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EUREF LOCAL ANALYSIS CENTRE
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Agency acronym : NKG
Institution : Nordic Geodetic Commission
Mail Address : Lantmäteriet, the Swedish mapping, cadastral and
: land registration authority
: SE-801 82 Gävle
Country : Sweden
Primary Contact
Contact Name : Tina Kempe
Telephone : +46 26 633856
Fax : +46 26 610676
E-Mail : christina.kempe@lm.se
Secondary Contact
Contact Name : Lotti Jivall
Telephone : +46 26 633740
Fax : +46 26 610676
E-Mail : lotti.jivall@lm.se
Third Contact
Contact Name : Jan Johansson
Telephone : +46 31 772 5558
Fax : +46 31 772 5590
E-Mail : jan.johansson@chalmers.se
Software Used : Bernese GPS Software Version 4.2 - GPS week -1320
: Bernese GPS Software Version 5.0 - GPS week 1321-1764
: Bernese GPS Software Version 5.2 - GPS week 1765-
Stat. Included in Analysis :
9-ID start stop network
ARGI00FRO 1625 now EUR
ARJ600SWE 1798 now EUR
BRUS00BEL 0886 1675 IGS
BRUX00BEL 1679 now IGS
BUDD00DNK 2161 now EUR
BUDP00DNK 1202 now EUR
CASB00IRL 1820 2082 EUR
DRES00DEU 1034 1913 EUR
FINS00FIN 1941 now EUR
HAS600SWE 1812 now EUR
HEL200DEU 1910 now EUR
HERS00GBR 0886 now IGS
HETT00FIN 2021 now EUR
HOBU00DEU 1066 now EUR
HOER00DEU 1243 1329 EUR
HOE200DEU 1335 1762 EUR
HOFN00ISL 0932 now IGS
INVR00GBR 1528 now EUR
IRBE00LVA 1893 now EUR
JOEN00FIN 0886 now EUR
JOE200FIN 1941 now EUR
JON600SWE 1798 now EUR
JOZE00POL 0886 now IGS
KAD600SWE 1812 now EUR
KELY00GRL 0886 2003 IGS
KEV200FIN 1943 now EUR
KILP00FIN 1943 now EUR
KIR000SWE 0886 now IGS
KIR800SWE 1882 now IGS
KIV200FIN 1943 now EUR
KLOP00DEU 1034 now EUR
KURE00EST 1477 now EUR
KUU200FIN 2021 now EUR
LEK600SWE 1812 now EUR
LERI00GBR 1936 now EUR
LIDA00BLR 2131 now EUR
LOV600SWE 1812 now EUR
MAR600SWE 0886 now IGS
MAR700SWE 1882 now IGS
METG00FIN 2001 now IGS
METS00FIN 0886 now IGS
MET300FIN 1941 now IGS
MIK300FIN 2007 now EUR
MNKW00BLR 2101 now EUR
MNSK00BLR 2118 now EUR
NABG00NOR 2158 now IGS
NOR700SWE 1798 now EUR
NOVP00BLR 2101 now EUR
NYA100NOR 0954 now IGS
NYA200NOR 2012 now IGS
NYAL00NOR 0886 0952 IGS
NYAL00NOR 2224 now IGS
OLK200FIN 2007 now EUR
ONSA00SWE 0886 now IGS
ONS100SWE 1882 now IGS
ORIV00FIN 2025 now EUR
OSK600SWE 1798 now EUR
OSLO00NOR 0886 0961 EUR
OSLS00NOR 1090 now EUR
OST600SWE 1812 now EUR
OUL200FIN 1941 now EUR
OVE600SWE 1798 now EUR
POTS00DEU 0886 now IGS
PPSH00NOR 2199 now EUR
PSTV00BLR 2131 now EUR
PTBB00DEU 1059 now IGS
PULK00RUS 1480 now EUR
PYHA00FIN 2025 now EUR
QAQ100GRL 1183 now IGS
RANT00DEU 1846 now EUR
REDZ00POL 1483 now EUR
REYK00ISL 0886 now IGS
RIGA00LVA 0886 now IGS
ROM200FIN 1943 now EUR
SASS00DEU 1235 2042 IGS
SAS200DEU 1914 now EUR
SAVU00FIN 2025 now EUR
SCOR00GRL 1645 now IGS
SKE000SWE 1238 now EUR
SKE800SWE 1812 now EUR
SMI200DNK 2164 2222 EUR
SMID00DNK 1225 2222 EUR
SODA00FIN 0886 now EUR
SOD300FIN 1943 now IGS
SPT000SWE 1174 now IGS
SPT700SWE 2216 now EUR
STAS00NOR 1090 now EUR
STAV00NOR 0886 0961 EUR
SUL500DNK 2161 now EUR
SULD00DNK 1225 now EUR
SUN600SWE 1845 now EUR
SUR400EST 1673 now EUR
SUUR00EST 1395 1654 EUR
SVE600SWE 1798 now EUR
SVTL00RUS 0886 now IGS
SWKI00POL 1483 now EUR
THU100GRL 0848 1200 IGS
THU300GRL 1201 2037 IGS
TOIL00EST 1477 now EUR
TOR200EST 1673 2225 EUR
TORA00EST 1477 1646 EUR
TORN00FIN 2025 now EUR
TRDS00NOR 1090 now EUR
TRO100NOR 0954 now IGS
TROM00NOR 0886 0955 IGS
TRON00NOR 0886 0961 EUR
TUO200FIN 2025 now EUR
UME600SWE 1798 now EUR
VAA200FIN 1943 now EUR
VAAS00FIN 0886 now EUR
VAE600SWE 1798 now EUR
VARD00NOR 0886 0961 EUR
VARS00NOR 1090 now EUR
VIL000SWE 0886 now EUR
VIL600SWE 1798 now EUR
VIR200FIN 1941 now EUR
VIS000SWE 0886 now IGS
VIS600SWE 1798 now EUR
VLNS00LTU 1187 now EUR
WARN00DEU 1242 now IGS
WRLG00DEU 1914 now EUR
WSRT00NLD 0924 now IGS
WTZR00DEU 0886 now IGS
YEBE00ESP 1085 now IGS
EUREF solutions generated : NKGwwww7.SUM Weekly processing summary file
for GPS week 'wwww' NKGwwww7.SNX Weekly coordinate solution in
SINEX format
NKGwwwwn.SUM Daily processing summary file,
for weekdays "n" (0-6)
NKGwwwwn.SNX Daily coordinate solution in
SINEX format
NKGwwwwn.TRO Daily troposphere results in
tropospheric SINEX format
NKGwwwwnr.SNX Daily rapid coordinate solution
in SINEX format
EUREF solutions sent to : BKG
Report generated : 28/05/2001
Report updated : 28/05/2001
21/10/2001
10/10/2002
08/06/2005
01/12/2006
24/03/2011
11/05/2011
29/08/2011
25/01/2012
15/06/2012 --> BRUS removed and BRUX added
25/10/2012 --> IGB08 introduced, change of
fiducial stations
24/04/2013 --> SASS removed from list of
fiducial stations
--> BRUS removed from list of
fiducial stations (correction GW 1676-)
28/05/2013 --> REYK removed from list of
fiducial stations (from GW 1739)
25/10/2013 --> Fourth contact removed
07/11/2013 --> HOE2 removed
29/11/2013 --> Bernese V 5.2, GPS/GLO,VMF,HOI,ATL
12/08/2014 --> 10 Swedish EPN stations added GPS week 1798
22/09/2014 --> HOFN removed from list of
fiducial stations (from GW 1810)
--> JOZE removed from list of
fiducial stations (correction GW 1782-)
10/10/2014 --> 6 Swedish EPN stations added GW 1812
08/12/2014 --> CASB added
25/05/2015 --> SUN6 added GW 1845
27/05/2015 --> RANT added GW 1846
29/03/2016 --> KIR8, MAR7 and ONS1 added GW 1882
13/06/2016 --> IRBE added GW 1893
06/09/2016 --> HEL2 added GW 1910
29/09/2016 --> SAS2, WRLG added GW 1914. DRES removed
after GW 1913.
27/02/2017 --> IGS14 introduced, change of fiducial
stations.
LERI added GW 1936.
12/04/2017 --> 5 Finnish stations added GW 1941
6 Finnish stations added GW 1943
25/05/2018 --> METG added GW 2001. KIV2 added to AC file
(added in analysis already GW 1943)
08/06/2018 --> KELY removed after GW 2003
06/07/2018 --> MIK3 and OLK2 added GW 2007
12/19/2018 --> HETT, KUU2 and NYA2 added GW 2021.
21/03/2019 --> SASS removed after GW 2042.
Galileo included in the solutions from
GW 2044 on.
26/04/2019 --> ORIV, PYHA, SAVU, TORN, TUO2 added to AC file
(added in analysis already GW 2025).
Station 9-ID KUUS00FIN corrected --> KUU200FIN.
29/10/2019 --> Contact information updated.
EUREF solution list updated with rapid daily
solutions.
THU3 removed from list of processed stations.
(decommissioned GPS week 2037), as well as
from list of datum definition stations.
WL/NL and L5/L3 strategies used since
GPS week 2074.
Orbit and ERP information updated.
20/12/2019 --> CASB removed after GW 2082.
Orbit and ERP information updated.
12/02/2020 --> Ambiguous orbit information corrected.
23/04/2020 --> MNKW and NOVP added GW 2101.
28/05/2020 --> IGB14 introduced, change of fiducial stations
17/11/2020 --> LIDA and PSTV added GW 2131.
24/05/2021 --> NABG added GW 2157.
BUDD and SUL5 added GW 2158.
28/06/2021 --> SMI2 added GW 2164.
Starting date for BUDD and SUL5 corrected
(GW 2158 --> GW 2161)
24/02/2022 --> Added MNSK to station list (was included in
network from GW 2118).
14/03/2022 --> Corrected station information for NABG.
PPSH added from GW 2199.
Corrected formatting of station list.
14/09/2022 --> Added SPT7 station from GW 2216.
SMID and SMI2 decommissioned from GW 2223.
Added NYAL station from GW 2224.
TOR2 decommissioned from GW 2226.
Corrected 28/06/2021 comment
("SMI5" -> "SUL5").
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MEASUREMENT MODELS
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Preprocessing : Phase preprocessing in a baseline-by-baseline mode using
triple differences. In most cases cycle slips are fixed
looking simultaneously at different linear combinations of
L1 and L2. If a cycle slip cannot be fixed reliably, bad
data points are removed or new ambiguities are set up. A
check of the post-fit residuals is performed. Outliers are
removed for the final processing.
Since GPS-week 1321: 3 deg cut off in pre-processing
Basic Observable : Carrier phase, code only used for receiver clock
synchronization, elevation cut-off angle of 3 degrees,
sampling rate of 30 and 180 seconds, respectively.
Since GPS-week 1130: 10 deg in final solution
Since GPS-week 1400: 3 deg in final solution
Since GPS-week 1765: GPS and GLONASS
Since GPS week 2044: GPS, GLONASS and Galileo
Modelled : Double differences, ionosphere-free linear combination.
observable
Ground antenna : Up to GPS-week 1399: Elevation-dependent phase center
corrections are applied phase center according to the
model IGS_01. The corrections are given calibrations
relative to the AOAD/M_T antenna.
GPS-week 1400-1631: Absolute antenna phase centre
variations (APCV) according to epn_05.atx (regularly
updated with I05.atx from CODE) are applied, partly
including individual APCV.
GPS-week 1632-1764: Absolute antenna phase centre
variations (APCV) according to epn_08.atx (regularly
updated with I08.atx from CODE) are applied, partly
including individual APCV (from epnc_08.atx).
GPS-week 1765-1933: Missing system values (GLONASS) for
individual calibrated antenna models are filled with
values computed by adding the differences between
group values of GPS and GLONASS of the same antenna type
to the individually calibrated GPS values, if such group
values for the antenna type is available.
Since GPS week 1934: Absolute antenna phase centre
variations (APCV) according to epn_14.atx (regularly
updated with I14.atx from CODE) are applied, partly
including individual APCV (from epnc_14.atx).
Troposphere : Up to GPS-week 1129: Saastamoinen apriori model: Zenith
path delay corrections derived using
1/cos(z).
GPS-week 1130-1320: No troposphere apriori model used.
Zenith path delay corrections are
derived using DRY NIELL MF.
GPS-week 1321-1764: Saastamoinen apriori model mapped with
DRY NIELL mapping function and ZTD
parameters estimated using WET NIELL
mapping function.
Since GPS-week 1765: Dry VMF as apriori model and ZTD
parameters estimated using WET VMF,
no apriori constraints.
Horizontal gradient parameters estimated
/day/station(Chen-Herring), no a priori
constraints.
Ionosphere : Not modelled (ionosphere eliminated by forming the
ionosphere-free linear combination of L1 and L2).
Up to GPS-week 1320: Regional ionosphere maps are derived
in order to improve the QIF ambiguity
resolution.
GPS-week 1321-1764: CODE global ionosphere models used to
improve QIF ambiguity resolution.
Since GPS-week 1765: 2nd order of ionospheric corrections
and ray bending corrections.
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ESTIMATED PARAMETERS (APRIORI VALUES & SIGMAS)
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Adjustment : Least-squares adjustment, mathematical correlations within
network correctly modeled. The elevation-dependent
observation weighting model adopted assumes a zero-
difference observation sigma being proportional 1/cos(z),
where z denotes the satellite zenith distance angle.
Rejection Criter.: Up to week 1320: 0.003 meters for L3 residuals.
Week 1321-1764: Daily RINEX observation files containing
less than 12 hours good observations are
ignored. The threshold value concerning
data screening is 4 mm, specifically for
a normalized, or L1 zero-difference zenith
residual.
Since week 1765: Daily RINEX observation files with short
observation time are rejected. The limit
is set to 300 "observations", which
approximately corresponds to 6h GPS/GLONASS
and 12 h GPS-data. The threshold value
concerning data screening is 5 mm,
specifically for a normalized, or L1 zero-
difference zenith residual. Stations/days
with large residuals in the combined weekly
solution are rejected from the weekly
combined solution but kept in the daily
solutions if it is not affecting other
stations.
Datum definition :
Datum definition for daily and weekly sol up to week 1363:
A 3-translation condition with respect to realization of
IGS00 is imposed. The list of station defining the datum
includes the following IGS stations:
ONSA,METS,POTS,NYA1,BRUS,WTZR
Datum definition for weekly solutions week 1364-1399:
A 3-translation condition with respect to realization of
ITRF2000 is imposed. The list of stations defining the
datum currently includes the following IGS stations
(automatic outlier detection using Helmert transformation
test and if necessary repeated ADDNEQ run with reduced
number of datum stations):
BRUS,JOZE,METS,NYA1,ONSA,POTS,WTZR
Datum definition for weekly solutions week 1400-1631:
A 3-translation condition with respect to realization of
IGS05 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and if
necessary repeated ADDNEQ run with reduced number of datum
stations): BRUS,HOFN,JOZE,KELY,METS,NYA1,ONSA,POTS,QAQ1,
REYK,THU3,TRO1,WSRT,WTZR
Datum definition for weekly solutions week 1632-1675:
A 3-translation condition with respect to realization of
IGS08 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): BRUS,BUDP,HOFN,JOEN,JOZE,KELY,MAR6,NYA1,
ONSA,POTS,PTBB,QAQ1,REYK,RIGA,SASS,SPT0,SVTL,THU3,TRO1,
VAAS,VARS,VIL0,WARN,WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1676-1695:
Same defintion as above but changed fiducial stations:
BUDP,HOFN,JOEN,JOZE,KELY,MAR6,NYA1,ONSA,POTS,PTBB,QAQ1,
REYK,RIGA,SASS,SPT0,SVTL,THU3,TRO1,VAAS,VARS,VIL0,WARN,
WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1696-1708:
Same defintion as above but changed fiducial stations:
BUDP,HOFN,JOEN,KELY,MAR6,NYA1,ONSA,PTBB,QAQ1,REYK,RIGA,
SASS,SPT0,SVTL,THU3,TRO1,VAAS,VARS,VIL0,WARN,WSRT,WTZR,
YEBE
Datum definition for weekly solutions week 1709-1734:
A 3-translation condition with respect to realization of
IGB08 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and if
necessary repeated ADDNEQ run with reduced number of datum
stations): (same stations as above):
BUDP,HOFN,JOEN,KELY,MAR6,NYA1,ONSA,PTBB,QAQ1,REYK,RIGA,
SASS,SPT0,SVTL,THU3,TRO1,VAAS,VARS,VIL0,WARN,WSRT,WTZR,
YEBE
Datum definition for weekly solutions week 1735-1738:
Same defintion as above but changed fiducial stations:
BUDP,HOFN,JOEN,KELY,MAR6,NYA1,ONSA,PTBB,QAQ1,REYK,RIGA,
SPT0,SVTL,THU3,TRO1,VAAS,VARS,VIL0,WARN,WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1739-1764:
Same defintion as above but changed fiducial stations:
BUDP,HOFN,JOEN,KELY,MAR6,NYA1,ONSA,PTBB,QAQ1,RIGA,SPT0,
SVTL,THU3,TRO1,VAAS,VARS,VIL0,WARN,WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1765-1781:
A 3-translation condition with respect to realization of
IGB08 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): HERS,HOFN,JOZE,MAR6,NYA1,ONSA,POTS,QAQ1,
RIGA,SCOR,THU3,TRO1,WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1782-1809:
A 3-translation condition with respect to realization of
IGB08 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): HERS,HOFN,MAR6,NYA1,ONSA,POTS,QAQ1,
RIGA,SCOR,THU3,TRO1,WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1810-1933:
A 3-translation condition with respect to realization of
IGB08 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): HERS,MAR6,NYA1,ONSA,POTS,QAQ1,RIGA,SCOR,
THU3,TRO1,WSRT,WTZR,YEBE
Datum definition for weekly solutions week 1934-2003:
A 3-translation condition with respect to realization of
IGS14 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): BRUX, HERS, HOFN, JOZE, KELY, MAR6, METS,
NYA1, ONSA, POTS, QAQ1, RIGA, SCOR, THU3, TRO1, WSRT,
WTZR, YEBE
Datum definition for weekly solutions week 2004-2037:
A 3-translation condition with respect to realization of
IGS14 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): BRUX, HERS, HOFN, JOZE, MAR6, METS, NYA1,
ONSA, POTS, QAQ1, RIGA, SCOR, THU3, TRO1, WSRT, WTZR, YEBE
Datum definition for weekly solutions week 2038-2105:
A 3-translation condition with respect to realization of
IGS14 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): BRUX, HERS, HOFN, JOZE, MAR6, METS, NYA1,
ONSA, POTS, QAQ1, RIGA, SCOR, TRO1, WSRT, WTZR, YEBE
Datum definition for weekly solutions week 2106-now:
A 3-translation condition with respect to realization of
IGB14 is imposed. The list of stations defining the datum
currently includes the following IGS stations (automatic
outlier detection using Helmert transformation test and
if necessary repeated ADDNEQ run with reduced number of
datum stations): BRUX, HERS, HOFN, JOZE, MAR6, METS, NYA1,
ONSA, POTS, QAQ1, RIGA, SCOR, TRO1, WSRT, YEBE
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.
Since GPS-week 1400: Troposphere gradient parameters
are also solved for.
Ionospheric : Up to GPS-week 1320: 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 the IONEX format.
Since GPS-week 1321: No TEC maps solved for. The CODE global
TEC maps are used instead in the ambiguity resolution.
Ambiguity : Ambiguity resolution performed by using the QIF strategy in
conjunction with global TEC information. 10 deg cut-off.
Since GPS-week 1765: Also GLONASS ambiguity resolution.
Since GPS week 2044: Also Galileo ambiguity resolution.
Since GPS-week 2074: WL/NL and L5/L3 ambiguity resolution
strategies also used.
Satellite clock : Satellite clock biases are not estimated but eliminated by
bias forming double differences.
Receiver clock : Receiver clock biases are estimated as part of the pre-
bias processing step using code measurements.
Orbits and ERPs : Up to GPS-week 1764: IGS combined final orbit and ERP
information.
GPS-week 1765-2043: CODE final orbit and ERP information.
GPS-week 2044-2077: CODE MGEX final orbit and ERP
information.
Since GPS-week 2078: CODE rapid orbit and ERP information.
Tidal : Solid earth tidal displacements are modelled according to
displacements IERS Conventions. Ocean loading corrections are
computed based on Scherneck's amplitudes and phases.
GPS-week 1321-99: GOT00.
GPS-week 1400- : FES2004.
Up to GPS-week 1764: No atmospheric loading corrections are
applied. IERS conv. 96/2000
Since GPS-week 1765: Atmospheric tidal loading calculated
using atmospheric tidal model Ray and Ponte. Following
IERS conventions 2010.