CORE-B904 (Continuous Observations of the Rotation of the Earth-B904) 2001 October 18 Notes prepared by Cynthia Thomas and Nancy Vandenberg,NVI/GSFC Schedule name: CB904.SKD on CDDISA Nominal Start: 19:00 U.T. on October 18 (day 291) first observation at 19:00 U.T. on 4C39.25 for AP-GC-KK-UR first observation at 19:00 U.T. on 0235+164 for SM-HO Nominal Stop: 19:00 U.T. on October 19 (day 292) last observation at 18:47 U.T. on 0229+131 for HO-UR last observation at 18:48 U.T. on 1128+385 for AP-GC-KK last observation at 18:49 U.T. on 2255-282 for SM-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) 264 72828201 Crimea C SM 3 (HDT) 210 73323401 Fairbanks A GC 1 (TT) 307 40476601 Hobart H HO 2 (HDT) 154 72425901 Kokee K KK 1 (TT) 347 72983001 Urumqi U UR 3 (HDT) 216 73303201 Yebes Y YB 2 (HDT) 199 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 and Simeiz baselines 20 at X-band for other baselines 12 at S-band for Yebes and Simeiz baselines 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 128 seconds Median SNR 35.0 at X-band 30.0 at S-band Number of observations 1877 observations Average scans per station 242 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 ==== ========= 01JUN13 CORE-3018 01JUN20 CORE-C102 01JUN27 CORE-3019 01JUL11 CORE-3020 01JUL03 CORE-C202 01JUL25 CORE-3022 01AUG08 CORE-3024 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-B network. Also shown in the table are the maximum correlations between the Earth orientation parameters and other parameters. Simulation for experiment $01OCT18ZK -------------------------------------------------------------------| | | | Maximum | Correlating | | EOP | Formal | Correlation | Parameter | | Parameters | Errors | | | |------------+----------------+-------------+----------------------| | | | | | | X-Wobble | 79.3 muas | 0.14 | URUMQI X COMPONENT | | Y-Wobble | 68.6 muas | -0.01 | YEBES Z COMPONENT | | UT1-TAI | 3.7 musec | 0.04 | YEBES Y COMPONENT | | UT1-Rate | 8.6 musec/d | -0.01 | YEBES Z COMPONENT | |------------|----------------|-------------|----------------------| Procedures ========== Please generate the procedures for this session using drudg. SKED Summary from file ./cb904.skd for experiment CB904 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x x xx x xx x x x x x x x x xx x I 18 34 4.2 0048-097I x x x x x x I 6 14 1.8 0059+581I x x x I 3 15 .9 0104-408I x x x x x x x x x I 9 9 1.2 0106+013I x x x x x x x x x x x x x I 13 42 4.5 0119+115I x x x x x x x x xx x x x x I 14 44 4.0 0119+041I x I 1 3 .3 0208-512I x I 1 1 .2 0229+131I x x x x x x x I 7 13 1.2 0235+164I x xx x x x x x x x x xx x x x I 16 76 7.0 CTA26 I x x x xx x x x x x x xx x x x xI 17 39 4.4 0402-362I I 0 0 .0 0454-234Ix x x x x x x x x x x x x x x xx x x x I 20 30 4.7 0458-020I x x x x x x x x x x x x xI 13 27 3.1 0530-727I I 0 0 .0 0528+134I x x x x x x x x x xx x x xx x xxx x xI 21 55 4.9 0537-441I x x x x x x I 6 6 1.6 0552+398Ix x x x x x x x x x x x x x x x xx x x I 20 138 10.8 0556+238I x x x I 3 5 .4 0637-752I I 0 0 .0 0718+793I x x x x x x x x x x x I 11 25 1.4 0727-115Ix xx xx x x x x x x x x x x x x x x x x I 21 43 6.5 0749+540I x x x x x x xI 7 22 1.3 0804+499I x I 1 3 .2 0805+410I x x x x I 4 10 .7 0823+033I x xx x x xx xx x x x I 12 20 2.1 OJ287 Ix xx x x x x x x x x x x x x x x xx x I 20 87 7.7 4C39.25 Ix x x x x x x x x x x x x x x x x I 17 119 8.0 OK290 I x x x x x x x x x xI 10 10 .8 0955+476I x x x x x x xI 7 62 4.5 1034-293I x xx x x x x x x x xI 11 11 1.9 1044+719I x x x x x x x x I 8 23 1.3 1053+815I x x I 2 6 .3 1057-797I I 0 0 .0 1104-445I x I 1 1 .3 1124-186I x x x x x x x x x x xx x x I 14 20 3.1 1128+385I x x x x x x xI 7 33 2.2 1144-379I x x x x x x xx x x xI 11 11 2.1 1219+044I x x x x x x x x x x x x x x x I 15 29 3.0 1255-316I x x x x I 4 4 1.2 1300+580Ix x x I 3 35 2.2 1334-127I I 0 0 .0 1351-018I I 0 0 .0 1357+769I x x x x x x x x x x x x x x x x x x I 18 250 13.9 1424-418I x x x I 3 3 .8 1451-375I x I 1 1 .1 1606+106I xx x x xx x x x x x x x x x xx x x x xI 21 80 7.7 1610-771I I 0 0 .0 1622-253I x x x x x x xx x x I 10 10 1.6 NRAO512 Ix x x x x x x x xx x x I 12 28 2.0 1726+455I x x x x x x I 6 22 1.6 1739+522I x x x x x x x x x x x I 11 23 1.3 1741-038I x x x x x x x x x x x x xx x x x x x xI 20 42 4.9 1749+096I x xx xx x x x x x x x x xx x x x xx x x xI 23 97 9.4 1815-553Ix x I 2 2 .4 1908-201Ix x x x xx x I 7 7 1.4 1921-293I x x I 2 2 .5 1954-388I x x x x x x I 6 6 .8 1958-179I xx x x x x x x x x x xx x x x x I 17 36 5.1 2052-474I I 0 0 .0 2121+053I x x x x x x x x xx x x x x x x xI 17 66 6.7 2128-123I x x x x x x x xx x x x xI 13 15 3.0 2134+00 I I 0 0 .0 2145+067I x x x x x I 5 15 1.5 2234+282I x x x x x x x x x x x x x I 13 42 3.1 2255-282Ix x x x x I 5 5 1.2 Total scans, obs: 586 1877 Average number of obs. per baseline per source (normalized by up-time) = 3.1 Min = .0 Max = 30.9 (Baseline Gc-Kk on 2128-123) RMS = 5.0 Total time: 1432 minutes ( 23.9 hours). Key: Ap=ALGOPARK Sm=CRIMEA Gc=GILCREEK Ho=HOBART26 Kk=KOKEE Ur=URUMQI Yb=YEBES Ap Sm Gc Ho Kk Ur Yb Avg % obs. time: 23 37 36 26 47 39 33 35 % cal. time: 3 2 3 1 4 2 2 2 % slew time: 54 28 21 30 17 25 19 28 % idle time: 18 31 38 40 30 32 44 33 # of tapes : 1.3 2.1 .6 1.6 .8 2.3 1.9 total # scans: 264 210 307 154 347 216 199 242 # scans/hour : 11 8 12 6 14 9 8 10.1 Avg scan (sec): 77 154 101 149 118 156 146 128 # OF OBSERVATIONS BY BASELINE | Ap Sm Gc Ho Kk Ur Yb StnTotal ------------------------------------------ Ap|264 69 192 8 171 51 97 588 Sm| 210 67 21 37 145 160 499 Gc| 307 43 255 98 61 716 Ho| 154 117 66 2 257 Kk| 347 84 31 695 Ur| 216 102 546 Yb| 199 453 Number of 2-station scans: 233 Number of 3-station scans: 235 Number of 4-station scans: 79 Number of 5-station scans: 24 Number of 6-station scans: 15 Number of 7-station scans: 0 Total # of scans, observations: 586 1877 Average baseline components for all observations Average XY = 5580. Average XZ = 4991. Average YZ = 4669. Average length = 6466.