CORE-OHIG11 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2000 Feb. 07 Notes prepared by Arno Mueskens Geodetic Institute of the University of Bonn, Germany Schedule name: cohg12.skd on CDDISA Nominal Start: 14:00 U.T. on Feb. 07 (day 038) name yyddd-hhmmss Ft Hh Ho Kk Oh 1741-038 00038-140001| 140 90 140| 0528+134 00038-140011| 90 90 | Duration: 24 hours Nominal Stop: 14:00 U.T. on Feb. 08 (day 039) name yyddd-hhmmss Ft Hh Ho Kk Oh 1057-797 00039-135005| 260 260| NRAO512 00039-135526| 280 280 | 0454-234 00039-135953| 90 90 | Correlator: Bonn Purpose ======= The purpose of the CORE-OHIG (Southern Terrestrial Reference Frame) sessions is to tie together optimally the sites in the southern hemisphere. The participating sites include all the sites in the south - O'Higgins, Fortaleza, Hartebeesthoek, and Hobart - as well as Kokee Park. The last site is the southern-most of the northern sites and have been included to make the geometry more robust and to increase the number of observations per scan. Because these sessions concentrate on the southern sites and do not use observing time to accurately tie these sites to far northern sites (as the Global Sessions do) they should yield a very accurate regional TRF around the South Pole. The characteristics of this network have changed slightly due to more weigh of the southern part. Schedule ======== This is a new schedule generated with the automatic mode of sked using the variable scan length with a minimum of 70 seconds. The most recent and updated source flux models are included. SNR goals are 20(15) at X-band and 15(10) at S-band for all stations. Due to the uncertain participation of Syowa at this time this station was scheduled in the tag along mode. The predicted SNRs used include a 30 ps noise contribution added in quadrature, which is a typical size for the reweight constants size for the reweight constants required in SOLVE solutions. This schedule was optimized by different features: - the covariance analysis during schedule generation considers the previous 2 hours of observations, - minor SKED optimization parameters . maximum number of observations, were optimized over the best ( in a covariance sense ) 65% of the possible observations, this produces a somewhat more even sky distribution, - observations were weighted by their expected SNRs, - 30 ps noise contribution added, - mimimum time between observations of the same radio source was set to 20 min - use of CvgONLY in order to improve the geometry of observation This schedule was made using 60 sources which helped improve the sky coverage. Procedures ========== Please generate the procedures for this session using drudg. Except of Syowa station who have to prepare K4 setup procedures with the existing skd file. NO PREPASS TIME: There is no time allowed in the schedule for prepassing tapes. Therefore all tapes needed for this experiment must be pre-checked before the start of this experiment. FREQUENCY SEQUENCE: The NEOS-wideband RF band frequency sequence ------------------ is used for this experiment. THIS SCHEDULE HAS NONE SECOND EARLY TAPE START ---------------------------------------------- THIN TAPE STATIONS (56kbpi): KOKEE, HARTRAO THICK TAPE STATIONS(33kbpi): HOBART, OHIGGINS, FORTLEZA Summary ======= SKED Summary from file cohg11.skd for experiment COHG11 (all scans with at least one subnet station) SOURCE |0 6 12 18 | 0003-066I x x x x x xx I 7 7 1.6 0048-097Ix x xxx xx x x x x x x x x x xI 17 19 4.2 0104-408I x x x x I 4 10 1.9 0119+115I x x x I 3 3 .7 0119+041I x xx x I 4 4 1.0 0208-512I x x xx xx x I 7 7 .8 0229+131I x xxx x xx x I 8 8 2.1 CTA26 I x xxxxx xxxx x x x xx x x I 17 19 4.3 0402-362I x xxxx x x x xx I 10 10 2.0 0454-234I x x xxx x xxx xxx xxxx x x xx x I 21 44 8.7 0458-020I x x I 2 2 .5 0528+134Ix xx xxx x xxxx x x xx xxxx xxx I 22 22 5.2 0537-441I x x x I 3 3 .6 0552+398I x x xxx xx I 7 7 2.0 0637-752I x x x x I 4 6 .9 0727-115Ixx x x xxx xx xxx xx xxxxxxxx xxx xxx x xx I 33 61 13.1 0749+540I x x I 2 2 .9 0804+499I x x I 2 2 .9 0823+033Ix x xx x xx x xI 9 9 1.9 OJ287 Ix x x x xxxx xxxx x x xx xxxI 19 19 4.9 4C39.25 Ix x xxxx xx xxx xI 12 12 3.3 1034-293I x x x xx xxxx xx x xx x I 16 16 2.7 1057-797I x x x I 3 3 .3 1124-186I xx xx x x x xxx x x x x xxI 16 18 3.6 1144-379I x xx xx x x xxx xx xx x x I 16 16 2.7 1308+326I x xx xx xx I 7 7 3.2 1334-127I x x x xx xxx xx xx I 12 12 2.6 1351-018I x xx xxxx xxx I 10 10 2.4 1357+769I x x x I 3 3 2.2 1424-418I x x x x xx x xxx x x xx xxx xx I 19 19 3.1 1606+106I x xxxxxxxx xxxx I 13 13 3.2 1610-771I x x x x x I 5 9 1.5 1622-253Ix xxx x xxx xx x x x xx xxxxxx xxxx I 25 25 4.6 NRAO512 I xx x xx xx xxx x I 11 11 3.1 1741-038Ix x xx x xx xxxxxx xxxx xxxxx xxxxxxxxx I 32 60 13.1 1749+096I x x x xxxxx x xxx xx x xx x I 18 30 6.5 1815-553I x x x I 3 3 .4 1921-293Ixxx xxxxx xx x xxx xx xxx xxxx xxxxx I 28 50 9.5 1954-388Ixx xx xxx x x x x x x xxx xxx I 19 33 5.8 1958-179Ixxx x xxx xx xx x xx xx xx x xI 22 30 5.9 2121+053Ix xxx xxx xxx xI 11 11 2.6 2145+067I xx x x xx x xI 8 12 2.7 2255-282I xx xx x x x I 7 7 1.5 Total scans, obs: 517 674 Average number of obs. per baseline per source (normalized by up-time) = 2.6 Min = .0 Max = 33.8 (Baseline Ft-Oh on 1741-038) RMS = 6.0 Total time: 1441 minutes ( 24.0 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Ft Hh Ho Kk Oh Avg % obs. time: 51 42 48 48 34 45 % cal. time: 2 2 3 3 1 2 % slew time: 30 39 36 11 9 25 % idle time: 15 15 11 37 54 26 # of tapes : 2.8 .6 2.5 .7 2.0 total # scans: 205 206 305 281 115 222 # scans/hour : 8 8 12 11 4 9.3 Avg scan (sec): 217 178 138 148 261 188 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Oh StnTotal ---------------------------------- Ft|205 151 2 40 60 253 Hh| 206 50 0 55 256 Ho| 305 239 47 338 Kk| 281 30 309 Oh| 115 192 Number of 2-station scans: 440 Number of 3-station scans: 76 Number of 4-station scans: 1 Number of 5-station scans: 0 Total # of scans, observations: 517 674 Average baseline components for all observations Average XY = 6215. Average XZ = 6128. Average YZ = 6473. Average length = 8015.