[IGSREPORT-4555] Wk 0936 MIT T2 RNAAC Analyis Report
Thomas
Thomas
Mon Feb 2 11:05:30 PST 1998
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IGS Electronic Report Mon Feb 2 11:05:30 PST 1998 Message Number 4555
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Author: Thomas Herring
Subject: Wk 0936 MIT T2 RNAAC Analyis Report
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MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 0936 Dates: 97dec14 to 97dec20
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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
MIT0936p.SNX RNAAC combination sinex file from all available analysis centers
with the GNAAC sinex files.
MIT0936p.SUM Name of this summary file
0.0 Starting Week 0901 we started using a new apriori file not Non-ITRF94 coordinates
based on the analysis of week 0822-0900 sinex files. This change will
effect the corrdinate corrections given in this summary.
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 0936
IMPACT OF RNAACs on GNAAC Loose solution
RMS change over 109 stations: .90 mm
CENTER RESULTS
For Center EUR VARIANCE FACTOR 1
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
BOGO 8.9 1.6 5.9 1.5 -7.2 4.6 Center EUR
CAGL 3.6 1.7 7.3 1.6 -32.8 5.4 Center EUR
DELF 6.6 1.5 0.2 1.4 -9.4 4.4 Center EUR
DENT 3.1 1.6 -4.1 1.5 -22.4 5.8 Center EUR
DOUR 4.1 1.5 -1.3 1.4 -12.4 4.7 Center EUR
EBRE -11.7 1.6 8.5 1.6 -42.2 4.9 Center EUR
HFLK 2.8 1.9 6.5 1.7 -26.6 8.2 Center EUR
JOEN 5.9 1.5 22.0 1.4 -54.5 4.5 Center EUR
KIR0 15.7 1.8 -0.1 1.6 -93.0 9.1 Center EUR
MAR6 3.6 1.5 21.6 1.4 -12.0 4.5 Center EUR
MEDI 25.5 1.6 -7.0 1.6 -31.1 5.1 Center EUR
MOPI 16.9 1.6 11.5 1.5 133.6 4.8 Center EUR
NOTO -1.8 1.7 4.7 1.7 -55.3 5.5 Center EUR
PENC 8.0 1.6 5.2 1.5 -10.6 4.7 Center EUR
PFAN -50.4 1.6 -76.1 1.5 -13.7 5.4 Center EUR
RIGA -1.1 1.6 26.3 1.5 19.0 5.3 Center EUR
SFER -0.5 3.7 5.8 3.5 -28.7 60.8 Center EUR
SODA -33.6 1.6 -38.7 1.5 -73.1 6.5 Center EUR
SOFI 3.0 1.6 9.7 1.6 -30.5 4.6 Center EUR
SVTL -3.9 1.7 22.7 1.7 -15.3 5.7 Center EUR
TOUL 8.1 1.6 0.3 1.5 10.2 4.9 Center EUR
VAAS 3.9 1.5 31.1 1.4 7.5 4.7 Center EUR
VENE -4.0 1.7 12.8 1.6 -45.3 5.7 Center EUR
VIL0 1.1 1.4 31.3 1.4 -38.8 4.3 Center EUR
VIS0 -2.9 1.5 18.5 1.4 -22.2 4.3 Center EUR
WARE 6.7 1.7 0.4 1.5 -13.1 5.9 Center EUR
WROC 7.8 1.5 9.8 1.5 -19.6 4.5 Center EUR
ZECK 4.3 2.3 7.8 2.2 -33.1 9.7 Center EUR
For Center GIA VARIANCE FACTOR 3.35
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
No uniques sites for center GIA
Giving coordinate adjustments for all sites
REYK -58.9 9.7 27.0 6.8 -79.6 14.9 Center GIA
KELY -34.6 5.8 37.8 6.4 -96.1 16.6 Center GIA
STJO -66.3 11.4 32.3 5.8 -75.9 14.0 Center GIA
THU1 -9.6 1.8 31.4 5.3 -123.5 17.4 Center GIA
ALGO -51.4 10.0 20.9 4.1 -86.3 14.7 Center GIA
CHUR -31.3 5.1 2.0 2.8 -84.6 16.5 Center GIA
FLIN -39.1 6.2 7.9 2.2 -78.7 16.0 Center GIA
YELL -21.4 3.4 -0.2 1.8 -104.1 16.6 Center GIA
DRAO -40.4 7.6 -3.8 2.1 -77.9 14.8 Center GIA
ALBH -43.2 7.9 -6.0 2.3 -81.9 14.5 Center GIA
WHIT -16.7 4.2 -2.1 2.8 -86.8 15.7 Center GIA
FAIR -16.9 3.3 -23.9 3.8 -90.9 15.8 Center GIA
TSKB -94.6 15.9 -30.4 6.0 -25.2 9.0 Center GIA
USUD -96.3 16.0 -20.9 6.0 -63.5 9.0 Center GIA
IRKT -96.7 15.9 -27.2 4.3 -64.9 11.2 Center GIA
For Center GSI VARIANCE FACTOR 8.66
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
CCJM 9.5 2.1 -1.3 4.0 -36.5 11.5 Center GSI
KNYA 0.5 2.1 6.6 3.9 -80.8 11.1 Center GSI
MZSW 0.7 2.1 18.2 2.5 -14.1 10.6 Center GSI
OKNW -5.0 2.2 21.5 4.1 -38.6 11.6 Center GSI
STKW 5.8 2.2 21.5 2.6 -89.8 10.8 Center GSI
TKBA -3.9 2.0 14.2 2.2 -28.3 10.4 Center GSI
TOHK 5.9 2.1 15.2 2.9 -13.3 10.7 Center GSI
For Center PGC VARIANCE FACTOR 1
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
HOLB -7.8 1.4 -11.7 1.8 -55.5 4.2 Center PGC
NANO -9.4 1.3 -8.9 1.7 2.9 3.3 Center PGC
NEAH -1.9 1.4 -17.4 1.8 10.0 3.9 Center PGC
UCLU -7.2 1.4 -11.3 1.7 -6.8 3.9 Center PGC
WSLR 7.2 1.3 -10.2 1.7 32.4 3.2 Center PGC
For Center SIR VARIANCE FACTOR 30.81
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
BOMJ 37.1 2.0 -28.5 2.4 -71.4 8.1 Center SIR
CUIB 38.1 1.9 -13.7 2.2 33.1 6.4 Center SIR
MANA 44.4 1.9 -22.6 2.4 -0.1 7.7 Center SIR
PARA 4.7 2.0 -17.1 2.3 -9.9 6.6 Center SIR
UEPP 3.7 2.0 -16.2 2.3 -9.4 6.5 Center SIR
VICO 34.4 2.0 -31.5 2.4 -82.3 6.7 Center SIR
[Mailed From: Tom Herring <tah at mtglas.mit.edu>]
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