CORE-A019 (Continuous Observations of the Rotation of the Earth-A019) 1997 September 23 Notes prepared by Cynthia Thomas, NVI/GSFC Schedule name: CA019.SKD on CDDIS Nominal Start: 18:00 U.T. on September 23 (day 266) first observation at 18:00 U.T. on 1741-038 for HH-MA-WF first observation at 18:00 U.T. on 0528+134 for GC-HO Duration: 24 hours Nominal Stop: 18:00 U.T. on September 24 (day 267) last observation at 17:55 U.T. on 1610-771 for HH-HO last observation at 18:00 U.T. on 1357+769 for GC-MA-WF Correlator: Haystack **Frequency Sequence**: CDP-WBCA - Modified CDP wide-band SX sequence. (720 MHz wide at X, 125 MHz wide at S), Shifted to avoid RFI at Matera 1 letter 2 letter Station Code Code # of tapes # of obs Occupation Code Fairbanks A GC 1 (TT) 417 40476601 HartRAO J HH 3 (HDT) 285 72326201 Hobart H HO 2 (HDT) 216 72425901 Matera I MA 3 (HDT) 382 72435701 Westford E WF 1 (TT) 407 72097301 Purpose ======= The purpose of the CORE-A sessions is to measure EOP simultaneously with NEOS, using a network of comparable precision, to assess the true accuracy of VLBI results. Both daily and hourly estimates of EOP for the NEOS and CORE-A sessions will be compared in detail. We hope to determine if there are any systematic differences between measurements of EOP with different networks because we will have sufficient data to make statistically significant studies. This is probably the most important set of experiments for this pre-CORE year because it will provide such a rich comparison data set. Schedule ======== This is a new schedule generated by C. Thomas with the automatic mode of sked. The following are the characteristics of the schedule: 1) This schedule was optimized for sky coverage. 2) Only the observations in the previous hour of the schedule were considered for the minor options. The best 70% of the configurations were considered for minor options. 3) The "minor options" were set to select observations to maximize the total number of observations, to minimize the idle time between scans, and to minimize time between scans on the same source by twenty minutes. 5) The minimum SNR limits for most baselines were set to 20 for X-band and 15 for S-band. 6) This schedule was made using 47 sources which helped improve the sky coverage. 7) The source models were updated as of the middle of December by Dave Shaffer. Procedures ========== Please use the modified CDP Wide-band SX sequence, CDP-WBCA, for this experiment. Correlation ========== This experiment will be correlated at the Haystack Correlator with all baselines being correlated. SKED Summary from file ./ca019.skd.auto for experiment CA019 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066Ixxx x x x xxxx xxx xxx xxx I 19 19 4.6 0048-097Ix x x x x xx x x x xx x xI 14 26 6.6 0059+581I x x xx x xx x x xx x x x xx x x xxx x xx xx xI 27 81 16.2 0104-408Ixx x x x x xxx xxxxxx xI 16 20 6.5 0208-512Ix xx x xx xxxx I 10 10 4.1 0229+131I x xx x x x I 6 6 1.1 CTA26 I x x x xxx x x I 9 9 2.2 0454-234Ixxxxx xx xxx xxx xxI 17 17 6.1 0458-020I x x xx x x xxxxx x x x x xxxI 20 20 4.7 0528+134Ixxxxxxxxx xxx xxxxxx xxxxxxxx x x x xxx I 32 63 13.0 0537-441Ixxx xxx x x xxxI 11 11 3.7 0552+398Ix xx xxx xxxxxx xxx xx xxxxxxxxx x x x I 29 62 9.7 0637-752I x x x x x x x x x x I 10 10 4.1 0718+793I x x x x I 4 4 .8 0727-115Ixxxxx xxxxx xx xxx xI 16 20 6.4 0749+540I x x x xx x xx xx x xx xxx xx x xx xxx x I 25 71 14.5 0804+499I x x I 2 4 .8 0823+033I x xx xx xx x x xx xx I 14 16 3.4 OJ287 I x x x xx I 5 5 .7 4C39.25 Ixxx xx x xx x xx x x xxxxx xxxxx xxx xxx I 29 66 9.9 0955+476Ix x x xxxx xxx xx xx x xxxxx xxx x x xxx xx xxI 32 70 15.1 1034-293I x xxxx x xx x x x I 11 13 4.3 1044+719I x x x x x x x x x x x x x x x x x x x x x xI 22 66 13.2 1057-797I x x x x x x x x x I 9 9 3.7 1124-186I xxxx x I 5 7 2.3 1128+385Ixxx x xx x x x xxxxx xxxxxx xxx xxxxxI 28 60 8.0 1144-379I xxxxx xxxx xx I 11 15 4.9 1255-316I x x xx xx I 6 6 2.0 1300+580I x x x x x I 5 5 1.0 1308+326Ix xx xxx x x x x x xx xx xx xxxxxI 23 33 4.4 1334-127I xx xx x x xx x xx I 12 12 2.6 1357+769I x x x x x x x x x x x x xx x x x xI 18 54 10.8 1424-418I x x xxxxxxx xx x I 12 16 5.2 1606+106Ixxx xxxx xxxx xx x x xx xx x x xxxxxxxI 28 32 6.0 1610-771I x x x x x x x x x x I 10 10 4.1 NRAO512 Ix xxxxx xxx xx xx x x x xxxx xxI 23 39 5.5 1739+522Ix xx xx xx xx x xx xx xx x xxx xx xxx xxx xx xxI 32 86 18.0 1741-038Ixxxxxx x x xxx x x x x x xxx xxxx x x x xxI 30 48 11.4 1815-553I x xx I 3 3 1.2 1921-293I xx xxx xxx x xxx xx x x I 16 20 6.8 1954-388I x x xxxxxxx xx x I 12 12 4.0 1958-179I x xxxxxxxxxx xx x xx x I 17 17 6.1 2005-489I I 0 0 .0 2052-474I I 0 0 .0 2145+067Ixxxxx xx xxx x xx x x xxxxxxx xxx x xxx I 31 37 7.6 2234+282I xxx xx x xx I 8 8 1.0 2255-282Ix x x xx xxxx xI 10 16 5.2 Total scans, obs: 729 1234 Average number of obs. per baseline per source (normalized by up-time) = 5.7 Min = .0 Max = 40.5 (Baseline Hh-Ma on 0528+134) RMS = 8.4 Total time: 1442 minutes ( 24.0 hours). Key: Gc=GILCREEK Hh=HARTRAO Ho=HOBART26 Ma=MATERA Wf=WESTFORD Gc Hh Ho Ma Wf Avg % obs. time: 46 37 32 46 50 42 % cal. time: 4 3 2 4 4 3 % slew time: 25 38 30 19 18 26 % idle time: 23 20 34 30 26 27 # of tapes : .8 2.3 2.0 2.7 .8 total # scans: 417 285 216 382 407 341 # scans/hour : 17 11 8 15 16 14.2 Avg scan (sec): 96 114 128 104 106 109 # OF OBSERVATIONS BY BASELINE | Gc Hh Ho Ma Wf StnTotal ---------------------------------- Gc|417 10 45 225 348 432 Hh| 285 166 135 29 422 Ho| 216 21 9 414 Ma| 382 246 895 Wf| 407 305 Number of 2-station scans: 487 Number of 3-station scans: 235 Number of 4-station scans: 7 Number of 5-station scans: 0 Total # of scans, observations: 729 1234 Average baseline components for all observations Average XY = 6039. Average XZ = 5985. Average YZ = 4616. Average length = 7189.