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EUREF LOCAL ANALYSIS CENTRE
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Agency acronym : COD
Institution : Center for Orbit Determination in Europe (CODE)
Mail Address : Astronomical Institute
: University of Berne
: Sidlerstrasse 5
: CH-3012 Berne
Country : Switzerland
E-Mail : code(at)aiub.unibe.ch
Primary Contact
Contact Name : Stefan Schaer
Telephone : +41-31-631-8599 (8591)
Fax : +41-31-631-3869
E-Mail : stefan.schaer(at)aiub.unibe.ch
Secondary Contact
Contact Name : Rolf Dach
Telephone : +41-31-631-8593 (8591)
Fax : +41-31-631-3869
E-Mail : rolf.dach(at)aiub.unibe.ch
Third Contact
Contact Name :
Telephone :
Fax :
E-Mail :
Software Used : Bernese GNSS Software Version 5.3, developed at AIUB
Stat. Included in Analysis :
9-ID start stop network
AJAC00FRA 1048 now EPN
ALME00ESP 1098 now EPN
ANKR00TUR 0848 now IGS
BOGO00POL 0860 now EPN
BOR100POL 0848 now IGS
BRUS00BEL 0848 0924 IGS
CAGL00ITA 0848 now EPN
CASC00PRT 0982 now EPN
DELF00NLD 0924 now EPN
DOUR00BEL 0924 now EPN
EBRE00ESP 0849 now IGS
GLSV00UKR 0955 now IGS
GOPE00CZE 0848 0924 IGS
GRAS00FRA 0848 0924 IGS
GRAZ00AUT 0848 0923 IGS *
HELG00DEU 1036 now EPN
HERS00GBR 0848 0923 IGS
HFLK00AUT 0848 0992 IGS
HOFN00ISL 0931 now IGS
IAVH00MAR 0989 0990 IGS
JOEN00FIN 0924 now EPN
JOZE00POL 0848 0924 IGS
KELY00GRL 0848 now IGS
KIR000SWE 0925 now EPN
KIRU00SWE 0848 now IGS
KOSG00NLD 0848 0915 IGS *
LAMA00POL 0849 now IGS
MADR00ESP 0848 0915 IGS
MAR600SWE 0925 now EPN
MAS100ESP 0848 now IGS
MATE00ITA 0848 0923 IGS *
MDVO00RUS 0848 now IGS
MEDI00ITA 0848 0924 IGS
METS00FIN 0848 0924 IGS
NICO00CYP 0915 0915 IGS
NOTO00ITA 0848 1078 IGS
NOT100ITA 1081 now IGS
NPLD00GBR 1102 now IGS
NSSP00ARM 0986 now IGS
NYA100NOR 0848 now IGS
ONSA00SWE 0848 0923 IGS *
OSLO00NOR 0925 1021 EPN
PDEL00PRT 1101 now EPN
PENC00HUN 0848 now IGS
POTS00DEU 0848 0923 IGS *
PTBB00DEU 1057 now EPN
RABT00MAR IGS *
RAMO00ISR 0982 now IGS
REYK00ISL 0848 now IGS
SFER00ESP 0849 0932 IGS
SJDV00FRA 0969 0986 EPN
SODA00FIN 0924 now EPN
STAV00NOR 0925 1021 EPN
TERS00NLD 1015 now EPN
THU100GRL 0848 now EPN
TOUL00FRA 0915 0986 IGS
TRO100NOR 0848 now IGS
TRON00NOR 0925 1021 EPN
UPAD00ITA 0863 0924 IGS
VAAS00FIN 0924 now EPN
VARD00NOR 0925 1021 EPN
VIL000SWE 0925 now EPN
VILL00ESP 0848 now IGS
WETT00DEU 0848 0882 EPN
WTZR00DEU 0848 0923 IGS *
ZECK00RUS 0927 now IGS
ZIMJ00CHE IGEX *
ZIMM00CHE 0848 now IGS
ZWEN00RUS 0848 1057 IGS
ZWEN00RUS 1141 now IGS
Note that stations indicated with * are
considered in our EUREF data analysis, but not
included in our SINEX result files.
EUREF solutions generated : COEwwww7.SNX Solution for 1 week for GPS week 'wwww' in SINEX format
for GPS week 'wwww' COEwwww7.SUM Processing summary file for 1 week
COEwwwwn.TRO Daily troposphere SINEX (based on weekly COEwwww7.SNX)
COEwwwwn.SNX Daily SINEX results
EUREF solutions sent to : BKG
Report generated : 09-May-2000
Report updated : 09-Oct-2000
15-Oct-2001
03-Jan-2002
02-Jun-2014
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MEASUREMENT MODELS
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Preprocessing : Carrier phase preprocessing is accomplished in a baseline-
by-baseline mode using triple differences. Looking
simultaneously at different linear combinations of L1 and
L2, cycle slips are fixed in most cases. If a cycle slip
cannot be fixed reliably, bad data points are removed or
new ambiguity parameters are set up. In addition, a data
screening step on the basis of weighted postfit residuals
is performed. Outliers are removed for the final
processing.
Basic observable : GNSS carrier phase. GPS code measurements are used for
receiver clock synchronization. The elevation mask angle
is 3 degrees. An elevation-dependent weighting scheme is
used (COSZ). The data sampling rate is 30 and 180 seconds,
respectively.
Modelled : Ionosphere-free linear combination of double-difference
observable carrier phase.
Ground antenna : IGS08/EPNC model (updates).
phase center
calibrations
Satellite antenna: IGS08 model (updates).
phase center
calibrations
Troposphere : ECMWF-based hydrostatic delay mapped with hydrostatic
VMF1. Coefficients from 6-hourly global grids.
Wet VMF1 used for estimation. Gradient model according to
Chen-Herring (CHENHER).
Ionosphere : First-order ionosphere delays eliminated by forming the
ionosphere-free linear combination of L1 and L2.
Higher-order ionosphere (HOI) corrections are applied.
Regional ionosphere maps are generated in order to increase
the number of resolved ambiguities in the QIF, the L5/L3
and the L1/L2 ambiguity resolution.
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ESTIMATED PARAMETERS (APRIORI VALUES & SIGMAS)
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Adjustment : Weighted least-squares adjustment. Mathematical
correlation within the entire subnetwork are correctly
modeled. The elevation-dependent observation weighting
model adopted assumes a zero-difference observation sigma
being proportional to 1/cos(z), where z denotes the
satellite zenith distance angle.
Rejection Criter.: Daily RINEX observation files containing less than
50 percent of possible observation epochs are ignored. The
threshold value concerning data screening is 2.5 mm,
specifically for a normalized, or L1 zero-difference zenith
residual. Baseline data exceeding the overall sigma level
of 5 millimeters is excluded as whole.
Station : Minimum constraint solution aligned to current ITRF using
coordinates an automatic fiducial station selection scheme.
NEQ SINEX results are generated (containing minimum
constained solution).
Troposphere : Zenith path delay parameters are solved for at 1-hour
intervals for each station. At the end of each week, the 7
daily sets of troposphere estimates are re-computed on the
normal equation level by substituting the 7-day combined
station coordinate results.
Ionospheric : Regional TEC maps are derived from the geometry-free linear
combination of double differences. The ambiguity-free maps
are used to improve the QIF ambiguity resolution. The
ambiguity-fixed TEC maps are made available in IONEX
format.
Ambiguity : Ambiguities are resolved in a baseline-by-baseline
mode performing the following steps:
. Melbourne-Wuebbena approach (<6000 km)
. Quasi-Ionosphere-Free (QIF) approach (<2000 km)
(also for GLONASS, same frequencies)
. Phase-based widelane/narrowlane method (<200 km)
(also for GLONASS, no restrictions)
. Direct L1/L2 method, also for GLONASS (<20 km)
(also for GLONASS, no restrictions)
GLONASS is considered for ambiguity resolution (<2000 km).
Regional ionosphere map information is used
to support the code-less methods.
Satellite clock : Satellite clock corrections are not estimated but
bias eliminated by forming double differences.
Receiver clock : Receiver clock corrections are estimated as part of the
bias preprocessing using code measurements. They are finally
eliminated by forming double differences.
Orbits and ERPs : CODE final GNSS orbit and ERP information is adopted.
Tidal : Solid earth tidal displacements are modeled according to
displacements IERS 2010 conventions. Ocean loading corrections are
computed based on Scherneck's amplitudes and phases. No
atmospheric loading corrections are taken into account.
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