CORE-B901 (Continuous Observations of the Rotation of the Earth-B901) 2001 May 7 Notes prepared by Cynthia Thomas and Nancy Vandenberg,NVI/GSFC Schedule name: CB901.SKD on CDDISA Nominal Start: 17:30 U.T. on May 7 (day 127) first observation at 17:30 U.T. on 4C39.25 for AP-SM-GC-UR-YB first observation at 17:30 U.T. on 0104-408 for 45-HO Nominal Stop: 17:30 U.T. on May 8 (day 128) last observation at 16:58 U.T. on 1128+385 for SM last observation at 17:03 U.T. on 1124-186 for UR last observation at 17:12 U.T. on 1741-038 for 45-HO last observation at 17:13 U.T. on 0119+041 for GC last observation at 17:22 U.T. on 0454-234 for AP-YB Correlator: Washington **Frequency Sequence**: CDPSX - Standard CDP SX sequence. (360 MHz wide at X, 85 MHz wide at S) 1 letter 2 letter Station Code Code # of tapes # of obs Occupation Code Algonquin G AP 2 (HDT) 271 72828201 Crimea C SM 2 (HDT) 150 73323401 DSS45 T 45 1 (TT) 378 16426001 Fairbanks A GC 1 (TT) 272 40476601 Hobart H HO 2 (HDT) 336 72425901 Urumqi U UR 3 (HDT) 210 73303201 Yebes Y YB 2 (HDT) 183 73333601 Purpose ======= The purpose of CORE-B is to provide observing sessions during which the stations can demonstrate their performance and their ability to participate in future regular CORE sessions. This CORE-B network is numbered 9 to distinguish it from the networks used in 2000. 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 15 at X-band for Yebes baselines only 20 at X-band for other baselines 12 at S-band for Yebes baselines only 15 at X-band for other baselines 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 60% of ranked scans for selection, consider the last 1 hour 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 118 seconds Median SNR 40.0 at X-band 35.0 at S-band Number of observations 1579 observations Average scans per station 257 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 ==== ========= 00NOV14 NEOS-A394 00NOV28 NEOS-A396 00DEC12 NEOS-A398 01JAN08 IRIS-S158 01JAN16 NEOS-A403 01JAN23 NEOS-A404 01JAN30 NEOS-A405 01FEB06 NEOS-A406 01FEB13 NEOS-A407 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-3 network. Also shown in the table are the maximum correlations between the Earth orientation parameters and other parameters. Simulation for experiment $01MAY07ZZ -------------------------------------------------------------------| | | | Maximum | Correlating | | EOP | Formal | Correlation | Parameter | | Parameters | Errors | | | |------------+----------------+-------------+----------------------| | | | | | | X-Wobble | 58.1 mas | 0.25 | URUMQI X COMPONENT | | Y-Wobble | 61.5 mas | 0.00 | YEBES Z COMPONENT | | UT1-TAI | 3.2 musec | 0.09 | URUMQI Y COMPONENT | | UT1-Rate | 5.7 musec/d | 0.14 | URUMQI X COMPONENT | |------------|----------------|-------------|----------------------| Procedures ========== Please generate the procedures for this session using drudg. SKED Summary from file ./cb901.skd for experiment CB901 (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 I 12 24 2.7 0048-097I x x x x x xx x x x x I 11 30 3.4 0059+581I x x x xI 4 15 1.1 0104-408I x x x x x x x x x x x xI 12 16 3.5 0106+013I x x x x x x x x x I 9 22 2.4 0119+115Ix x x x x x x x x x x x I 12 34 3.3 0119+041I x x x x I 4 6 .6 0208-512I x x x x x x xx x x x x xI 13 13 2.9 0229+131I I 0 0 .0 0235+164I I 0 0 .0 CTA26 I x x x x x x x xx x x x x I 13 29 3.2 0402-362I x x x x x x x x x x xI 11 11 1.5 0454-234I x x xx x x x x x xx x x x xI 15 32 4.1 0458-020Ixx x x x xxx x x x I 11 22 2.4 0530-727I x x I 2 2 .3 0528+134I x x x x x xx x x x x x xI 13 32 3.0 0537-441I x x x x x x x x x x x xI 12 12 3.0 0552+398Ix x x x x x x x x x x x x x x x x x x x I 20 93 8.1 0556+238I x x x I 3 3 .2 0637-752I x x x x x x x x x x x x x x x x xI 17 17 2.8 0718+793Ix x x x x x x x x x x x x x x x I 16 32 2.1 0727-115I x x x x x x xx x x x x x I 13 28 3.2 0749+540I x x x x x x x x I 8 54 4.0 0804+499Ix x x x x x I 6 27 2.1 0805+410I x x x x x x x x x x I 10 25 2.1 0823+033Ix x x x x x x x x x x x xx x I 15 27 2.8 OJ287 I x xx xx x x x x x x x x xx x x x I 18 62 6.0 4C39.25 I x x x x x x x x x x x x x x x x x x I 18 101 9.2 OK290 I x x x x x x I 6 8 .7 0955+476I x x x x x I 5 21 2.5 1034-293I x x x x x x x x x x x x I 12 16 2.0 1044+719I x x x x x x x x x x x xI 12 39 2.6 1053+815I x I 1 1 .1 1057-797I x x x x x x x x x x x x x x x x x xI 18 18 3.0 1104-445I x x x x x x x x x x x I 11 11 2.7 1124-186Ix x x x x x x x x x x xx x x I 15 33 4.4 1128+385I x x x x x x x x x x x x x x I 14 35 3.2 1144-379I x x x x x x x I 7 15 3.1 1219+044I x x x xx x x I 7 9 .9 1255-316I x x x x x x x x x I 9 9 .8 1300+580I x x x x x x x x x x x x x x x x xI 17 29 2.0 1334-127Ix x x x x x x x x x x x I 12 22 2.7 1351-018I x x x xx x x x x x x x I 12 18 2.0 1357+769I x x x x x x x x xI 9 78 5.2 1424-418I x x x x x x x x x x x I 11 11 2.8 1451-375I x x x x I 4 4 .5 1606+106I x x x x x x x x x x x x x x x x x I 17 44 4.4 1610-771I x x x x x x x x x x x x x x x x x xI 18 18 3.0 1622-253I x x x x x x x x I 8 10 1.4 NRAO512 I x x x x x x I 6 19 1.4 1726+455I x x x x x x I 6 12 .8 1739+522I x x x I 3 12 .9 1741-038Ix x x x x x x xx x x x xx x x x x x x x x I 22 38 4.2 1749+096I x x x x x xx x x x x x x x xx x x xx xI 21 73 7.4 1815-553Ix x x x x x x x x x x x x x x x I 16 16 3.4 1908-201I x x x x x x x x x x I 10 12 1.7 1921-293Ix x x xx x x x x I 9 11 1.3 1954-388I x x x x x x x I 7 9 2.4 1958-179Ix x x x x x x x x I 9 24 2.9 2052-474Ix x x x x x x x x x x x x I 13 13 3.1 2121+053I x x x x x x x I 7 11 1.1 2128-123Ix x x x x x x xx xx x x I 13 17 1.9 2134+00 I x x x x x I 5 5 .5 2145+067Ix x x x xx x x x xx x x x x I 15 38 3.9 2234+282I x x x x x x x x x x x x x I 13 35 3.1 2255-282I x xx x x x x x x x x x x x I 14 16 1.9 Total scans, obs: 712 1579 Average number of obs. per baseline per source (normalized by up-time) = 2.6 Min = .0 Max = 22.6 (Baseline 45-Ho on 2255-282) RMS = 4.3 Total time: 1434 minutes ( 23.9 hours). Key: Ap=ALGOPARK Sm=CRIMEA 45=DSS45 Gc=GILCREEK Ho=HOBART26 Ur=URUMQI Yb=YEBES Ap Sm 45 Gc Ho Ur Yb Avg % obs. time: 25 25 34 40 30 41 31 32 % cal. time: 3 1 4 3 3 2 2 2 % slew time: 54 23 38 17 46 23 17 31 % idle time: 16 49 22 39 19 32 48 32 # of tapes : 1.4 1.5 .5 .6 1.7 2.3 1.9 total # scans: 271 150 378 272 336 210 183 257 # scans/hour : 11 6 15 11 14 8 7 10.7 Avg scan (sec): 81 147 78 126 78 171 147 118 # OF OBSERVATIONS BY BASELINE | Ap Sm 45 Gc Ho Ur Yb StnTotal ------------------------------------------ Ap|271 61 19 200 7 66 116 469 Sm| 150 40 67 31 100 76 375 45| 378 64 335 67 1 526 Gc| 272 28 106 61 526 Ho| 336 42 0 443 Ur| 210 92 473 Yb| 183 346 Number of 2-station scans: 431 Number of 3-station scans: 206 Number of 4-station scans: 55 Number of 5-station scans: 20 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 712 1579 Average baseline components for all observations Average XY = 4686. Average XZ = 4242. Average YZ = 4470. Average length = 5693.