IVS-OHIG64 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2009 Feb. 11/12 doy 042-43 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: ohig64 =========================================================== Parameter values for experiment OHIG64 Experiment description: IVS-OHIG64 Scheduler: mueskens Correlator: BONN Nominal start: 2009-042-18:00:00 Nominal end: 2009-043-18:00:01 Current yyyyddd: 2009042 (2009.12) ( 14874 MJD, WED. 11FEB.) Greenwich sidereal time: 3:27: 0.00 (18: 0: 0 UT) Sun's RA and DEC: 21h 41.9m -13d 48.1 =========================================================== There are no observations for Kokee from 18:20 U.T. to 19:40 U.T. Kokee will participate in the intensive session during this 1.5 hour period. =========================================================== First observations Observation listing from file ohig64.skd for experiment OHIG64 Source Start DURATIONS name yyddd-hhmmss Ft Ho Kk Oh Tc Sy 0537-441 09042-180000| 207 207 227 227 212| 1741-038 09042-180610| 342 342 | Last observations 0208-512 09043-174050| 720 720| 2052-474 09043-174125| 621 621 | 1606+106 09043-174948| 43 43 | =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 3.9 Min = 0.0 Max = 57.6 (Baseline Ho-Oh on 1741-038) RMS = 8.0 Total time: 1431 minutes ( 23.9 hours). Key: Ft=FORTLEZA Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Tc=TIGO Sy=SYOWA Ft Ho Kk Oh Tc Sy Avg % obs. time: 55 41 45 61 61 63 54 % cal. time: 1 3 2 1 1 2 2 % slew time: 18 33 11 12 5 3 14 % idle time: 24 22 41 24 32 31 30 total # scans: 110 259 202 122 119 164 162 # scans/hour : 4.6 10.9 8.5 5.1 5.0 6.9 6.8 Avg scan (sec): 431 135 190 431 439 328 325 Total GBytes: 854 628 692 947 940 968 838 Total GB(M5): 759 558 615 842 836 861 745 Total Total GBytes (M5) recorded: 4471.3 # OF OBSERVATIONS BY BASELINE | Ft Ho Kk Oh Tc Sy StnTotal -------------------------------------- Ft|110 13 46 37 71 31 198 Ho| 259 139 53 22 110 337 Kk| 202 21 41 16 263 Oh| 122 57 86 254 Tc| 119 44 235 Sy| 164 287 Total # of scans, observations: 404 787 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: FORTLEZA SYOWA 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) 32 135.00 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 Recording mode setup for: HOBART26 OHIGGINS 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 80.00 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 Recording mode setup for: KOKEE TIGOCONC Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 128.000 Mbits 64.000 MHz 14 1 16 Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 16(*2) 32 80.00 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 ===========================================================