS-A368 00MAY23 NEOS-A369 00MAY30 NEOS-A370 00JUN06 NEOS-A371 Simulation Results ================== Simulated data from this schedule was used in a global solution to estimate the formal errors. The table below lists the formal errors for Earth orientation parameters. These results meet the simulation goals for the CORE-1 network. Also shown in the table are the maximum correlations between the Earth orientation parameters and other parameters. Simulation for experiment $00NOV27ZZ -------------------------------------------------------------------| | | | Maximum | Correlating | | EOP | Formal | Correlation | Parameter | | Parameters | Errors | | | |------------+----------------+-------------+----------------------| | | | | | | X-Wobble | 27.4 mas | -0.38 | TSUKUB32 Z COMPONENT | | Y-Wobble | 47.6 mas | -0.52 | TSUKUB32 Z COMPONENT | | UT1-TAI | 2.2 musec | -0.03 | TSUKUB32 Z COMPONENT | | UT1-Rate | 2.9 musec/d | 0.25 | TSUKUB32 Z COMPONENT | |------------|----------------|-------------|----------------------| Procedures ========== Please generate the procedures for this session using drudg. SKED Summary from file ./c1006.skd for experiment C1006 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x xx xx x x x xx x x x x x x xx x x I 20 33 5.3 0048-097I x x x x x x x xxx x xx I 13 30 5.2 0059+581I x x I 2 12 1.2 0104-408I x xx x xx x x xx xxx x xx I 16 20 6.0 0119+115I xx x xx x xx x xx x x x x x x xI 18 32 4.2 0119+041I xx x xx xx x x x x x x xx x x x x x I 20 40 5.9 0208-512I I 0 0 .0 0229+131I xx x x xx x x I 8 10 1.4 0235+164I x x x x x x x I 7 22 2.8 CTA26 I x x x xx x x x x xx I 11 11 1.8 0402-362I x x x x I 4 4 1.2 0454-234Ix x x x x x x xx xx xx x x x x xxI 19 25 4.6 0458-020Ix x x x x xx x xxx x x x x I 15 29 4.6 0528+134I x x x x x x x x xx x xx x x x I 16 26 3.3 0537-441Ix x x xx xx x xx x x xI 13 15 4.3 0552+398Ix x x x x x x xx x x x xx x x x x x xx x I 22 83 9.7 0556+238I x x x x x x x x x x x xx xx xI 16 18 1.9 0637-752I x x x x I 4 4 1.6 0727-115Ixx x xx x x x x x x x x x x I 15 30 5.6 0749+540I xx x x x x x x x x x x x xx x x x xI 19 105 10.6 0804+499I x x x I 3 9 1.0 0805+410I x I 1 3 .3 0823+033Ix xx x xx x xx x x xx x xxx x x I 19 21 3.1 OJ287 I x x x xx x x x x x x xx x x I 15 17 2.1 0919-260I I 0 0 .0 0920-397I I 0 0 .0 4C39.25 I x x xx x xx x x x x x x x xx I 16 50 6.5 OK290 I x x x x x x xx x x I 10 10 1.1 0955+476I x x xx x x x x x I 9 33 3.8 1034-293Ix x xx xx x x xx xx xx xx x I 17 17 2.7 1044+719I x x x x x x x x x I 9 38 3.8 1053+815Ix x x x x I 5 13 1.3 1057-797I x x x x I 4 4 1.6 1104-445I x x I 2 2 .5 1124-186I x xx x xx xx xx x xx x x x xx xx xI 21 33 6.3 1128+385I x x x x x x x x x I 9 27 2.3 1144-379I xx x x x xx xx x x x x xI 14 22 6.8 1219+044Ixx x x xx xx x x x x x x x x x xx x x xx I 23 58 8.6 1255-316I I 0 0 .0 1300+580I x x x x x x x x x x I 10 22 2.2 1313-333I I 0 0 .0 1334-127Ix x x x x x x x x xx x x x I 14 20 5.9 1351-018Ix x x x x x x x x x x x xI 13 15 2.4 1357+769I x x x x x x xI 7 39 3.9 1424-418Ix x xI 3 3 .8 1451-375I x x I 2 2 .7 1606+106I xx xx x x x xx x xx x x x x x x x xx x x xxI 25 54 7.4 1622-253I I 0 0 .0 NRAO512 Ix x x xx x x x x x xx x xx x x x I 18 53 5.2 1726+455I x x x x x x x I 7 11 1.3 1739+522Ix x x x x x x x I 8 19 2.0 1741-038Ix x x xx xx x x x xx x x x x x xx x xxI 22 24 3.9 1749+096I xx x x x x x x I 8 31 4.5 1815-553I x x x I 3 3 1.2 1908-201I xx xx x xx x x x x x xx x x I 16 16 2.8 1954-388I x xx xx xx x x x xx I 12 12 3.3 1958-179I x x xx x x x x x x x x I 12 27 5.3 2052-474I x x x I 3 3 .8 2121+053I x x x xx xx x x x xx x xx xxx x x x x x x xI 25 69 10.1 2128-123I x x x x I 4 4 1.7 2145+067I x x x x x x I 6 10 1.4 2234+282Ix x xx x xx xx x xx xx x x x x x x x xI 22 49 5.1 2255-282I x x I 2 2 .6 Total scans, obs: 677 1394 Average number of obs. per baseline per source (normalized by up-time) = 3.5 Min = .0 Max = 28.8 (Baseline Ho-Ts on 4C39.25 ) RMS = 5.4 Total time: 1434 minutes ( 23.9 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 33 28 43 42 35 % cal. time: 3 3 2 2 3 4 3 % slew time: 52 21 38 39 19 18 31 % idle time: 19 34 25 28 34 35 29 # of tapes : 1.4 .6 .5 1.7 .7 .7 total # scans: 271 343 191 225 270 382 280 # scans/hour : 11 14 7 9 11 15 11.7 Avg scan (sec): 79 99 148 109 138 95 111 # OF OBSERVATIONS BY BASELINE | Ap Gc Hh Ho Ma Ts StnTotal -------------------------------------- Ap|271 211 33 12 124 101 481 Gc| 343 8 47 99 229 594 Hh| 191 66 139 37 283 Ho| 225 20 179 324 Ma| 270 89 471 Ts| 382 635 Number of 2-station scans: 410 Number of 3-station scans: 206 Number of 4-station scans: 61 Number of 5-station scans: 0 Number of 6-station scans: 0 Total # of scans, observations: 677 1394 Average baseline components for all observations Average XY = 5331. Average XZ = 6016. Average YZ = 5615. Average length = 7395.