IVS-T2061 (International VLBI Service - Terrestical Reference Frame Observations) 2009 Apr. 07-08 doy 097-098 Institute for Geodesy and Geoinformation (IGG) of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2009 (master09.txt) Purpose ======= General the purpose of the IVS-T2 sessions is to monitor the TRF via monthly sessions. Since April 2004 the purpose of the remaining IVS-T2 sessions has been changed by the IVS OPC (Observing Program Committee). The new plan uses larger networks for each T2 session, say 16 to 20 stations, but have fewer T2 sessions during the year. The larger network should provide a stronger solution and better TRF results, even if there are fewer sessions each year. The TRF determine from single session solutions or from a global solution is very important IVS product because this is an essential part for creating the ITRF by corresponding IERS Product Center. A particular strength of VLBI is its contribution to the scale of the ITRF. Usually the TRF is computed from the 24h sessions that are dedicated to observing the EOP. Network ======= The standard configuration of the monthly observed IVS-T2 experiments consists of sixteen and more stations. All stations differ in some extent between all available IVS geodetic network stations from experiment to experiment. Schedule ======== This schedule was generated by the last updated SKED version using the EUR-SX band and the 64-16(EU-T2) EURSX-C-4 frequency setup, depending on which station are available for this observation. Variable scan lengths with a minimum 40 sec. and the most recent source flux models are included. SNR goals are 20 at X-band and S-band depent on different baselines and stations. The predicted SNRs used include a 30 ps noise contribution added in quadrature, which is a typical magnitude for the reweight constants applied in SOLVE solutions. Some important optimization features enabled for this experiment : - the covariance analysis during schedule generation considers the previous 1 hours of observations, - minor SKED optimization parameters . maximum number of observations, . minimum time, 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 - using 63 source for improving the sky covorage (and some new astrometric sources / see $ASTROMETRIC ) COMMENT ======= There are no observations for Wettzell from 18:20 U.T. to 19:40 U.T. Wettzell will participate in the intensive session during this one period. Session Notes for session: t2061.skd Experiment: T2061 Description IVS-T2.061 Scheduler: IGGB/Muesk Correlator: HAYSTACK Start: 2009-097-17:30:00 End: 2009-098-17:30:01 Current yyyyddd: 2009097 (2009.27) ( 14929 MJD, TUES 7APR.) Greenwich sidereal time: 6:34: 0.00 (17:30: 0 UT) Sun's RA and DEC: 1h 6.5m 7d 4.2 =========================================================== First observations Observation listing from file t2061.skd for experiment T2061 Source Start DURATIONS name yyddd-hhmmss Ai Bd Cc 13 6a Ma Mh On Sh Sv Tc Ts Ur Wz 4C39.25 09097-173000| 124 40 155 40 155 69 61 40 40 40 40 40| 1611+343 09097-173451| 720 40 720 53 645 626 152 123 52 304 | 1334-127 09097-174130| 40 40 40 40 | 0235+164 09097-174339| 40 40 181 44 181 83| =========================================================== Last observations 0642+449 09098-172329| 60 145 145 115 40 145 53| 3C418 09098-172351| 64 64 | 0607-157 09098-172518| 40 40| 2121+053 09098-172548| 40 40 | 3C446 09098-172622| 52 52 | 1741-038 09098-172628| 40 40 | =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 4.2 Min = 0.0 Max = 120.0 (Baseline Tc-Ts on 0537-441) RMS = 8.7 Total time: 1437 minutes ( 24.0 hours). Key: Ai=AIRA Bd=BADARY Cc=CHICHI10 13=DSS13 6a=DSS65A Ma=MATERA Mh=METSAHOV On=ONSALA60 Sh=SESHAN25 Sv=SVETLOE Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Wz=WETTZELL Ai Bd Cc 13 6a Ma Mh On Sh Sv Tc Ts Ur Wz Avg % obs. time: 61 19 64 38 17 35 43 38 28 18 41 19 32 26 34 % cal. time: 2 4 2 4 3 2 2 2 4 3 3 4 3 3 3 % slew time: 5 47 5 37 60 17 30 15 33 41 7 16 31 9 26 % idle time: 31 29 28 21 20 45 24 44 34 37 49 60 33 62 37 total # scans: 167 313 149 305 221 190 176 203 331 268 227 345 287 243 244 # scans/hour : 7 13 6 13 9 8 7 8 14 11 9 14 12 10 10 Avg scan (sec): 315 53 373 107 65 161 213 159 73 57 154 48 97 91 140 # data tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Total GBytes: 947 301 999 587 259 550 673 583 436 275 630 300 503 400 532 Total GB(M5): 842 268 888 522 230 489 599 518 387 244 560 266 447 355 473 Total GBytes (M5) recorded: 6615.4 # OF OBSERVATIONS BY BASELINE | Ai Bd Cc 13 6a Ma Mh On Sh Sv Tc Ts Ur Wz StnTotal -------------------------------------------------------------------------------- Ai| 122 144 52 27 49 76 66 155 69 0 157 124 53 1094 Bd| 110 65 97 96 117 121 262 185 0 258 247 146 1826 Cc| 50 25 48 73 63 137 65 1 144 113 50 1023 13| 32 19 42 48 69 57 198 90 52 41 815 6a| 115 76 101 76 142 43 72 86 139 1031 Ma| 112 126 82 136 7 77 100 150 1117 Mh| 155 103 149 3 97 111 125 1239 On| 107 171 4 103 118 150 1333 Sh| 153 0 302 245 125 1816 Sv| 10 152 169 202 1660 Tc| 12 1 11 290 Ts| 224 117 1805 Ur| 137 1727 Wz| 1446 Total # of scans, observations: 757 9111 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 SESHAN25 TSUKUB32 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 0.80 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: BADARY DSS13 DSS65A MATERA ONSALA60 SVETLOE TIGOCONC URUMQI WETTZELL 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 0.80 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: METSAHOV Mode Tot.Rate Tot.BandW #chan #bits Barrel VLBA1:2 128.000 Mbits 64.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 16(*2) 32 0.81 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 ===========================================================