[IGSREPORT-10907] Wk 1244 MIT T2 RNAAC Analyis Report
Tom Herring
tah at mtglas2.mit.edu
Wed Dec 31 23:17:53 PST 2003
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IGS Electronic Report 31 Dec 23:16:38 PST 2003 Message Number 10907
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Author: Thomas Herring
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MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 1244 Dates: 03nov09 to 03nov15
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MIT (Massachusetts Institute of Technology)
Room 54-618
77 Massachusetts Avenue,
Cambridge, MA 02139
e-mail: tah at 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
MIT1244p.SNX RNAAC combination sinex file from all available analysis centers
with the GNAAC sinex files.
MIT1244p.SUM Name of this summary file
0.1 Starting Week 1239 we adopted IGb00 reference system (given in
IGS03P33_RS99.snx)
0.1 Starting Week 1016 we starting using ITRF97
0.2 Starting Week 0939 we starting using ITRF96 and its reference site list.
0.3 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 IGb00 core sites. In this analysis, the loose g-sinex file
is combined with the RNAAC sinex files.
Sig N Sig E Sig U
(m) (m) (m)
VESL 0.0058 0.0056 0.0187
VILL 0.0018 0.0016 0.0044
SFER 0.0044 0.0058 0.0146
GOUG 0.0046 0.0053 0.0151
ASC1 0.0024 0.0031 0.0064
HOFN 0.0058 0.0045 0.0193
MAS1 0.0020 0.0018 0.0042
FORT 0.0024 0.0023 0.0049
KELY 0.0248 0.0211 0.0756
STJO 0.0018 0.0014 0.0032
KOUR 0.0025 0.0024 0.0069
OHI2 0.0268 0.0201 0.0724
LPGS 0.0027 0.0026 0.0056
CRO1 0.0024 0.0019 0.0064
UNSA 0.0074 0.0082 0.0324
SCH2 0.0024 0.0021 0.0071
RIOG 0.0038 0.0040 0.0099
THU3 0.0328 0.0281 0.1232
SANT 0.0027 0.0025 0.0046
WES2 0.0020 0.0014 0.0036
NRC1 0.0021 0.0018 0.0047
GODE 0.0021 0.0015 0.0054
ALGO 0.0019 0.0014 0.0029
MANA 0.0103 0.0170 0.0404
NLIB 0.0020 0.0015 0.0042
CHUR 0.0020 0.0015 0.0057
DUBO 0.0025 0.0020 0.0076
FLIN 0.0020 0.0015 0.0054
MDO1 0.0022 0.0017 0.0044
PIE1 0.0022 0.0017 0.0052
EISL 0.0029 0.0031 0.0063
YELL 0.0016 0.0014 0.0033
GOLD 0.0021 0.0016 0.0035
DRAO 0.0019 0.0015 0.0032
FAIR 0.0031 0.0026 0.0099
THTI 0.0044 0.0065 0.0162
MKEA 0.0024 0.0023 0.0057
KOKB 0.0033 0.0042 0.0110
CHAT 0.0023 0.0022 0.0038
AUCK 0.0022 0.0022 0.0042
MCM4 0.0021 0.0023 0.0052
BILI 0.0077 0.0065 0.0244
NOUM 0.0029 0.0033 0.0095
MAC1 0.0021 0.0021 0.0041
PETP 0.0035 0.0031 0.0109
MAG0 0.0027 0.0024 0.0073
TIDB 0.0020 0.0019 0.0035
HOB2 0.0021 0.0020 0.0044
TOW2 0.0035 0.0038 0.0132
GUAM 0.0030 0.0040 0.0112
YSSK 0.0045 0.0038 0.0134
TSKB 0.0018 0.0016 0.0037
ALIC 0.0035 0.0039 0.0161
CEDU 0.0037 0.0036 0.0151
JAB1 0.0050 0.0056 0.0224
DARW 0.0044 0.0056 0.0184
YAKT 0.0149 0.0135 0.0342
TIXI 0.0029 0.0026 0.0100
KARR 0.0036 0.0042 0.0157
PERT 0.0019 0.0019 0.0042
YAR1 0.0019 0.0018 0.0038
CAS1 0.0021 0.0022 0.0049
IRKT 0.0016 0.0015 0.0035
NTUS 0.0026 0.0039 0.0097
COCO 0.0035 0.0050 0.0139
KSTU 0.0023 0.0022 0.0071
LHAS 0.0018 0.0019 0.0047
URUM 0.0040 0.0035 0.0127
DAV1 0.0021 0.0022 0.0056
IISC 0.0021 0.0031 0.0069
POL2 0.0017 0.0018 0.0046
DGAR 0.0022 0.0031 0.0077
KERG 0.0019 0.0023 0.0042
KIT3 0.0016 0.0016 0.0035
MAW1 0.0043 0.0043 0.0154
ARTU 0.0040 0.0034 0.0119
BAHR 0.0018 0.0018 0.0040
MALI 0.0020 0.0031 0.0060
TRAB 0.0130 0.0108 0.0441
SYOG 0.0072 0.0061 0.0260
NICO 0.0023 0.0022 0.0077
RBAY 0.0141 0.0170 0.0623
GLSV 0.0030 0.0025 0.0100
HRAO 0.0025 0.0031 0.0083
JOZE 0.0017 0.0014 0.0050
LAMA 0.0018 0.0014 0.0062
TRO1 0.0030 0.0026 0.0092
BOR1 0.0016 0.0014 0.0040
MATE 0.0017 0.0014 0.0037
GRAZ 0.0017 0.0014 0.0047
POTS 0.0015 0.0013 0.0037
WTZR 0.0015 0.0013 0.0029
ONSA 0.0015 0.0013 0.0031
NYAL 0.0015 0.0017 0.0071
NKLG 0.0054 0.0078 0.0211
ZIMM 0.0018 0.0014 0.0050
GRAS 0.0019 0.0015 0.0057
WSRT 0.0018 0.0015 0.0043
BRUS 0.0016 0.0013 0.0039
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 1244
IMPACT OF RNAACs on GNAAC Loose solution
RMS change over 265 stations: 2.01 mm
CENTER RESULTS
For Center AUS VARIANCE FACTOR 38.82
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
AUST -0.6 0.6 2.5 1.0 7.4 1.8 Center AUS
For Center GSI VARIANCE FACTOR 6.41
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
CCJM 42.4 1.1 -2.1 2.2 15.0 7.6 Center GSI
KNYA 37.1 1.2 1.9 2.4 26.4 8.7 Center GSI
MZSW 32.9 1.1 -3.7 1.1 20.7 7.0 Center GSI
OKNW 36.6 1.2 3.7 3.0 -6.2 9.5 Center GSI
STKW 22.5 1.2 10.8 1.3 -1.4 7.1 Center GSI
TKBA 32.2 1.1 -1.3 1.1 157.3 7.0 Center GSI
TOHK 32.8 1.1 -4.8 1.4 3.7 7.2 Center GSI
For Center SIR VARIANCE FACTOR 15.21
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
ANTC 23.0 0.9 -4.6 0.8 40.6 2.4 Center SIR
BOGA 13.9 0.6 -7.3 0.6 -42.0 1.1 Center SIR
BOMJ -4.2 0.7 12.7 0.7 4.0 1.6 Center SIR
COPO 19.6 0.8 0.0 0.7 57.8 1.4 Center SIR
CRAT 2.6 0.6 -7.5 0.7 -4.6 1.4 Center SIR
CUIB -8.0 0.7 -1.4 0.8 3.6 2.1 Center SIR
IGM0 -19.8 0.8 -27.4 0.7 -44.2 1.6 Center SIR
IGM1 14.9 0.8 -66.4 0.7 91.6 1.5 Center SIR
IMPZ -18.5 1.2 -7.4 1.3 143.5 7.5 Center SIR
IQQE 1.5 0.8 2.7 0.8 30.1 2.2 Center SIR
MARA 14.3 0.6 -18.0 0.7 -16.5 2.5 Center SIR
MPLA 1.4 0.8 -12.2 0.7 -0.8 1.1 Center SIR
PARA -7.6 0.8 -9.1 0.7 -14.1 1.8 Center SIR
POAL 4.1 0.8 -12.8 0.7 3.6 1.8 Center SIR
RECF 5.8 0.6 -12.3 0.7 1.1 1.3 Center SIR
RIOD 5.3 0.8 -5.8 0.7 -0.5 2.0 Center SIR
RWSN 7.2 0.8 -9.9 0.7 4.6 2.0 Center SIR
SALV 4.2 0.7 -12.1 0.7 -4.7 1.9 Center SIR
SMAR 3.6 0.7 -20.1 0.7 20.9 1.4 Center SIR
TGCV 20.3 0.8 17.0 0.8 17.9 2.1 Center SIR
TUCU 19.2 1.0 -7.7 0.9 48.1 3.7 Center SIR
UEPP -10.5 0.7 -2.8 0.7 2.3 1.5 Center SIR
VBCA -45.9 0.8 -25.2 0.7 -125.0 2.0 Center SIR
VICO -9.4 0.7 9.1 0.7 12.9 1.6 Center SIR
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