IVS-T2033
(International VLBI Service - Terrestical Reference Frame Observations)
2004 Sept 14/15
doy 258/259
Geodetic Institute of the University of Bonn, Germany
Correlator
==========
see MULTI-AGENCY SCHEDULE 2004
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 SKED ((NRV/JMG 2004May05)
using the EUR-SX band and the EURSX-C-2 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 ) 70% 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 )
Procedures
==========
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.
==========================================================
Parameter values for experiment T2033
Experiment description: IVS-T2.033
Scheduler: BONN/Mueskens
Nominal start: 2004-258-17:30:00 Nominal end: 2004-259-17:30:01
Current yyyyddd: 2004258 (2004.71) ( 13263 MJD, TUES 14SEP.)
Greenwich sidereal time: 17: 6: 6.00 (17:30: 0 UT)
Sun's RA and DEC: 11h 31.5m 3d 5.0
===========================================================
Observation listing from file t2033.skd for experiment T2033
Source Start DURATIONS
name yyddd-hhmmss Yk Sm Ft Gc Ny On Gg Sv Ur Wf Wz
0059+581 04258-173000| 760 760 145 246 760 186 724 370 439|
4C39.25 04258-173000| 579 579 |
OQ208 04258-173942| 183 136 105 205 205|
1622-253 04258-174438| 74 74|
0642+449 04258-174525| 760 426 760 430 760 760 |
===========================================================
Last observations
Source Start DURATIONS
name yyddd-hhmmss Yk Sm Ft Gc Ny On Gg Sv Ur Wf Wz
2136+141 04259-170159| 217 181 298 65 298 230|
0642+449 04259-170701| 164 120 59 164|
1124-186 04259-171031| 546 546 |
0133+476 04259-171111| 501 306 307 560 147 560 305|
0727-115 04259-172026| 135 135 |
0003-066 04259-172223| 80 80 |
===========================================================
Average number of obs. per baseline per source (normalized by up-time) = 2.9
Min = .0 Max = 240.0 (Baseline Yk-Gc on 0727-115) RMS = 7.4
Total time: 1433 minutes ( 23.9 hours).
Key: Yk=ARIES_9M Sm=CRIMEA Ft=FORTLEZA Gc=GILCREEK Ny=NYALES20
On=ONSALA60 Gg=ORION_5M Sv=SVETLOE Ur=URUMQI Wf=WESTFORD
Wz=WETTZELL
Yk Sm Ft Gc Ny On Gg Sv Ur Wf Wz Avg
% obs. time: 56 55 39 48 52 59 13 28 55 61 49 47
% cal. time: 1 1 1 2 2 1 0 2 1 2 2 1
% slew time: 12 23 17 15 13 12 2 39 17 10 8 15
% idle time: 29 18 41 33 31 26 83 29 24 25 39 34
total # scans: 137 156 97 212 218 160 57 247 154 210 228 170
# scans/hour : 5 6 4 8 9 6 2 10 6 8 9 7.1
Avg scan (sec): 355 304 350 196 208 321 197 100 309 251 186 252
Total GBytes: 383 374 267 328 357 405 88 196 375 416 334 321
Total GB(M5): 389 380 271 333 363 411 89 199 381 423 339 326
# of tapes : 3.3 3.1 2.4 .7 .8 .9 .2 1.5 .8 .9 .8
tape change times (hhmm):
0103 0148 0259 0000 0000 0000 0000 0920 0000 0000 0000
0825 0912 1412 0000 0000 0000 0000 0000 0000 0000 0000
1530 1621 0000 0000 0000 0000 0000 0000 0000 0000 0000
Total number of tapes: 15.4 Total GBytes (M5) recorded: 3583.8
# OF OBSERVATIONS BY BASELINE
| Yk Sm Ft Gc Ny On Gg Sv Ur Wf Wz StnTotal
----------------------------------------------------------
Yk|137 21 12 105 65 42 3 50 30 71 38 437
Sm| 156 26 40 65 92 0 99 102 28 114 587
Ft| 97 21 22 32 8 30 11 54 43 259
Gc| 212 140 63 7 108 70 97 84 735
Ny| 218 97 6 171 95 102 131 894
On| 160 5 133 81 58 128 731
Gg| 57 6 0 53 2 90
Sv| 247 108 86 179 970
Ur| 154 42 94 633
Wf| 210 70 661
Wz| 228 883
Number of 2-station scans: 241
Number of 3-station scans: 79
Number of 4-station scans: 61
Number of 5-station scans: 53
Number of 6-station scans: 34
Number of 7-station scans: 20
Number of 8-station scans: 20
Number of 9-station scans: 16
Number of 10-station scans: 0
Number of 11-station scans: 0
Total # of scans, observations: 524 3440
===========================================================
Recording mode
Name Code
EUR-SX SX
Recording mode setup for:
YLOW7296 CRIMEA FORTLEZA SVETLOE
Mode Tot.Rate Tot.BandW #chan #bits Barrel
C 56.000 Mbits 28.000 MHz 14 1 NONE
Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed
2.00 MHz 2 14(*0) 28 135.00
X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz
S-band spanned bw= 85.0 MHz rms spanned bw= 33.0 MHz
Effective number of channels recorded per sub-pass
X S Total
8.000 6.000 14.000
Recording mode setup for:
GILCREEK NYALES20 ONSALA60 GGAO7108 URUMQI WESTFORD WETTZELL
Mode Tot.Rate Tot.BandW #chan #bits Barrel
C 56.000 Mbits 28.000 MHz 14 1 NONE
Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed
2.00 MHz 2 14(*0) 28 80.00
X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz
S-band spanned bw= 85.0 MHz rms spanned bw= 33.0 MHz
Effective number of channels recorded per sub-pass
X S Total
8.000 6.000 14.000
===========================================================
Tape types
ID Station Tape length Speed
ID Station Tape length Speed
Yk YLOW7296 8700feet (Thick ) 33333. (Low ) 12
Sm CRIMEA 8700feet (Thick ) 33333. (Low ) 12
Ft FORTLEZA 8700feet (Thick ) 33333. (Low ) 12
Gc GILCREEK 17400feet (Thin ) 56250. (High) 12
Ny NYALES20 17400feet (Thin ) 56250. (High) 12
On ONSALA60 17400feet (Thin ) 56250. (High) 12
Gg GGAO7108 17400feet (Thin ) 56250. (High) 12
Sv SVETLOE 8700feet (Thick ) 33333. (Low ) 12
Ur URUMQI 17400feet (Thin ) 56250. (High) 12
Wf WESTFORD 17400feet (Thin ) 56250. (High) 12
Wz WETTZELL 17400feet (Thin ) 56250. (High) 12
===========================================================
SNR Targets
Minimum SNR by baseline for multi-baseline scans
X-band (margin 5) S-band (margin 3)
Yk Sm Ft Gc Ny On Gg Sv Ur Wf Yk Sm Ft Gc Ny On Gg Sv Ur Wf
Sm 20 Sm 20
Ft 20 20 Ft 20 20
Gc 20 20 20 Gc 20 20 20
Ny 20 20 20 20 Ny 20 20 20 20
On 20 20 20 20 20 On 20 20 20 20 20
Gg 18 18 18 18 18 18 Gg 18 18 18 18 18 18
Sv 20 20 20 20 20 20 18 Sv 20 20 20 20 20 20 18
Ur 20 20 20 20 20 20 18 20 Ur 20 20 20 20 20 20 18 20
Wf 20 20 20 20 20 20 18 20 20 Wf 20 20 20 20 20 20 18 20 20
Wz 20 20 20 20 20 20 18 20 20 20 Wz 20 20 20 20 20 20 18 20 20 20