CORE-B902 (Continuous Observations of the Rotation of the Earth-B902) 2001 July 16 Notes prepared by Cynthia Thomas and Nancy Vandenberg,NVI/GSFC Schedule name: CB902.SKD on CDDISA Nominal Start: 17:30 U.T. on July 16 (day 197) first observation at 17:30 U.T. on 4C39.25 for AP-SM-GC-YB first observation at 17:30 U.T. on 2234+282 for 45-HO-UR Nominal Stop: 17:30 U.T. on July 17 (day 198) last observation at 17:10 U.T. on 1334-127 for SM-YB last observation at 17:10 U.T. on 1044+719 for UR last observation at 17:15 U.T. on 1610-771 for 45-HO last observation at 17:21 U.T. on 0458-020 for AP-GC 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) 254 72828201 Crimea C SM 2 (HDT) 186 73323401 DSS45 T 45 1 (TT) 376 16426001 Fairbanks A GC 1 (TT) 263 40476601 Hobart H HO 2 (HDT) 337 72425901 Urumqi U UR 3 (HDT) 210 73303201 Yebes Y YB 2 (HDT) 209 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 117 seconds Median SNR 45.0 at X-band 35.0 at S-band Number of observations 1672 observations Average scans per station 262 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 ==== ========= 01JAN08 IRIS-S158 01JAN10 CORE-3007 01JAN16 NEOS-A403 01JAN23 NEOS-A404 01JAN24 CORE-3008 01JAN30 NEOS-A405 01FEB06 NEOS-A406 01FEB07 CORE-3009 01FEB13 NEOS-A407 01MAR07 CORE-3011 01MAR21 CORE-3012 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 $01JUL16ZZ -------------------------------------------------------------------| | | | Maximum | Correlating | | EOP | Formal | Correlation | Parameter | | Parameters | Errors | | | |------------+----------------+-------------+----------------------| | | | | | | X-Wobble | 47.8 muas | 0.23 | URUMQI X COMPONENT | | Y-Wobble | 54.5 muas | -0.01 | YEBES Z COMPONENT | | UT1-TAI | 2.9 musec | 0.09 | URUMQI Z COMPONENT | | UT1-Rate | 5.6 musec/d | 0.15 | URUMQI Y COMPONENT | |------------|----------------|-------------|----------------------| Procedures ========== Please generate the procedures for this session using drudg. SKED Summary from file ./cb902.skd for experiment CB902 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I xx x x x x x x x x x xI 12 24 2.8 0048-097I x x x x x I 5 18 2.1 0059+581I x x I 2 6 .4 0104-408I x x x x x x x x x x x xI 12 16 3.5 0106+013I xx x x x x x x x x x x I 12 30 3.2 0119+115I x x x x x x x x xx x x I 12 34 3.3 0119+041I x x xI 3 3 .3 0208-512I x x x x x x x x x x x xI 12 12 2.7 0229+131Ix x x I 3 9 1.0 0235+164I x x x x x x x x x x x x x I 13 55 5.4 CTA26 Ix x x x x x x x xx x x x x x x x I 17 34 3.7 0402-362Ix x x x x xx x x x x x x x I 14 14 2.6 0454-234Ix x x x x x xx x x x x x x I 14 24 3.0 0458-020I x x x x x x x x I 8 19 2.1 0530-727I x I 1 1 .2 0528+134I x x x x x x x x x x x x xx x I 15 39 3.6 0537-441Ix x x x x x x x x x x I 11 11 2.7 0552+398I xx xx x x x x x x x x x x x x x x x x xI 21 122 10.6 0556+238I x x x x I 4 4 .3 0637-752I x x x x x x x x x x x x x x x x I 16 16 2.7 0718+793I x x x x x x x x x x x x x x xI 15 15 1.0 0727-115I x x x x x x x xx xx x x x x xI 16 42 5.1 0749+540I x x x x x I 5 13 .9 0804+499I x x xI 3 9 .7 0805+410I x x x x x x x x I 8 10 .7 0823+033I x x x x xx x x x x x x x I 13 25 2.6 OJ287 I x x x xx x x x x xx x x x x x x xI 18 81 7.8 4C39.25 I x x x x x x x x x x x x x x x x x I 17 95 8.6 OK290 I x x x xI 4 4 .3 0955+476I x x x x x x x x x x I 10 54 4.8 1034-293I x x x x x x x x x x x xI 12 12 1.1 1044+719I x x xx x x x I 7 34 2.3 1053+815I x I 1 3 .2 1057-797I x x x x x x x x x x x x x x I 14 14 2.3 1104-445I x x x x x x x x x x x x I 12 12 3.0 1124-186I x x x x x x x x x x x x x x xI 15 25 3.3 1128+385I x x x x x x x x x x x I 11 55 4.2 1144-379I x x x x x I 5 11 1.4 1219+044Ix xx x x x x x x x x x I 12 26 2.7 1255-316I x x x x x x x x x x x x x I 13 13 1.5 1300+580I x x x x I 4 15 1.0 1334-127I x x x x x x x x x x x xx x x x I 16 28 4.2 1351-018Ix xx x x x x x x x x x I 12 14 1.5 1357+769Ix x x x x x x x x I 9 90 6.0 1424-418I x x x x x x x x x I 9 9 2.3 1451-375I x x x x x I 5 5 1.2 1606+106Ix x x x x x xx x xx xx xx x x x I 18 60 6.0 1610-771I x x x x x x x x x x x x x xx x x x x I 19 19 3.2 1622-253I x x x x x x x x x x x xx x x I 15 15 2.0 NRAO512 Ix x x x x x x x I 8 10 .7 1726+455I x x x x x I 5 7 1.1 1739+522I x x I 2 6 .4 1741-038Ix x x x x x x x x x x x x x x x x x I 18 34 3.8 1749+096Ix x x x x xx x x x x x x x x x x xx x I 20 86 8.8 1815-553I x x x x x x x x x x x x x x x x I 16 16 3.4 1908-201I xx x x x x x x x x x x x xI 14 16 2.2 1921-293Ix x x x x x x x x x I 10 10 1.3 1954-388I x x x x x x x x x I 9 9 1.2 1958-179I x x x x x x x x I 8 21 2.7 2052-474I x x x x x x x xx x x x x I 13 13 3.1 2121+053I x x x x x x x x x x x x x x x x xI 17 58 6.0 2128-123I x xx x x x x x x x x x x x x xI 16 16 1.8 2134+00 I x I 1 1 .1 2145+067I x x x x x x x x x I 9 22 2.3 2234+282I x x x x x x x xx x x I 11 33 3.1 2255-282Ixx x x x x x x x x x x x x x I 15 15 2.0 Total scans, obs: 717 1672 Average number of obs. per baseline per source (normalized by up-time) = 2.9 Min = .0 Max = 28.8 (Baseline Ho-Ur on 4C39.25 ) RMS = 4.7 Total time: 1433 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: 24 33 34 36 33 38 34 33 % cal. time: 2 2 4 3 3 2 2 3 % slew time: 53 24 37 17 47 24 20 32 % idle time: 18 39 23 42 15 34 42 30 # of tapes : 1.4 2.0 .6 .6 1.9 2.2 2.0 total # scans: 254 186 376 263 337 210 209 262 # scans/hour : 10 7 15 11 14 8 8 10.9 Avg scan (sec): 82 156 79 119 84 157 142 117 # OF OBSERVATIONS BY BASELINE | Ap Sm 45 Gc Ho Ur Yb StnTotal ------------------------------------------ Ap|254 67 21 186 11 65 111 461 Sm| 186 20 56 11 117 154 425 45| 376 72 336 79 3 531 Gc| 263 40 108 67 529 Ho| 337 55 2 455 Ur| 210 91 515 Yb| 209 428 Number of 2-station scans: 442 Number of 3-station scans: 176 Number of 4-station scans: 72 Number of 5-station scans: 27 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 717 1672 Average baseline components for all observations Average XY = 4546. Average XZ = 4098. Average YZ = 4454. Average length = 5579.