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6th Local Analysis Centres Workshop October 22-23 2008, Frankfurt am Main, Germany
Instituto Geográfico Nacional (Spain)
1
IGE
Local Analysis Centre
(Centro de Observaciones Geodésicas)
Miguel Ángel Cano VillaverdeJosé Antonio Sánchez Sobrino
Marcelino Valdés Pérez de Vargas
Fecha del Congreso 22 26th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCurrent sub-network processed
49 GNSS stations.21 of them are ERGNSS stations. 15 of them are GPS+GLONASS stations.
Fecha del Congreso 33 36th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vChanges since LAC Workshop Padova 2006From 33 to 49 stations.
New processed stations (17)ERGNSS. (8 new stations)
ZARA (1381 GPS Week).SALA (1401 GPS Week).ALBA (1444 GPS Week).HUEL (1444 GPS Week).LEON (1444 GPS Week).SONS (1444 GPS Week).CEU1 (1470 GPS Week).TERU (1499 GPS Week).
Decommissioned stationERGNSS
CEUT (1415 GPS Week).
EPN. (9 new stations)ROVE (1370 GPS Week).BADH (1374 GPS Week).BELF (1412 GPS Week).IGMI (1412 GPS Week).MOPS (1424 GPS Week).BORR (1450 GPS Week).VALA (1476 GPS Week).FUNC (1487 GPS Week).FLRS (1495 GPS Week).
Proposed stationERGNSS
IZAN à multichannel radiometer
(MFRSR)
Fecha del Congreso 44 46th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vNumber of processed stations per GPSweek
15
20
25
30
35
40
45
50
55
1100 1150 1200 1250 1300 1350 1400 1450 1500 1550
GPS Week
num
ber
of s
tatio
ns
CEUT decommissioned
Fecha del Congreso 55 56th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v Changes in Spain10 New stations
ZARA (1381 GPS Week).SALA (1401 GPS Week).ALBA (1444 GPS Week).HUEL (1444 GPS Week).LEON (1444 GPS Week).SONS (1444 GPS Week).BORR (1450 GPS Week).CEU1 (1470 GPS Week)VALA (1476 GPS Week).TERU (1499 GPS Week).
Equipment replacement (13)ACOR LEICA GRX1200PROALAC TRIMBLE NETRSALME TRIMBLE NETRSCANT TRIMBLE NETRSEBRE TRIMBLE NETRSLPAL LEICA GRX1200GGMALA LEICA GRX1200GGMAS1 JPS LEGACYRIOJ TRIMBLE NETRSVALE TRIMBLE NETRSVIGO TRIMBLE NETRSVILL ASHTECH UZ-12YEBE TRIMBLE NETRS
6 New GPS+GLONASS (in red)
Red Triangles à New stations
Fecha del Congreso 66 66th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vYEBE station issue
YEBE à Lost of data.Due to:
New 40 m radiotelescopeNew auxiliar building
Actions:New YEB1 station (200 m distance)
Co-located with a new absolute gravimeter
Try to elevate YEBE antenna from marknew ARP Up Eccentricity.
Fecha del Congreso 77 76th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vProcessing changes
Software à Bernese 5.0
Solutions provided:Weekly
with precise ephemeridesà more than 15 daysIGEwwww7.SNX
IGEwwww7.SUM
IGEwwwwd.TRO (7 files)
IGEwwwwd.SNX (7 files) New from 1418 GPSWeek
Daily
with rapid ephemeridesà 1 dayIGEwwwwdR.SNX New from 1418 GPSWeek
Fecha del Congreso 88 86th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vStrategy changes
From 1400 GPSWeekFrom relative to absolute Phase Center models(APC).
New Reference Frame ITRF2005(IGS05).
Horizontal Gradient Troposphere parametersestimation with low elevation data (up to 3º).
Our own ionosphere model to ambiguityestimation.
New ocean loading model FES2004.
Fecha del Congreso 99 96th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vOther IGE Analysis Centre projects
E-GVAPAbout 150 stations.Hourly NRT process.(using coordinates from the PP process)
Objective à ZTDDouble differences.Ultra rapid IGS orbits.Finally à The 12 last hours are combined.
Fecha del Congreso 1010 106th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vOther IGE Analysis Centre projects
IBERREDSame stations that EGVAPObjectives à
Positions.PP, coordinates to EGVAP hourly process.Atmosphere models.Time series
Weekly process.Same strategy as EPN LAC
Double differences.Final IGS orbits.
Fecha del Congreso 1111 116th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vOther IGE Analysis Centre projects
North-East Atlantic Network
Canary volcanic monitoring system.
6 ERGNSS stations (Canary Islands).
Related with AFREF.
Testing strategies.
Now, as weekly EPN LAC.Double differences.
Final IGS orbits.
Fecha del Congreso 1212 126th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vPresent works
Testing GPS+GLONASS processing.Hourly processes with ultra-rapid products (EGVAP)New Hardware platforms.New data flow diagram (Local Data Center)Testing other ambiguity resolution strategies depending on distance.
vFuture plans
Testing PPP processing.Testing orbit determination (NRT projects)
Fecha del Congreso 1313 136th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
Thanks!!
Fecha del Congreso 1414 146th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
Tenerife Volcanic Monitoring System Project
Planned.3 Tide gauges10 GPS Permanent stations.307 Km of High Precission levellingNetwork.Absolute and relative Gravity Network.6 Tiltmeters.New GPS campaigns.
About 28 points.
Installed.3 Tide gauges4 GPS Permanent stations.307 Km of High Precission levellingNetwork.Gravity Network Monumentated.
Fecha del Congreso 1515 156th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v Overview of processes. (Bernese 5.0 under Linux Suse 9.2, 2 PCs)
1st.-Daily process.Objectiveà Precise and current coordinates.
Double differences.Rapid IGS Orbits.Finally à The 28 last days are combined.Datum: Minimal constraint condition to IGS05 sites.
2nd.-Hourly NRT process. (Hourly)(using coordinates from the PP process)
Objective à ZTDDouble differences.Ultra rapid IGS orbits.Finally à The 6 last hours are combined.
Fecha del Congreso 1616 166th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vStations ProcessedTwo months ago, IGE Analysis Centre has begun the collaboration with AEMET , the Spanish Meteorological Institution, in E-GVAP.We have chosen a first network and strategy. Now, we have just get our first COST files.So, the final network and processing strategy is pending of experimentation, refinements and validation.
Fecha del Congreso 1717 176th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vStrategy changes
From 1400 GPSWeekFrom relative to absolute Phase Center models(APC)
New Reference Frame ITRF2005(IGS05).
Horizontal Gradient Troposphere parametersestimation with low elevation data. (up to 3º)
Our own ionosphere model to ambiguityestimation.
New ocean loading model FES2004.
Fecha del Congreso 1818 186th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCurrent processed Network
Total = 55 stations. All of them from:
IGS or EPN (.)4 of them
Supersites (∆)
6 of themIGS05 Datum (*)
Fecha del Congreso 1919 196th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v Overview of processes. (Bernese 5.0 under Linux Suse 9.2, 2 PCs)
1st.-Daily process.Objectiveà Precise and current coordinates.
Double differences.Rapid IGS Orbits.Finally à The 28 last days are combined.Datum: Minimal constraint condition to IGS05 sites.
2nd.-Hourly NRT process. (Hourly)(using coordinates from the PP process)
Objective à ZTDDouble differences.Ultra rapid IGS orbits.Finally à The 6 last hours are combined.
Fecha del Congreso 2020 206th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v NRT Processing Strategy (1)
Bernese 5.0 under Linux SUSE 9.2.Double differences.Ultra rapid IGS orbits.Data processing rate: 30 seconds.Last hour + 5 combined for the final solution.NRT start each hh:10NRT finish each hh:16Cut-off angle: 3ºBaseline creation strategy: max-obs.
Fecha del Congreso 2121 216th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v NRT Processing Strategy (2)
Only GPS observations.
Ambiguities float.
ZTD modeled as piece-wise linear function.
estimated every 15 minutes.
Constrains:Absolute: 5.0 m
Relative: 1.0 mm
Fecha del Congreso 2222 226th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vNext Steps (1)Network processed: Add more Iberian stations.
Fecha del Congreso 2323 236th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vNext Steps (2)
Processing Strategy.Use of GLONASS observations.
Use of network clustering
Use of meteorological data.
Hence, we need more experimentation and learn more about E-GVAP analysis centers experiences..
To validate.
To refine.
Fecha del Congreso 2424 246th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCOST file example
6th Local Analysis Centres Workshop October 22-23 2008, Frankfurt am Main, Germany
Instituto Geográfico Nacional (Spain)
25
Estado actual de procesamiento en el
Centro de Análisis Local de EUREF
(IGE)
Marcelino Valdés Pérez de Vargas
Fecha del Congreso 2626 266th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCentro Local de Análisis de la EPN
Desde la semana GPS 1130 (Septiembre del 2001).De 18 a 44 estaciones EPN(zona ibérica).Software Bernese 4.2, 5.0.Soluciones:
Semanal (efemérides precisas)latencia > 15 días
IGEwwww7.SNXIGEwwwwd.TRO
Diaria(efemérides rápidas)
latencia < 24 horasIGEwwwwdR.SNX
Fecha del Congreso 2727 276th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCombinación de soluciones de los 16 LAC
Cada estación EPN à 3 LAC.
16 SINEX
Solución final combinada.Condición de mínimo constreñimiento de translación a estaciones de referencia IGS.
EURwwww7.SNX
EURwwwwdR.SNXImagen de web EUREF
Fecha del Congreso 2828 286th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCambios en semana GPS 1400, (11-2006)
Modelo de Centro de Fase Absoluto (APC)
Nuevo marco de ref. ITRF2005 (IGS05).
Estimación de parámetros de gradiente horizontal de la Troposfera con datos de baja elevación (desde 3º).
Modelo de carga oceánica FES2004.
Fecha del Congreso 2929 296th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v Centro de fase de la antena(PC)
Distancias medidas entre Centros de Fase de la antena del receptor y del satélite.Constante del PC (PCO) à PC medio desde ARP.PCV, respecto de PCO.dependen de:
Dirección de llegada de la señal.Frecuencia L1, L2.Radomo (antenas receptor).
Calibraciones:Individuales ó genéricasPara antena o par antena/radomo.
Fecha del Congreso 3030 306th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCambio de PCV Relativos a PCV Absolutos
Antes semana 1400.PCO relativos àAOAD/M_T.Modelos PCV relativos (RPCV)à modelo IGS_01.
A antena de referencia AOAD/M_T.Receptores à Dependencia en elevación, no en azimut.Satélites à No depende de dirección.
Después semana 1400.PCO absolutos.Modelos PCV absolutos (APCV) à modelo IGSyy_wwww
Calibración con robot.Receptores à Dependencia en elevación y azimut.Satélites à depende del ángulo al nadir.
Consideración de distintos radomos.
Fecha del Congreso 3131 316th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vTestà APC - RPCDiferencias entre solución con APC y RPC (sem. 1461)
8,5
11,4
9,1
5,9
9,3
14,9
9,7
24,8
10,1
8,4
21,8
9,3
0
10,9
9,6
8,6
17,1
8,8
16,7
10
10
8,4
DUp(mm)
Rup(mm)
DE(mm)
DN(mm)RadomAntenaEst.
-3,30,82NONETRM41249.00CREU
-0,42,65,5NONETRM41249.00BADH
-2,7-3,80,2TCWDTRM29659.00VIGO
-5,9-0,4-0,3TCWDTRM29659.00VALE
-2,5-1,6-0,5TCWDTRM29659.00SONS
3,11-0,6TCWDTRM29659.00MALL
-2,1-1,8-1,7TCWDTRM29659.00MALA
13,0-8,5-5,2TCWDTRM29659.00LPAL
-1,7-2,2-0,6TCWDTRM29659.00CACE
-3,4-0,8-0,7TCWDTRM29659.00ALBA
10,0-3,6-5,2SCISTRM29659.00RABT
-2,50,80,6NONETRM29659.00ZARA
-11,800NONETRM29659.00YEBE
-0,9-1,2-1,7NONETRM29659.00SFER
-2,2-10NONETRM29659.00SALA
-3,20,21NONETRM29659.00RIOJ
5,351,3NONETRM29659.00PRAT
-3,0-0,91NONETRM29659.00LEON
4,951,3NONETRM29659.00IGMI
-1,8-1,5-1,3NONETRM29659.00HUEL
-1,81,10,1NONETRM29659.00EBRE
-3,4-0,21,7NONETRM29659.00CANT
10,4
10,9
9,9
9,9
15,3
11,1
26,8
9,7
10,3
9,8
11,4
8,1
4,7
8,4
5,8
23,5
16,5
12,6
10,7
14,7
9,5
26,1
DUp(mm)
Rup(mm)
DE(mm)
DN(mm)RadomAntenaEst.
-1,41,1-0,3NONETRM29659.00BORR
-0,90,2-1,3NONETRM29659.00ALME
-1,90,7-0,7NONETRM29659.00ALAC
-1,91,31,1DOMETRM29659.00ESCO
3,50,30,7NONELEIAT504GGMOPS
-0,7-3,13,8NONELEIAT504GGHERT
15,0-9,6-4,5NONELEIAT504PDEL
-2,1-4,4-2,2NONELEIAT504LAGO
-1,5-4,7-0,5NONELEIAT504GAIA
-2,0-4,7-1,7NONELEIAT504CASC
-0,44,74,6LEISLEIAT504ROVE
-3,7-0,68,9LEISLEIAT504DARE
-7,1-1,31,6LEISLEIAT504COBA
-3,4-1,69,1LEISLEIAT504BELF
-6,0-2,73,6LEISLEIAT504ACOR
11,72,51,3NONEJPSREGANT_DDCAGZ
4,73,81,4SCITASH701945C_MZOUF
0,81,91,4NONEASH701945C_MIENG
-1,1-0,72,5NONEASH701945B_MLROC
2,9-1,94,4SNOWASH700936D_MNEWL
-2,3-1,7-0,8NONEAOAD/M_TVILL
14,3-8-6,3NONEAOAD/M_TMAS1
Fecha del Congreso 3232 326th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vCambio de ITRF2000 a ITRF2005
Con observaciones VLBI, SLR, Doris, GNSS.
En general, datos 1980-2006.0.(GNSS 1996).
Solución final:posiciones
velocidades
EOPs
Imagen de web ITRF
Fecha del Congreso 3333 336th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vIGS05Objetivo à ITRF2005 corregido de RPC a APCProcedimiento (IGS mail 5447):
Determinación de corrección para cada estación IGS por el cambio de RPC a APC.
Cálculo de 2 soluciones simultaneas de 1 año.
Calcular solución IGS acumulativa y corregir con offsetpara cada estación.Alinear a ITRF2005 con transformación 7 parámetros.
Discrepancia con ITRF2005Global = 0Europa = 5 mm aprox. en altura.P. Ibérica= Menor en bajas latitudes
Fecha del Congreso 3434 346th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vDiferencia IGS05-ITRF2005 (EPN)
De estaciones ‘core IGS’ en Europa.
En mm ordenados por latitud ascendente.
Diferencia medias
(mm)
• N=-0.2 ± 1.0
• E=-0.4 ± 1.4
• U= 5.3 ± 6.5
Fecha del Congreso 3535 356th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vEstimación de parámetros de la TroposferaAntes de 1400.
Estimación de parámetros troposféricos cada hora y estación.Modelo apriori (condiciones estándar) à Dry-Niell.Parámetros de ZPDàWet-Niell.Sigmas a priori abs. y relà 5.0m.Máscara 10º.Ponderación de observaciones en función de la elevaciónàcos2(z).
Mejoras después de 1400.Máscara 3º.
“Decorrela alturas y correcciones ZPD, mejora precisión”Parámetros de gradiente horizontal.
“Asimetría azimutal de troposfera local en datos de baja elevación”Tipo ‘tilting’à cálculo componente ‘E’ y ‘N’.Cada 24h.
Fecha del Congreso 3636 366th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vTEST Troposfera (sem. 1461)Diferencias de coor.(con GH-sin GH):
Debajo del mm en planimetríaAltimetría, hasta 5mm.
Diferencia media0.5 ±1.2mm.
Precisiones.Mejora general.En sh≈ 15%.
0,6
0,5
0,0
0,5
0,5
0,5
0,5
0,5
0,5
0,6
0,5
0,7
0,6
0,5
1,1
0,5
0,6
0,6
0,5
1,1
0,5
0,5
sh(mm)Grd.Hr
sh(mm)
DUp(mm)
Est.
0,7-1,4ZOUF
0,63,0ZARA
0,00,0YEBE
0,6-2,7VILL
0,61,3VIGO
0,6-2,3VALE
0,6-4,3SONS
0,6-1,8SFER
0,60,4SALA
0,70,9ROVE
0,61,6RIOJ
0,7-1,6RABT
0,7-0,1PRAT
0,5-0,8PDEL
1,3-0,1NEWL
0,6-3,4MOPS
0,7-3,8MAS1
0,73,0MALL
0,6-2,9MALA
1,3-2,6LROC
0,6-2,0LPAL
0,60,1LEON
0,5
0,6
0,5
0,5
0,5
0,6
0,5
0,7
0,5
0,5
0,5
0,5
0,5
0,7
0,5
0,5
0,5
0,6
0,5
0,5
0,5
0,5
sh(mm)Grd.Hr
sh(mm)
DUp(mm)
Est.
0,6-1,5LAGO
0,72,2IGMI
0,70,6IENG
0,6-1,2HUEL
0,6-2,7HERT
0,7-1,2GAIA
0,61,5ESCO
0,8-1,3EBRE
0,6-0,9DARE
0,65,6CREU
0,6-0,6COBA
0,6-0,8CASC
0,63,3CANT
0,8-2,1CAGZ
0,6-1,1CACE
0,6-1,0BORR
0,6-2,4BELF
0,7-1,5BADH
0,6-0,4ALME
0,6-1,1ALBA
0,60,6ALAC
0,62,0ACOR
Fecha del Congreso 3737 376th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
vModelo de carga de marea oceánica.De GOT99.2 a FES2004
FES2004 Solución de elementos finitos del Grupo de Mareas Francés (FTG).
Demostrado más preciso por altimetría de satélite
(Liar et al.(2006).Ocean Dynamics).
Fecha del Congreso 3838 386th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
v Nuevos cambios
Cálculo GLONASS.
Cálculo con efemérides ultrarrápidas.
Mejora continua.
Fecha del Congreso 3939 396th LACs Workshop October 22-23 2008, Frankfurt am Main, Germany
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