IVS-OHIG65 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2009 Nov. 10/11 doy 314-315 Insitute for Geodesy and Geoinformtion of the University of Bonn, Germany Correlator: Bonn Purpose ======= The purpose of the IVS-OHIG (Southern Terrestrial Reference Frame) sessions is to tie together optimally the sites in the southern hemisphere. 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. Schedule ======== This is a schedule generated with the automatic mode of sked using the variable scan length with a minimum of 60 seconds. The most recent and updated source flux models are included. SNR goals are 20/18 at X-band and 20/18 at S-band for all stations. 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) 75% 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 K5 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: Up to now we record in a new frequency sequence called EUR-T2 with a channel bandwith of 4 Mhz and 16 tracks. See more details in the section irecording mode in this file. RECORDING DATA/MODULES All stations should put so much O'Higgins sessions as possible on one (1) or two (2) module(s). This will help limit the number of modules being held up in the O'Higgins campaign. For Example: one OHIG experiment need ca. 900 Gbyte of data. So on one C or D-size you can record two or three Ohig-experiments. Comments ======== The currently uncooled receiver forced us to change the Ohig SEFD for this session, to achieve reasonable SNR for X and S-band. Session Notes for session: ohig65 Experiment: OHIG65 Description IVS-OHIG65 Scheduler: mueskens Correlator: BONN Start: 2009-314-17:30:00 End: 2009-315-17:30:01 Current yyyyddd: 2009314 (2009.86) ( 15146 MJD, TUES 10NOV.) Greenwich sidereal time: 20:50: 0.00 (17:30: 0 UT) Sun's RA and DEC: 15h 4.0m -17d 19.1 ================================================== There are no observations for Kokee 18:20 U.T. to 19:40 U.T. Kokee will participate in the intensive session during this 1.5 hour period. ================================================== First observations name yyddd-hhmmss Ho Kk Oh Tc Sy 1921-293 09314-173000| 77 410 410| 0537-441 09314-173736| 51 101 101| 0637-752 09314-174004| 117 720 720 | 0607-157 09314-174422| 40 153 153| Last observations 1124-186 09315-165921| 713 720 720 | 1921-293 09315-171314| 82 391 391| 1334-127 09315-172054| 357 536 536 | End of listing. =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 3.0 Min = 0.0 Max = 67.0 (Baseline Kk-Sy on 3C446 ) RMS = 7.7 Total time: 1437 minutes ( 24.0 hours). Key: Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Tc=TIGO Sy=SYOWA Ho Kk Oh Tc Sy Avg % obs. time: 30 24 74 53 57 48 % cal. time: 1 1 2 1 1 1 % slew time: 16 3 12 4 2 8 % idle time: 51 72 11 41 39 43 total # scans: 122 63 141 97 124 109 # scans/hour : 5 3 6 4 5 5 Avg scan (sec): 214 327 453 472 394 371 # data tracks: 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 Total GBytes: 470 370 1150 824 879 739 Total GB(M5): 418 329 1022 732 782 657 Total GBytes (M5) recorded: 3282.9 # OF OBSERVATIONS BY BASELINE | Ho Kk Oh Tc Sy StnTotal ----------------------------------- Ho| 52 87 43 81 263 Kk| 28 32 27 139 Oh| 85 101 301 Tc| 54 214 Sy| 263 Total # of scans, observations: 176 590 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: HOBART26 KOKEE OHIGGINS SYOWA TIGOCONC Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 128.000 Mbits 64.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 16(*2) 32 0.00 X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 80.0 MHz rms spanned bw= 30.2 MHz Effective number of channels recorded per sub-pass X S Total 10.000 6.000 16.000 ===========================================================