IVS-T2097
(International VLBI Service - Terrestical Reference Frame Observations)
2014 Jun.24-25
doy 175-176
Institute for Geodesy and Geoinformation (IGGB)
of the University of Bonn, Germany
Nominal Start Time: 2014:175:17h30 UT
Nominal End Time: 2014:176:17h30 UT
Duration: 24.0 hr
Correlator: HAYS
Participating stations (17):
======================
Ai=AIRA
Bd=BADARY
Cc=CHICHI10
Sm=CRIMEA
13=DSS13
45=DSS45
Ft=FORTLEZA
Kb=KASHIM34
K1=KASHIM11
Km=KUNMING
Kg=KOGANEI
Mh=METSAHOV
Ny=NYALES20
Ts=TSUKUB32
Wf=WESTFORD
Wz=WETTZELL
Zc=ZELENCHK
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 24 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 15 sec. and the most recent
source flux models are included. SNR goals are around 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
Comment
=======
DSS45, DSS13 and Crimea was scheduled in tag-alog mode
Session Notes for session: t2097
===========================================================
Experiment: T2097 Description IVS-T2.097
Scheduler: IGGB/Muesk Correlator: BONN
Start: 2014-175-17:30:00 End: 2014-176-17:30:01
Current yyyyddd: 2014175 (2014.48) ( 16833 MJD, TUES 24JUN.)
===========================================================
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 1.5 hour period.
===========================================================
First observations
Observation listing from file t2097.skd for experiment T2097
Source Start DURATIONS
name yyddd-hhmmss Ai Bd Cc Sm 13 45 Ft Kb K1 Km Kg Mh Ny Ts Wf Wz Zc
1749+096 14175-173000| 638 44 720 39 47 310 40 306 720 124 161 68|
0133+476 14175-173620| 48 41 19 22 131 43 132 91 132 113 |
0642+449 14175-173924| 186 186 178 113 75|
1958-179 14175-174014| 40 22 26 169 39 169 24 |
3C446 14175-174230| 85 85 52 62 73 |
2255-282 14175-174438| 418 418 24 29 318 102 182 165 |
0059+581 14175-174810| 43 93 45 50 60 58 142 72 142 60 31|
===========================================================
Last observations
Source Start DURATIONS
name yyddd-hhmmss Ai Bd Cc Sm 13 45 Ft Kb K1 Km Kg Mh Ny Ts Wf Wz Zc
OJ287 14176-172402| 115 115 82 46|
0420-014 14176-172450| 17 70 70 |
1921-293 14176-172552| 20 21 15 15 21 15 15 |
0454-234 14176-172653| 25 76 76 |
1145+268 14176-172654| 159 159|
0552+398 14176-172702| 52 52 41 |
2227-088 14176-172732| 63 74 93 93 52 |
===========================================================
Average number of obs. per baseline per source(normalized by up-time) = 2.6
Min = 0.0 Max = 720.0 (Baseline Ts-Zc on 0008-264) RMS = 10.2
Total time: 1439 minutes ( 24.0 hours).
Key: Ai=AIRA Bd=BADARY Cc=CHICHI10 Sm=CRIMEA 13=DSS13
45=DSS45 Ft=FORTLEZA Kb=KASHIM34 K1=KASHIM11 Km=KUNMING
Kg=KOGANEI Mh=METSAHOV Ny=NYALES20 Ts=TSUKUB32 Wf=WESTFORD
Wz=WETTZELL Zc=ZELENCHK
Ai Bd Cc Sm 13 45 Ft Kb K1 Km Kg Mh Ny Ts Wf Wz Zc Avg
% obs. time: 58 21 59 13 11 14 53 15 54 25 43 51 37 11 43 34 22 33
% cal. time: 2 4 2 1 2 4 2 4 2 4 3 2 3 2 3 3 3 3
% slew time: 5 46 5 9 23 48 30 42 6 35 8 16 14 8 12 10 45 22
% idle time: 34 29 34 75 62 32 14 38 36 35 45 30 45 78 42 51 29 42
total # scans: 178 305 162 72 184 364 196 336 212 330 261 173 248 194 248 270 302 237
# scans/hour : 7 13 7 3 8 15 8 14 9 14 11 7 10 8 10 11 13 10
Avg scan (sec): 283 59 313 159 53 34 235 39 219 66 142 255 128 47 148 110 62 137
# data tracks: 16 16 16 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 16 16 16
Total TBytes: 0.9 0.3 0.9 0.2 0.2 0.2 0.8 0.2 0.8 0.4 0.7 0.8 0.6 0.2 0.7 0.5 0.3 0.5
Total TB(M5): 0.8 0.3 0.8 0.2 0.2 0.2 0.7 0.2 0.7 0.3 0.6 0.7 0.5 0.1 0.6 0.5 0.3 0.5
# OF OBSERVATIONS BY BASELINE
| Ai Bd Cc Sm 13 45 Ft Kb K1 Km Kg Mh Ny Ts Wf Wz Zc Total
-----------------------------------------------------------------------------------------------
Ai| 79 132 22 26 147 0 138 132 121 134 14 24 82 7 21 33 1112
Bd| 62 37 49 200 9 195 93 227 124 80 143 108 42 116 173 1737
Cc| 18 26 149 0 131 138 98 136 10 16 83 8 11 23 1041
Sm| 10 29 30 27 21 41 22 51 32 15 28 47 62 492
13| 60 82 59 41 28 43 40 75 22 122 72 47 802
45| 1 327 195 227 242 52 89 166 36 65 97 2082
Ft| 0 0 14 0 40 36 1 158 77 50 498
Kb| 182 217 232 50 85 159 34 59 90 1985
K1| 122 202 12 37 101 18 22 36 1352
Km| 154 68 105 140 25 91 155 1833
Kg| 13 48 136 20 30 52 1588
Mh| 103 18 44 130 137 862
Ny| 33 99 153 154 1232
Ts| 9 22 50 1145
Wf| 108 57 815
Wz| 197 1221
Zc| 1413
Total number of scans: 812
Total number of obs: 10605
Total integrated obs-time: 777463
Average obs-time: 73.3
===========================================================
Recording mode
Name Code
EUR2-SX SX
Recording mode setup for:
AIRA BADARY CHICHI10 CRIMEA KASHIM11 KUNMING KOGANEI NYALES20
TSUKUB32 WESTFORD ZELENCHK
Mode Tot.Rate Tot.BandW #BBC #bits Barrel
Mk341:1 128 Mbits 64 MHz 14 1 NONE
Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed
4.00 MHz 1 16(*1) 16 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 1-bit channels recorded per sub-pass
X S Total
10.00 6.00 16.00
Recording mode setup for:
DSS13 DSS45 FORTLEZA KASHIM34 WETTZELL
Mode Tot.Rate Tot.BandW #BBC #bits Barrel
Mk341:2 128 Mbits 64 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 1-bit channels recorded per sub-pass
X S Total
10.00 6.00 16.00
Recording mode setup for:
METSAHOV
Mode Tot.Rate Tot.BandW #BBC #bits Barrel
VLBA1:2 128 Mbits 64 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 1-bit channels recorded per sub-pass
X S Total
10.00 6.00 16.00
===========================================================