IVS-OHIG63 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2009 Feb. 10/11 doy 041-42 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: ohig63 =========================================================== Parameter values for experiment OHIG63 Experiment description: IVS-OHIG63 Scheduler: mueskens Correlator: BONN Nominal start: 2009-041-17:30:00 Nominal end: 2009-042-17:30:01 Current yyyyddd: 2009041 (2009.11) ( 14873 MJD, TUES 10FEB.) Greenwich sidereal time: 2:53: 0.00 (17:30: 0 UT) Sun's RA and DEC: 21h 37.9m -14d 8.3 =========================================================== 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 Observation listing from file ohig63.skd for experiment OHIG63 Source Start DURATIONS name yyddd-hhmmss Ft Ho Kk Oh Tc Sy 0537-441 09041-173000| 195 195 226 226 205| 2052-474 09041-173611| 284 720 720| 1958-179 09041-173635| 276 276 | =========================================================== Last observations 1124-186 09042-165657| 166 556 556| 0208-512 09042-170607| 676 676 | 0727-115 09042-170656| 40 40| 2052-474 09042-171108| 271 720 720| End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.0 Min = 0.0 Max = 57.6 (Baseline Ho-Oh on 1741-038) RMS = 8.3 Total time: 1426 minutes ( 23.8 hours). Key: Ft=FORTLEZA Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Tc=TIGO Sy=SYOWA Ft Ho Kk Oh Tc Sy Avg % obs. time: 55 37 40 61 62 61 53 % cal. time: 1 3 2 1 1 2 2 % slew time: 17 33 9 12 4 3 14 % idle time: 26 26 47 24 32 32 32 total # scans: 104 252 185 127 110 172 158 # scans/hour : 4.4 10.6 7.8 5.3 4.6 7.2 6.7 Avg scan (sec): 450 127 186 413 483 306 326 Total GBytes: 842 575 620 944 956 947 814 Total GB(M5): 748 511 551 839 850 842 723 Total GBytes (M5) recorded: 4340.5 # OF OBSERVATIONS BY BASELINE | Ft Ho Kk Oh Tc Sy StnTotal -------------------------------------- Ft|104 9 44 42 69 33 197 Ho| 252 128 52 16 115 320 Kk| 185 20 40 15 247 Oh| 127 62 88 264 Tc| 110 45 232 Sy| 172 296 Total # of scans, observations: 391 778 =========================================================== 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 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 3) S-band (margin 3) Ft Ho Kk Oh Tc Ft Ho Kk Oh Tc Ho 20 Ho 22 Kk 20 22 Kk 22 22 Oh 20 20 20 Oh 18 18 18 Tc 20 20 20 20 Tc 18 18 18 18 Sy 20 20 20 20 20 Sy 18 18 18 18 18