[IGSREPORT-14782] Wk 1407 MIT T2 RNAAC Analyis Report
Tom Herring
tah at mtglas2.mit.edu
Wed Feb 14 05:20:35 PST 2007
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IGS Electronic Report 14 Feb 05:18:09 PST 2007 Message Number 14782
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Author: Thomas Herring
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MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 1407 Dates: 06dec24 to 06dec30
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MIT (Massachusetts Institute of Technology)
Room 54-820A
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
MIT1407p.SNX RNAAC combination sinex file from all available analysis centers
with the GNAAC sinex files.
MIT1407p.SUM Name of this summary file
0.0 Starting Week 1395, adopted IGS05 for reference frame. The combination
is now minimum constraint.
0.1 Starting Week 1239 we adopted IGb00 reference system (given in
IGS03P33_RS99.snx)
0.2 Starting Week 1016 we starting using ITRF97
0.3 Starting Week 0939 we starting using ITRF96 and its reference site list.
0.4 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) Reference frame is defined translation, rotation to the IGS05
reference frame defined with the following sites:
vesl vill madr sfer rabt asc1 hofn mas1 reyk pdel chpi qaq1 braz
kely stjo ohi2 ohi3 lpgs alrt hlfx cord cro1 unsa sch2 riog thu3
sant wes2 conz nrc1 scub gode usno algo mana glps nlib chur dubo
flin mdo1 amc2 pie1 ispa yell gold holm drao quin will whit thti
mkea hnlc kokb aspa chat mcm4 bili noum mac1 petp tidb hob2 tow2
lae1 guam yssk tskb alic cedu jab1 darw tixi daej pimo karr bjfs
pert yar1 wuhn cas1 ulab irkt kunm coco lhaz nril guao novj hyde
dav1 iisc pol2 dgar kerg kit3 maw1 artu reun sey1 bahr mali trab
syog mdvj ramo polv nico mbar glsv harb hrao mets joze suth tro1
trom bor1 mate not1 pots wtzr onsa nya1 nyal nklg cagl zimm gras
wsrt brus
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 1407
IMPACT OF RNAACs on GNAAC Loose solution
RMS change over 284 stations: 1.20 mm
CENTER RESULTS
For Center GSI VARIANCE FACTOR 1.81
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
AIRA 37.1 1.0 -37.0 1.0 2.1 3.2 Center GSI
KNYA 0.1 1.0 -4.3 1.1 5.5 3.2 Center GSI
MZSW 14.2 1.0 16.4 0.9 17.3 2.5 Center GSI
OKNW -2.5 0.9 3.8 1.0 10.3 2.9 Center GSI
P118 31.1 0.9 -2.0 0.9 11.6 2.7 Center GSI
P124 22.3 0.9 -2.6 1.0 0.6 3.1 Center GSI
TSK2 33.6 0.9 13.3 1.0 26.6 2.6 Center GSI
For Center SIR VARIANCE FACTOR 1
Site dN +- dE +- dU +- Center
(mm) (mm) (mm) (mm) (mm) (mm)
BOGA 5.0 0.7 3.2 0.7 -11.5 1.3 Center SIR
BOMJ 4.2 0.8 18.9 1.0 -17.4 1.6 Center SIR
BUCA 12.3 0.7 11.5 0.7 -5.9 1.4 Center SIR
BUEN 2.8 0.7 4.1 0.7 12.4 1.3 Center SIR
CALI 3.9 0.7 8.7 0.7 20.5 1.3 Center SIR
CAM2 5.7 0.9 -2.6 0.9 7.1 1.7 Center SIR
CART 2.4 0.7 2.4 0.8 3.9 1.4 Center SIR
CFAG 5.2 0.7 3.7 0.7 0.3 1.4 Center SIR
CHET 8.3 0.9 -4.0 0.9 -5.5 1.6 Center SIR
COL2 1.3 1.2 -10.5 1.1 11.3 1.9 Center SIR
CUCU 3.2 0.7 -0.4 0.8 20.9 1.4 Center SIR
CUIB 8.0 0.7 -3.1 0.8 -36.3 1.4 Center SIR
ETCG 13.2 0.8 6.5 0.8 -8.3 1.5 Center SIR
FLOR 3.5 0.7 -1.1 0.8 7.3 1.4 Center SIR
GVAL 1.1 0.8 -1.1 1.0 9.5 1.6 Center SIR
HER2 1.3 1.5 -14.2 1.4 1.9 2.1 Center SIR
IGM1 3.0 0.7 4.8 0.7 11.1 1.5 Center SIR
IMPZ -15.5 0.8 15.1 0.9 201.4 1.5 Center SIR
INEG -14.1 1.2 21.1 1.1 170.8 1.9 Center SIR
LHCL 4.4 0.8 2.1 0.7 3.2 1.5 Center SIR
LPAZ 3.9 1.4 -18.1 1.3 4.5 2.0 Center SIR
MANA -5.2 0.8 -2.9 0.8 -8.7 1.5 Center SIR
MAPA 0.4 0.8 7.2 0.9 5.1 1.5 Center SIR
MARA 50.7 0.7 -21.0 0.8 -31.5 1.4 Center SIR
MCLA 1.4 0.8 -1.5 0.9 -1.3 1.6 Center SIR
MECO 0.3 0.7 0.8 0.7 10.6 1.4 Center SIR
MEDE 12.6 0.7 10.2 0.7 -6.8 1.4 Center SIR
MERI 5.1 0.9 -4.1 0.9 1.0 1.7 Center SIR
MEXI 3.9 1.7 -20.3 1.5 1.3 2.1 Center SIR
MPLA 9.2 0.8 5.2 0.7 -5.9 1.6 Center SIR
MTY2 6.2 1.2 -9.8 1.1 3.4 1.9 Center SIR
MZAC 3.6 0.7 4.1 0.7 3.0 1.4 Center SIR
NAUS 27.2 0.7 2.1 0.8 38.9 1.3 Center SIR
NEIA 2.7 0.8 2.9 0.8 10.5 1.5 Center SIR
NEVA 12.1 0.7 6.0 0.7 -8.0 1.3 Center SIR
OAX2 6.2 1.0 -5.8 1.0 6.4 1.7 Center SIR
PARA 4.0 0.8 -3.8 0.8 -48.9 1.5 Center SIR
PERA 2.7 0.7 3.0 0.7 9.2 1.3 Center SIR
POPA 10.3 0.7 8.0 0.7 -5.5 1.3 Center SIR
PPTE 1.9 0.7 2.4 0.8 3.6 1.4 Center SIR
RECF -5.9 1.0 2.8 1.2 18.7 1.8 Center SIR
RIOD 1.0 0.8 4.5 0.9 9.8 1.6 Center SIR
RIOH 6.3 0.7 4.2 0.8 17.5 1.4 Center SIR
RWSN 3.3 0.8 2.4 0.7 -2.4 1.6 Center SIR
S061 9.0 0.7 23.0 0.7 13.1 1.3 Center SIR
SALV -1.7 0.9 3.0 1.1 14.1 1.7 Center SIR
SAMA 8.8 0.7 6.5 0.8 0.1 1.4 Center SIR
SMAR 3.2 0.7 6.0 0.7 0.2 1.5 Center SIR
TUCU 3.5 0.7 1.1 0.7 4.0 1.4 Center SIR
TUMA 4.2 0.7 7.2 0.7 16.9 1.3 Center SIR
TUNA 2.1 0.7 2.7 0.7 -2.2 1.3 Center SIR
UBER 1.8 0.8 -2.8 0.8 3.6 1.5 Center SIR
UCOR -0.3 0.7 4.6 0.7 -2.1 1.4 Center SIR
UNRO 1.3 0.7 1.4 0.7 2.7 1.5 Center SIR
VALL 4.4 0.7 4.5 0.8 11.9 1.4 Center SIR
VARG -0.7 0.8 -2.0 0.9 -0.7 1.5 Center SIR
VBCA -77.9 0.8 -16.1 0.8 -245.2 1.7 Center SIR
VESL -5.2 1.8 -2.9 1.8 14.4 2.5 Center SIR
VICO 4.9 0.8 21.3 0.9 -14.9 1.6 Center SIR
YOPA 9.7 0.7 8.7 0.7 0.7 1.3 Center SIR
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