CORE-B903 (Continuous Observations of the Rotation of the Earth-B903) 2001 August 13 Notes prepared by Cynthia Thomas and Nancy Vandenberg,NVI/GSFC Schedule name: CB903.SKD on CDDISA Nominal Start: 17:30 U.T. on August 13 (day 225) first observation at 17:30 U.T. on 0106+013 for 45-HO-UR first observation at 17:30 U.T. on 1128+385 for AP-SM-GC-YB Nominal Stop: 17:30 U.T. on August 14 (day 226) last observation at 17:15 U.T. on 0805+410 for AP-GC last observation at 17:16 U.T. on 1749+096 for SM-UR-YB last observation at 17:18 U.T. on 0637-752 for 45-HO 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) 248 72828201 Crimea C SM 2 (HDT) 182 73323401 DSS45 T 45 1 (TT) 382 16426001 Fairbanks A GC 1 (TT) 253 40476601 Hobart H HO 2 (HDT) 351 72425901 Urumqi U UR 3 (HDT) 208 73303201 Yebes Y YB 3 (HDT) 207 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 120 seconds Median SNR 45.0 at X-band 35.0 at S-band Number of observations 1610 observations Average scans per station 261 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 ==== ========= 01MAR07 CORE-3011 01MAR19 IRIS-S160 01MAR21 CORE-3012 01MAR26 CONT-M1 01APR02 IRIS-S161 01APR04 CORE-3013 01APR18 CORE-3014 01MAY02 CORE-3015 01MAY24 IRIS-S162 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 $01AUG13ZZ -------------------------------------------------------------------| | | | Maximum | Correlating | | EOP | Formal | Correlation | Parameter | | Parameters | Errors | | | |------------+----------------+-------------+----------------------| | | | | | | X-Wobble | 67.5 muas | 0.14 | URUMQI X COMPONENT | | Y-Wobble | 73.9 muas | 0.02 | YEBES Z COMPONENT | | UT1-TAI | 3.4 musec | 0.06 | YEBES Y COMPONENT | | UT1-Rate | 7.5 musec/d | 0.06 | URUMQI X COMPONENT | |------------|----------------|-------------|----------------------| Procedures ========== Please generate the procedures for this session using drudg. SKED Summary from file ./cb903.skd for experiment CB903 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x x xx x x x x x x x x x x x x xI 17 29 3.3 0048-097I x x x x x x I 6 21 2.5 0059+581I x I 1 3 .2 0104-408I x x x x x x x x x x x xI 12 16 3.5 0106+013I x x x xx x x x x x x xI 12 35 3.7 0119+115Ix x x x x x x x x x x x x x x I 15 42 4.0 0119+041I x x x x x x I 6 6 .6 0208-512I x x x x x x x x x xx x x x xI 15 15 3.4 0229+131I x x x I 3 7 .8 0235+164I x x x x x xx x x x x x x x x I 15 68 6.6 CTA26 Ix x x x x x x x x x x I 11 23 2.5 0402-362I x x x x x x x x x x x x x xI 14 14 2.3 0454-234Ix x x xx x x x x x x x x x I 14 24 2.9 0458-020Ix x xx x x x x x I 9 13 1.4 0530-727I x x x I 3 3 .5 0528+134I xx x x x x xx x x x x x x I 14 35 3.2 0537-441I x x x x x x xx x x x xI 12 12 3.0 0552+398Ix x x x x x xx x x x x x x x xxx x x x I 21 116 9.5 0556+238I x x x x x x x x I 8 8 .7 0637-752Ix x x x x x x x x x x x x x x I 15 15 2.5 0718+793I x x x x x x x x x x x x x x x xI 16 16 1.1 0727-115Ix x x x x x xx x x x x x x x x x x x I 19 49 6.2 0749+540I x x x x x x x x x I 9 19 1.3 0804+499I x x x x x x x xI 8 18 1.3 0805+410I x x x x x x x x I 8 14 .9 0823+033I x x x x x x x x x x x x I 12 22 2.3 OJ287 I I 0 0 .0 4C39.25 I x x x x x x x x x x x x x x x x x x xI 19 111 8.3 OK290 I I 0 0 .0 0955+476I x x x x x x x x x I 9 44 4.1 1034-293I x x x x x x x x x x x x I 12 12 1.1 1044+719I x x x x x x I 6 30 2.0 1053+815I x I 1 3 .2 1057-797I x x x x x x x x x x x x x xx x x x xI 19 19 3.2 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 I 9 43 3.4 1144-379I x x x x x x I 6 12 2.1 1219+044Ix x x x x x x x x x I 10 19 2.0 1255-316I x x x x x x x x x x x x x x x I 15 15 1.9 1300+580I x x x x xI 5 18 1.2 1334-127I x x x xx xx x x x x x x x x x I 16 26 4.0 1351-018I x x x x x x x x xI 9 9 1.0 1357+769I x x x x x x x x x x x I 11 110 7.3 1424-418I x x x x x x x x x xI 10 10 2.5 1451-375I x x x x x x I 6 6 .8 1606+106Ix xx x x x x x x xx x x xx x x x x I 19 57 5.7 1610-771I x x x x x x x x x x x x x x x x xI 17 17 2.8 1622-253I x x x x x x x x x x x x x I 13 13 1.5 NRAO512 I x x x x x x I 6 8 .5 1726+455I x x x x x x I 6 10 .6 1739+522I x x x I 3 5 .4 1741-038Ix x xx x x x x x x x xx x x x x I 17 33 3.7 1749+096Ix x x x x xx x x x x x x x x x x x x x x I 21 82 8.2 1815-553I x x x x x x x x x x x x x x x x I 16 16 3.4 1908-201Ix x x x x x x x x x x x x I 13 15 2.1 1921-293I x 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 x I 10 10 1.3 1958-179Ix x x xx x x x x x x x x x I 14 29 3.8 2052-474I x x x x x x x x x x x x I 12 12 2.9 2121+053Ix x x x x x x x x x x x xx x x I 16 54 5.6 2128-123I x x x x x x x x x x x x x x x xI 16 18 2.1 2134+00 I x I 1 1 .1 2145+067I x x x x I 4 10 1.0 2234+282I x x x x x x x x x xx x I 12 26 2.2 2255-282Ix x x x x x x x x x x x x x x x x I 17 17 2.3 Total scans, obs: 728 1610 Average number of obs. per baseline per source (normalized by up-time) = 2.7 Min = .0 Max = 25.9 (Baseline Gc-Ho on 1334-127) RMS = 4.8 Total time: 1430 minutes ( 23.8 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 34 33 36 33 40 36 34 % cal. time: 2 2 4 2 4 2 2 3 % slew time: 53 25 38 16 46 23 20 32 % idle time: 18 38 23 44 15 33 40 30 # of tapes : 1.4 2.0 .5 .6 1.9 2.3 2.1 total # scans: 248 182 382 253 351 208 207 261 # scans/hour : 10 7 16 10 14 8 8 10.9 Avg scan (sec): 85 161 74 122 82 166 152 120 # OF OBSERVATIONS BY BASELINE | Ap Sm 45 Gc Ho Ur Yb StnTotal ------------------------------------------ Ap|248 64 21 192 6 68 103 454 Sm| 182 11 51 8 109 163 406 45| 382 55 350 65 0 502 Gc| 253 31 106 64 499 Ho| 351 48 0 443 Ur| 208 95 491 Yb| 207 425 Number of 2-station scans: 459 Number of 3-station scans: 189 Number of 4-station scans: 54 Number of 5-station scans: 26 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 728 1610 Average baseline components for all observations Average XY = 4431. Average XZ = 3778. Average YZ = 4217. Average length = 5299.