[IGSREPORT-3669] Wk 0895 MIT T2 RNAAC Analyis Report
Thomas
Thomas
Thu Apr 24 05:10:15 PDT 1997
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IGS Electronic Report Thu Apr 24 5:10:15 PDT 1997 Message Number 3669
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Author: Thomas Herring
Subject: Wk 0895 MIT T2 RNAAC Analyis Report
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MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 0895 Dates: 97mar02 to 97mar08
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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
MIT0895p.SNX RNAAC combination sinex file from all available analysis centers
with the GNAAC sinex files.
MIT0895p.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 0895
IMPACT OF RNAACs on GNAAC Loose solution
RMS change over 98 stations: 2.05 mm
CENTER RESULTS
For Center AUS VARIANCE FACTOR 51.07
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
ALIC 242.2 3.1 114.6 6.3 29.8 17.1 Center AUS
DST1 239.6 2.4 9.1 3.7 -22.4 9.2 Center AUS
KARR 220.2 2.5 130.2 4.1 9.0 10.5 Center AUS
MAW1 7.4 3.8 57.4 6.8 -231.3 17.4 Center AUS
TOW2 242.4 3.0 115.0 4.5 0.4 12.7 Center AUS
WEL1 261.6 3.5 0.7 6.0 -12.6 14.0 Center AUS
For Center EUR VARIANCE FACTOR 11.94
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
BOGO 2.1 1.4 -1.2 1.4 -21.0 2.2 Center EUR
CAGL 2.8 1.5 -0.9 1.5 3.9 3.4 Center EUR
DELF 8.8 1.4 -14.0 1.4 -13.8 2.3 Center EUR
DENT 7.3 1.4 -16.3 1.4 -11.2 2.6 Center EUR
DOUR 5.8 1.4 -11.6 1.4 -17.6 2.7 Center EUR
EBRE 1.8 1.5 -1.0 1.5 26.1 4.5 Center EUR
HFLK 7.5 1.4 -4.4 1.4 -7.7 2.3 Center EUR
JOEN 6.8 1.4 13.5 1.4 -29.0 4.7 Center EUR
KIR0 11.0 1.4 11.8 1.4 -1.0 4.6 Center EUR
MAR6 10.9 1.4 11.1 1.4 0.3 4.3 Center EUR
MEDI -1.9 1.4 6.4 1.4 -1.3 2.1 Center EUR
MOPI 94.9 1.4 -29.1 1.4 357.2 2.4 Center EUR
OSLO 12.5 1.4 -5.0 1.4 2.6 4.9 Center EUR
PENC 3.9 1.4 2.8 1.4 -14.3 2.3 Center EUR
RIGA 8.0 1.5 13.1 1.4 -6.7 4.8 Center EUR
SODA 10.6 1.5 14.1 1.4 5.3 5.3 Center EUR
STAV 11.8 1.4 0.6 1.3 -11.6 4.0 Center EUR
SVTL 8.2 1.5 13.0 1.5 -10.6 5.1 Center EUR
TRON 13.8 1.4 -2.5 1.3 4.4 4.3 Center EUR
VAAS 10.2 1.4 13.2 1.4 -13.3 4.4 Center EUR
VARD 10.6 1.4 6.9 1.4 -5.0 5.3 Center EUR
VENE 6.0 1.4 -6.4 1.4 -13.3 3.7 Center EUR
VIL0 9.9 1.4 14.1 1.3 -4.9 4.2 Center EUR
VIS0 8.9 1.4 9.9 1.4 -6.5 4.0 Center EUR
WARE 6.5 1.4 -12.5 1.4 -13.7 3.4 Center EUR
WROC 9.8 1.4 0.4 1.4 -5.5 2.4 Center EUR
For Center GIA VARIANCE FACTOR 7.24
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
CLGO -23.8 1.9 14.8 2.8 6.4 6.9 Center GIA
For Center GSI VARIANCE FACTOR 2.2
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
CCJM -3.9 2.0 41.6 3.1 8.1 7.6 Center GSI
KNYA -7.5 2.0 22.5 2.8 12.9 6.4 Center GSI
MZSW 13.8 2.3 -2.9 2.4 -20.8 10.4 Center GSI
OKNW -12.1 2.0 18.3 2.7 -26.2 5.7 Center GSI
STKW 8.4 1.9 4.6 2.2 14.5 5.2 Center GSI
TKBA 12.0 1.9 2.0 2.1 -4.6 5.3 Center GSI
TOHK 5.2 1.9 9.1 2.2 -28.5 6.0 Center GSI
For Center PGC VARIANCE FACTOR 1
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
HOLB 2.6 1.5 5.0 1.7 -15.5 4.7 Center PGC
NANO -2.4 1.4 8.0 1.7 -12.3 3.7 Center PGC
NEAH -2.4 1.4 8.8 1.7 -2.8 4.3 Center PGC
UCLU 2.5 1.4 16.9 1.7 -23.4 4.4 Center PGC
WSLR -6.0 1.4 -9.3 1.7 -11.5 3.5 Center PGC
For Center SIR VARIANCE FACTOR 17.95
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
AREQ 32.9 3.2 -21.7 3.7 -21.9 15.7 Center SIR
EISL 13.7 4.8 -24.3 6.6 6.0 21.7 Center SIR
PARA 33.4 2.2 -8.3 2.5 -13.1 6.4 Center SIR
UEPP 32.7 2.2 -6.3 2.5 -8.5 6.4 Center SIR
[Mailed From: Tom Herring <tah at mtglas.mit.edu>]
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