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EUREF LOCAL ANALYSIS CENTRE
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Agency acronym : IGE
Institution : Instituto Geografico Nacional - Spain
Mail Address : Sercicio de Programas Geodesicos
: C/ General Ibanez Ibero, 3
: 28003 Madrid
Country : Spain
Primary Contact
Contact Name : Jose Antonio Sanchez Sobrino
Telephone : (34) 915979428
Fax : (34) 915979616
E-Mail : jassobrino@fomento.es
Secondary Contact
Contact Name : Marcelino Valdes Perez de Vargas
Telephone : (34) 915979433
Fax : (34) 915979616
E-Mail : mvaldes@fomento.es
Software Used : Bernese GPS Software Version 4.2 from week 1119 to 1363
: Bernese GPS Software Version 5.0 since week 1364 to 1755
: Bernese GPS Software Version 5.2 since week 1756
Stat. Included in Analysis : 4CHAR start- stop
ACOR (EPN) 1119 - now
ALAC (EPN) 1119 - now
ALBA (EPN) 1444 - now
ALME (EPN) 1119 - now
AXPV (EPN) 1577 - now
BADH (EPN) 1374 - now
BCLN (EPN) 1856 - now
BELF (EPN) 1412 - now
BELL (EPN) 1756 - now
BORR (EPN) 1450 - now
BRMF (EPN) 1855 - now
BRON (EPN) 1740 - 1764 (excluded)
CACE (EPN) 1119 - now
CAEN (EPN) 1577 - now
CAG1 (EPN) 1882 - now
CAGZ (EPN) 1237 - 1759 (excluded)
CANT (EPN) 1119 - now
CARG (EPN) 1864 - now
CASB (EPN) 1811 - now
CASC (EPN) 1119 - now
CEUT (EPN) 1144 - 1415 (decomissioned)
CEU1 (EPN) 1470 - now
COBA (EPN) 1312 - now
CREU (EPN) 1119 - now
DARE (EPN) 1229 - now
EBRE (IGS) 1119 - now
ESCO (EPN) 1177 - now
FLRS (ENP) 1495 - now
FUNC (EPN) 1487 - now
GAIA (EPN) 1119 - now
GARI (EPN) 1557 - now
GRAC (EPN) 1870 - now
HERT (IGS) 1232 - now
HUEL (EPN) 1444 - now
IENG (IGS) 1256 - now
IGMI (EPN) 1412 - now
ILDX (EPN) 1740 - now
IZAN (EPN) 1515 - now
LAGO (EPN) 1119 - now
LEON (EPN) 1444 - now
LLIV (EPN) 1756 - now
LPAL (IGS) 1119 - now
LROC (IGS) 1166 - now
MALA (EPN) 1349 - now
MALL (EPN) 1119 - now
MAN2 (EPN) 1577 - now
MAS1 (IGS) 1119 - now
MATG (EPN) 1857 - now
MDOR (EPN) 1577 - now
MELI (IGS) 1701 - now
MOPS (EPN) 1424 - now
NEWL (EPN) 1277 - now
PASA (EPN) 1870 - now
PDEL (IGS) 1166 - now
PRAT (EPN) 1226 - now
RABT (IGS) 1119 - now
RIOJ (EPN) 1349 - 1683 (decomissioned)
RIO1 (EPN) 1701 - now
ROVE (EPN) 1370 - now
SALA (EPN) 1401 - now
SCOA (EPN) 1577 - now
SCOR (IGS) 1645 - now
SFER (IGS) 1119 - now
SMNE (EPN) 1577 - now
SONS (EPN) 1444 - now
TARI (EPN) 1856 - now
TERC (EPN) 1565 - now
TERU (EPN) 1499 - now
TLLG (EPN) 1811 - now
TLMF (EPN) 1577 - now
UCAG (EPN) 1857 - now
USAL (EPN) 1588 - now
VALA (EPN) 1476 - now
VALE (EPN) 1119 - now
VIGO (EPN) 1349 - now
VILL (IGS) 1119 - now
YEBE (IGS) 1119 - now
ZARA (EPN) 1381 - now
ZOUF (EPN) 1253 - now
EUREF solutions generated : IGEwwww7.SNX Solution for 1 week for GPS week 'www' in SINEX format
for GPS week 'wwww' IGEwwww7.SUM Processing summary file for 1 week
IGEwwwwd.TRO Daily troposphere SINEX solution (d[0-6])
IGEwwwwd.SNX Daily SINEX solution (d[0-6])
IGEwwwwdr.SNX Daily rapid ephemerides solution in SINEX format
EUREF solutions sent to : igs.ifag.de (BKG)
Report generated : 08/08/01
Report updated : 24/03/06
24/01/07
26/04/13
18/09/13 - software used updated
28/05/14 - new stations added
25/02/2015 - correction of mistake: GMF instead VMF in Troposphere section
21-12-2016 - adding BCLN, BRMF, CAG1, CARG, CASB, GRAC, MATG, PASA, TARI, TLLG and UCAG ...
and from Wk 1924, orbits changed from IGS to CODE
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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.
Basic Observable : Carrier phase, code only used for receiver clock sync.
Elevation angle cutoff :
10 degrees + elevation dependent weighting
since week 1400: 3 degrees + elevation dependent
weighting with cos-z.
Data sampling (for ambiguity resolution) : 30 s
Data sampling (for final processing) : 180 s
Since GPS week 1756: GPS+GLONASS observations are used
Modelled : Double-differences, ionosphere-free linear combination
observable
Ground antenna : up to week 1400: Elevation-dependent phase center corrections are
phase center applied to model the differences between different
calibrations antenna types (e.g. Rogue and Trimble)
We use the IGS_01 model (no exceptions). Corrections
are given relative to the AOAD/M_T (TRM29659.00) antenna.
since week 1400: Absolute antenna phase center corrections
(exceptions for stations with indiv. absol. calibrations)
considering antenna radome codes. If antenna/radome pair
has no available calibrations, the corresponding
values for the radome code "NONE" are used
Satellite antenna: since week 1400: Absolute antenna phase centre corrections
phase center based on IGS05 model.
calibrations
since week 1632: Absolute antenna phase center corrections
based on IGS08 model (exceptions for stations with indiv.
absol. calibrations) considering antenna radome codes.
If antenna/radome pair has no available calibrations,
the corresponding values for the radome code "NONE" are used.
Troposphere : up to week 1364: No a priori model,
estimating zenith delays in 1 hour
intervals for each station,
mapping function: Dry Niell
since week 1364: Saastamonien-based dry component mapped
with the dry-Niell mapping
function is used as a priori model.
To map the wet component, the wet-Niell
mapping function is used.
since week 1400: Dry-Niell as a priori model,
estimation of zenith delay corrections
at 1-hour intervals for each station,
using the wet-Niell MF, no a priori sigmas.
Horizontal gradient parameter estimated/day/station
(TILTING), no a priori constraints.
Compute daily TRO files with fixed cummul.
coordinates input from weekly solution.
since week 1756: GMF as a priori model, mapped with
DRY GMF mapping function and ZPD
parameters estimated using WET GMF
mapping function and CHENHER gradient
estimation model.
Daily TRO files obtained from the final
weekly solution.
Ionosphere : Regional ionospheric model calculated used for QIF
ambiguity estimation.
Not modelled in final solution (ionosphere eliminated
by forming the ionosphere-free linear combination
of L1 and L2).
Ocean loading : Using Ocean-Loading-Model computed by H.G.Scherneck
Onsala Space Observatory
Since GPS week 1400 : FES2004 model
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ESTIMATED PARAMETERS (APRIORI VALUES & SIGMAS)
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Adjustment : Weighted least-squares algorithms
Rejection Criter.: up to week 1364: No rejection during parameter estimation procedure.
Outliers are marked during pre-processing step.
since week 1364: Daily RINEX observation files containing
less than 10 percent of possible observation
are ignored.The threshold value concerning
data screening is 2.5 mm, specifically for
a normalized, or L1 zero-difference zenith
residual.Station where baseline data exceeding the
overall sigma level of 5 millimeters is excluded.
Datum definition : One station constrained YEBE (0.1 mm) to the ITRFyy
The ITRFyy velocities are used for daily coordinates updates.
from week 1400 to 1631: YEBE used for minimal constraints to IGS05
from week 1632 to 1708: YEBE used for minimal constraints to IGS08
from week 1709 to 1754: YEBE used for minimal constraints to IGb08
from week 1756: minimal constraint to a set of 22 stations selected
from the constraints core stations used for the EUREF final solution
(3-translation Helmert): ACOR ALAC ALME CAGZ CANT CASC HERT IENG LAGO
LPAL LROC MALL MAS1 NEWL PDEL RABT SFER VALE VILL YEBE
IGb08 coordinates from EPNIGB08.CRD and .VEL
Outlier for station Datum rejection in Helmert: 5 mm in north & east
and 20 mm in up component.
Troposphere : Absolut constraints: 5.0 m, Relative constraints: 5.0 m
Compute daily TRO files with coordinates input from weekly solution.
Estimation trop. parameter in 1 hour interval.
Ionosphere : Regional ionospheric model for QIF ambiguity resolution.
Ambiguity : Ambiguity resolution is performed by using the quasi-
ionosphere-free (QIF) strategy with regional TEC information.
Elevation angle cutoff :10 degrees
From GPS week 1756: Advanced ambiguity resolution (AR) scheme:
- Code-Based Widelane (WL) AR for baselines shorter
than 6000km, a Melbourne-Wuebbena wide-lane
and narrow-lane AR is performed.
- Phase-Based Widelane (L5) AR for baselines shorter
than 200 km the code-based wide-lane AR is replaced
by a phase-only wide-lane before the narrow-lane AR.
- Quasi-Ionosphere-Free (QIF)AR applied on the
remaining real-valued ambiguities for baselines
shorter than 2000 km.
- Direct L1/L2 AR on baselines shorter than 20 km.
After this, each baseline is processed with introducing
the resolved ambiguities with their integer values and
checking the residuals.
- 10 degrees cut off for the AR.
Satellite clock : Satellite clock biases are not estimated but eliminated
bias by forming double-differences.
Receiver clock : Receiver clock corrections are estimated as part of the
biases preprocessing using code measurements. They are finally
eliminated by forming double differences.
Orbits and ERPs : IGS final orbit and ERP information.
-> DE200 planetary ephemeris
-> JGM3 Earth geopotential model.
From GPS week 1756: DE405 planetary ephemerides
Until GPS week 1923: IGS final orbit and ERP information
For rapid solution: CODE orbits (GPS and GLONASS)
From GPS week 1924: CODE orbits (GPS and GLONASS) and
ERP also for final solution
Tidal : Solid earth tidal displacements are modeled according to
displacements IERS conventions 1996. Ocean loading corrections are
computed based on Scherneck's amplitudes and phases. No
atmospheric loading corrections are taken into account.
From GPS week 1756: atmospheric loading corrections
introduced
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