[IGSREPORT-3704] Wk 0896 MIT T2 RNAAC Analyis Report
Thomas
Thomas
Sun May 4 23:29:57 PDT 1997
******************************************************************************
IGS Electronic Report Sun May 4 23:29:57 PDT 1997 Message Number 3704
******************************************************************************
Author: Thomas Herring
Subject: Wk 0896 MIT T2 RNAAC Analyis Report
********************************************************************************
MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 0896 Dates: 97mar09 to 97mar15
********************************************************************************
MIT (Massachusetts Institute of Technology)
Room 54-618
77 Massachusetts Avenue,
Cambridge, MA 02139
e-mail: tah at mtglas.mit.edu
tel: (617)253-5941 (Tom Herring)
fax: (617)253-1699
PRODUCTS GENERATED:
The following products are generated and uploaded into CDDIS @ NASA/GSFC
MIT0896p.SNX RNAAC combination sinex file from all available analysis centers
with the GNAAC sinex files.
MIT0896p.SUM Name of this summary file
1.0 Analysis Procedures:
(1) Each centers sinex solutions are de-constrained before
combination. When center constraints are available, the
constraints are loosened to +-1 meters.
(2) Covariance matrices from each center are re-scaled based
on the change in chi**2 when the RNAAC's sinex file is
combined with the loose combination of the GNAAC's
sinex files. To generate reasonable sigmas, the scale factor
is set at 0.3 times the chi**2/degree of freedom increment.
(3) The tight solution is generated with the following constraints on
the ITRF94 core sites. In this analysis, the loose g-sinex file
is combined with the RNAAC sinex files. Starting Week 0893 we
stopped using MADR as a core site.
Sig N Sig E Sig U
(m) (m) (m)
TROM 0.004 0.004 0.004
X MADR 0.003 0.003 0.003
KOSG 0.003 0.003 0.005
WETT 0.002 0.002 0.003
HART 0.004 0.004 0.004
ALGO 0.003 0.003 0.003
YELL 0.003 0.003 0.004
GOLD 0.004 0.004 0.005
FAIR 0.003 0.003 0.003
KOKB 0.003 0.003 0.003
SANT 0.004 0.004 0.004
TIDB 0.004 0.004 0.004
YAR1 0.004 0.004 0.005
Earth rotation parameters are estimated for each center (even when not given
in the original SINEX files. In this case the partial derivatives are
computed from the station coordinates).
(4) The summary below gives
(a) The RMS difference between the GNAAC loose analysis and
the GNAAC+RNAAC loose analysis. If this RMS is small then the
RNAAC combination is not effecting the global coordinates solution
significiantly.
(b) For each RNAAC Center we give:
(b.1) the VARIANCE rescaling factors used (determined as
discussed above) and
(b.2) the adjustment to the apriori coordinates
of the sites for each RNAAC which are not included in the GNAAC
analyses. The apriori coordinates are based on the analysis
of the first five weeks of RNAAC sinex files. When an RNAAC
has no unique sites, the adjustments are given for all sites
in the center based on the analysis from that center alone.
SUMMARY OF POSITIONS FOR WEEK 0896
IMPACT OF RNAACs on GNAAC Loose solution
RMS change over 98 stations: 7.29 mm
CENTER RESULTS
For Center AUS VARIANCE FACTOR 42.12
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
DST1 242.5 2.2 100.7 2.5 -10.9 4.2 Center AUS
KARR 221.0 2.2 127.0 2.9 -12.6 6.0 Center AUS
MAW1 14.1 2.9 54.6 3.9 -257.6 9.3 Center AUS
TOW2 238.3 2.4 90.2 3.0 33.0 7.0 Center AUS
WEL1 249.3 2.5 -1.2 3.4 -63.7 6.7 Center AUS
For Center EUR VARIANCE FACTOR 14.78
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
BOGO 7.1 1.4 -3.1 1.4 -15.4 2.3 Center EUR
CAGL 9.6 1.5 -2.5 1.5 0.2 3.2 Center EUR
DELF 12.7 1.4 -15.3 1.4 -6.1 2.6 Center EUR
DENT 11.5 1.4 -18.0 1.4 -3.7 2.5 Center EUR
DOUR 10.6 1.4 -13.3 1.4 -11.9 2.8 Center EUR
EBRE 5.6 1.5 -3.6 1.5 29.8 4.6 Center EUR
HFLK 12.7 1.4 -6.0 1.4 -2.0 2.5 Center EUR
JOEN 10.2 1.5 11.4 1.4 -22.2 5.0 Center EUR
KIR0 11.5 1.4 10.2 1.4 1.8 4.8 Center EUR
MAR6 13.4 1.4 7.4 1.4 5.7 4.6 Center EUR
MEDI 1.6 1.4 4.8 1.4 -6.0 2.3 Center EUR
MOPI 99.7 1.4 -30.3 1.4 373.5 2.5 Center EUR
OSLO 14.0 1.5 -7.6 1.4 -7.4 5.2 Center EUR
PENC 8.6 1.4 1.2 1.4 -9.1 2.5 Center EUR
RIGA 12.7 1.5 9.1 1.4 9.2 5.3 Center EUR
SODA 11.7 1.5 11.1 1.4 6.4 5.9 Center EUR
STAV 15.2 1.4 3.9 1.4 6.5 5.0 Center EUR
SVTL 11.0 1.6 9.6 1.5 -7.0 5.4 Center EUR
TRON 14.8 1.4 0.7 1.4 7.6 4.9 Center EUR
VAAS 11.9 1.4 11.6 1.4 -4.6 4.9 Center EUR
VARD 9.0 1.5 3.8 1.4 -6.5 5.6 Center EUR
VENE 7.7 1.4 -8.2 1.4 -15.4 3.9 Center EUR
VIL0 13.2 1.4 11.0 1.4 1.3 4.5 Center EUR
VIS0 13.7 1.4 6.6 1.4 4.3 4.3 Center EUR
WARE 10.7 1.4 -14.4 1.4 -8.5 3.4 Center EUR
WROC 14.4 1.4 -0.9 1.4 -0.7 2.4 Center EUR
For Center GIA VARIANCE FACTOR 8.06
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
CLGO -21.9 1.7 21.0 2.4 -7.2 5.9 Center GIA
For Center PGC VARIANCE FACTOR 1
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
HOLB 4.3 1.5 8.1 1.7 -14.9 4.7 Center PGC
NANO 1.7 1.4 13.1 1.7 -14.7 3.7 Center PGC
NEAH 1.5 1.4 12.3 1.7 -1.5 4.3 Center PGC
UCLU 6.1 1.4 20.7 1.7 -20.0 4.4 Center PGC
WSLR -3.8 1.4 -3.0 1.7 -5.1 3.4 Center PGC
For Center SIR VARIANCE FACTOR 20.35
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
AREQ 31.6 2.3 -12.4 2.7 -20.7 8.6 Center SIR
LPGS 19.6 3.1 -21.2 3.3 -13.6 16.7 Center SIR
PARA 32.1 2.2 -8.4 2.4 -21.3 6.3 Center SIR
UEPP 33.8 2.1 -5.5 2.4 -12.1 5.9 Center SIR
[Mailed From: Tom Herring <tah at mtglas.mit.edu>]
More information about the IGSREPORT
mailing list