M. BerrocosoM. Berrocoso(1)(1), , R. PR. Pááezez(1)(1), A. S, A. Sááncheznchez--AlzolaAlzola(1)(1), M. E. Ramirez, M. E. Ramirez(1)(1), A. P, A. Péérezrez--PePeññaa(1)(1), Y. Jim, Y. Jimééneznez(1)(1), A. Hermosilla, A. Hermosilla(2)(2), M. Redondo, M. Redondo(2)(2)..(1)(1) LaboratorioLaboratorio de Astronomde Astronomíía, Geodesia y Cartografa, Geodesia y Cartografíía. a. FacultadFacultad de de CienciasCiencias. Campus R. Campus Ríío San Pedro. Universidad de Co San Pedro. Universidad de Cáádiz. 11510 Puerto Real (Cdiz. 11510 Puerto Real (Cáádiz). ESPAdiz). ESPAÑÑA. Tel.: 956 016 287. eA. Tel.: 956 016 287. e--mails: mails: manuel.berrocoso@uca.esmanuel.berrocoso@uca.es, , raul.paez@uca.esraul.paez@uca.es. (2) . (2) InstitutoInstituto de de CartografCartografííaa de de AndaluciaAndalucia. C/ San Gregorio, 7. 41071 . C/ San Gregorio, 7. 41071 SevillaSevilla..

••Antenna Geodetic ChokeAntenna Geodetic Choke--Ring (Ring (DorneDorne––MargolinMargolin), AT504 in the first stage and ), AT504 in the first stage and geodetic antenna in the second one.geodetic antenna in the second one.

••Double frequency receivers.Double frequency receivers.

••Meteorological station (pressure, Meteorological station (pressure, humidity and temperature) only in the humidity and temperature) only in the first stage.first stage.

••2 Radio2 Radio--modem: modem: PacificCrestPacificCrest and and Satelline3AS in the first stage.Satelline3AS in the first stage.

••Continuous Internet connexion and Continuous Internet connexion and power supply.power supply.

••To constitute the geodetic reference To constitute the geodetic reference frame to Andalusia.frame to Andalusia.

••To provide GPS data to postTo provide GPS data to post--processing.processing.

••To broadcast differential corrections To broadcast differential corrections (code and carrier) via Internet and GSM. (code and carrier) via Internet and GSM. The stations at the eight The stations at the eight AndalusianAndalusiancapitals andcapitals and AlgecirasAlgeciras (Cadiz) can also (Cadiz) can also broadcast the corrections broadcast the corrections via radiovia radio. .

NETWORK OBJECTIVESNETWORK OBJECTIVESNETWORK OBJECTIVES

NETWORK DESIGNNETWORK DESIGNNETWORK DESIGN

STATIONS EQUIPMENTSTATIONS EQUIPMENTSTATIONS EQUIPMENT

NETWORK SOLUTION

AND ADJUSTMENT

NETWORK SOLUTION NETWORK SOLUTION

AND ADJUSTMENTAND ADJUSTMENT

Data have been processed using the Data have been processed using the BERNESE 5.0 GPS Software.BERNESE 5.0 GPS Software.

SFER, ALAC, CASC y VILL with ITRF SFER, ALAC, CASC y VILL with ITRF 2000 coordinates are set to be fixed in the 2000 coordinates are set to be fixed in the processing. CEUT, LAGO, COBA y ALME processing. CEUT, LAGO, COBA y ALME from the EUREF network have been from the EUREF network have been included as control stations.included as control stations.

The followed strategy is the one proposed The followed strategy is the one proposed by EUREF and IGS for the solution and by EUREF and IGS for the solution and adjustment of their networks.adjustment of their networks.

0.00070.00070.00030.00030.00100.00103834733.49753834733.4975--319058.4116319058.41165077906.41235077906.41232005/11/102005/11/10GRANGRANGranadaGranada

0.00020.00020.00010.00010.00030.00033775752.90673775752.9067--555223.4339555223.43395101056.51095101056.51092005/02/182005/02/18UCADUCADCCáádizdiz

0.00010.00010.00010.00010.00030.00033805329.89063805329.8906--217597.5929217597.59295104673.80045104673.80042006/03/152006/03/15ALMRALMRAlmerAlmerííaa

0.00020.00020.00010.00010.00030.00033738222.03653738222.0365--489449.4049489449.40495135570.54935135570.54932006/03/222006/03/22ALGCALGCAlgecirasAlgeciras

**UsingUsing Precise Precise PointPoint PositionPosition3894832.26803894832.2680--420749.1433420749.14335023360.56285023360.56282006/02/222006/02/22CRDBCRDBCCóórdobardoba

**UsingUsing Precise Precise PointPoint PositionPosition3792209.23073792209.2307--395880.1592395880.15925103686.69425103686.69422006/02/232006/02/23MLGAMLGAMMáálagalaga

**UsingUsing Precise Precise PointPoint PositionPosition3848027.08863848027.0886--528173.4171528173.4171SevillaSevilla

JaJaéénn

HuelvaHuelva

STATIONSTATION

COORDINATES REFERED TO ITRF 2000COORDINATES REFERED TO ITRF 2000

5049343.88405049343.88402006/03/232006/03/23SEVISEVI

0.00030.00030.00010.00010.00040.00043887177.36853887177.3685--332898.8341332898.83415036324.9782 5036324.9782 2005/03/292005/03/29UJAEUJAE

0.00020.00020.00010.00010.00030.00033842260.2363842260.23611--611644.0335611644.03355044358.00195044358.00192006/01/162006/01/16HULVHULV

ZZYYXXInstalledInstalledIDID

In the following figures it is displayed the daily solution coordinates and some examples of the comparison of our adjustment to the EUREF solution from 1312 to 1314 GPS week.

In the following figures it is displayed the In the following figures it is displayed the daily solution coordinates and some daily solution coordinates and some examples of the comparison of our examples of the comparison of our adjustment to the EUREF solution from adjustment to the EUREF solution from 1312 to 1314 GPS week.1312 to 1314 GPS week.

LAGO Station (X)

5035246,54935035246,54925035246,5450

5035246,53285035246,53275035246,53445035246,5000

5035246,6000

5035246,7000

5035246,8000

5035246,9000

5035247,0000

5035247,1000

57 60 63 66 69 72 75 78GPS day

X (m)

Daily

Adjusted

EUREF

Free

QUALITY CONTROL:QUALITY CONTROL:QUALITY CONTROL:

The quality of the network is continuously checked The quality of the network is continuously checked according to the procedure followed by EUREF and IGS according to the procedure followed by EUREF and IGS wichwich use the free software TEQC by UNAVCO and use the free software TEQC by UNAVCO and QC2SKY by Marco QC2SKY by Marco RoggeroRoggero from from II II FacoltFacoltàà di di IngegneriaIngegneriadel del PolitecnicoPolitecnico di di TorinoTorino. It is also used a software designed . It is also used a software designed and developed by the Laboratory of Astronomy, Geodesy and developed by the Laboratory of Astronomy, Geodesy and Cartography.and Cartography.

Some of the obtained graphics for the quality control of the Some of the obtained graphics for the quality control of the UCAD station are shown below.UCAD station are shown below.

UCAD UCAD horizonhorizon MultipathMultipath onon L1L1 MultipathMultipath onon L2L2 L1 SNRL1 SNR L2 SNRL2 SNR

BaselinesBaselines processedprocessed

xσ yσzσ

Instituto de Cartografía de Andalucía

ExpectedExpected andand obtainedobtained numbernumber ofof observationsobservations, , cyclecycle slipsslips, , multipathmultipath onon L1 L1 andand multipathmultipath onon L2 L2 forforUCAD UCAD stationstation duringduring a 45 a 45 daysdays long long periodperiod..

4545--day average value of the RAP stations.day average value of the RAP stations.

AC PowerInternet

LAGO Station (Y)

-767657,0902 -767657,0899 -767657,0895

-767657,0879 -767657,0859 -767657,0834

-767657,15

-767657,10

-767657,05

-767657,00

-767656,95

-767656,90

-767656,85

57 60 63 66 69 72 75 78GPS day

Y (m) Daily

Adjusted

EUREF

Free

ALME Station

-0,010

-0,005

0,000

0,005

0,010

0,015

0,020

0,025

0,030

1339 1340 1341 1342 1344 1345 1346 1347 1348

GPS Week

Differences (mm)

X Y Z

LAGO Station (Z)

3826194,32663826194,32773826194,32233826194,32513826194,3245

3826194,3243

3826194,20

3826194,30

3826194,40

3826194,50

3826194,60

3826194,70

57 60 63 66 69 72 75 78GPS Day

Z (m)

Daily

Adjusted

EUREF

Free

* Due to technicals problems of temporal character in thesestations, it was not possible the processing of them with thebaselines adjustment model and it would be necessary the use of the PPP strategy.

Differences between EUREF coordinatesand the obtained by the RAP processingstrategy for the ALME (Almería) stationfrom 1339 to 1349 GPS week:

IntensityIntensity ofof thethe receivedreceived L1 L1 signalsignal atatUCAD UCAD stationstation duringduring 24 24 hourshours..

IntensityIntensity ofof thethe receivedreceived L2 L2 signalsignal atatUCAD UCAD stationstation duringduring 24 24 hourshours..

The EUREF 2006 Symposium of the IAG Reference Frame Subcommission for Europe (EUREF) Background image: Patio de los leones, Alhambra de Granada (GRANADA)