IGS RNAAC SIR

Activities of IGS Regional Network Associate Analysis Centre
SIRGAS (IGS RNAAC SIR) and Solution DGF08P01
W. Seemüller, Manuela Krügel, Laura Sanchez, Hermann Drewes
Deutsches Geodätisches Forschungsinstitut,
Alfons-Goppel-Str. 11, D-80539 München/Germany
IGS RNAAC SIR
SIRGAS Working Group I: Reference Systems
DoRu - 19. Juni 2008
Montevideo, Uruguay, May 26-27, 2008
Content
• Introduction
• Activities of IGS Regional Network
Associate Analysis Centre SIRGAS
(IGS RNAAC SIR)
• Station Position and Velocity Solution
DGF08P01
• Impact of Earthquakes in the SIRGAS
Region
• Conclusion
Introduction
• The International GNSS Service (IGS) analysis a
global and several regional satellite tracking
networks by ten Analysis Centres (AC) and by
seven Regional Network Associate Analysis
Centres (RNAAC).
• Two Global Network Associate Analysis Centres
(GNAAC) combine all global and regional
network solutions to a global polyhedron
• The DGFI is acting as the IGS RNAAC SIR for
the Geocentric Reference System for the
Americas (SIRGAS)
Introduction (cont‘d)
• The IGS decided to introduce the new ITRF2005
(IGS05 resp.) solution and to implement
absolute phase centre corrections starting with
GPS week 1400
• To provide homogeneously processed weekly
solutions for the complete time span, IGS
RNAAC SIR is reprocessing all former weekly
solutions since GPS week 0860 (July 1996)
• This talk presents a new position and velocity
solution containing the weeks 1199 to 1470
(December 2002 to March 2008)
Activities of IGS RNAAC SIR
•
•
The IGS RNAAC is processing all permanent global and regional GPS
stations of South America, Central America, the Caribbean, and
surrounding areas
Each week a coordinate solution is delivered to the IGS data centres
At the beginning in July 1996 the weekly solutions contained only 10 IGS
stations, today the number of processed stations has increased to 189, 131
of them are regional stations
200
IGS stations
regional stations
all stations
180
160
No. of stations
•
140
120
100
80
60
40
20
0
1996
1997
1998
1999
2000
2001
2002
2003
Year
2004
2005
2006
2007
2008
2009
Activities of IGS RNAAC SIR
(cont‘d)
• At the workshop of the SIRGAS-WG I in Rio de
Janeiro in August 2006, Experimental
Processing Centres (EPC) and Experimental
Combination Centres (ECC) were installed. The
DGFI was appointed as an ECC
• At various meetings (e.g. GRF2006, Munich,
October 2006) comprisons of EAC solutions w.r.t
IGS RNAAC solutions were presented with
promising results
• ECC results are summarized in the DGFI Report
80 by L. Sanchez et al., 2008
Activities of IGS RNAAC SIR
(cont‘d)
• Since the year 2000 accumulative combinations
of all weekly normal equtions resulting in a multiyear position and velocity solution are generated
• Previous position and velocity solutions are
DGF00P01, DGF02P01, DGF04P01, and
DGF06P01
• Two preliminary solutions DGF07P01 and
DGF07P03 with reprocessed solutions were
presented at the AGU meetings in Acapulco
(May 2007) and San Francisco (December
2007) by posters
IGS RNAAC SIR Network (Status: June 19, 2008)
-100˚
GOLD
-20˚
CHI3
RCM5/RCM6
MTY2
CULI
AOML MIA3
NAS0
CULC
KYW1
LPAZ
INEG
EXU0
TAMP
SCUB
GTK0
UGTO
MERI
CBSB
CAM2
COL2
TOL2
PUR3
CHET GCGT
MANZ
SMRT
VIL2
ELEN
OAX2
(TGCV)
CRO1
JAMA
GUAT
TEGU/TEG1
SSIA
SLOR
ESTI ANDS
GRE0
BARB/BDOS
MANA
CRCS
ETCG
MARA
BANS
MOIN
PMB1
BOGT
SRNW
SRZN KOUR
GUAV BOAV
GALA/GLPS
MAPA
SAGA
S061
BELE
RIOP
SALU
NAUS
FORT BRFT
MANU
MABA
CRAT
IMPZ
PBCG
AMHU
CRUZ
RECF
POVE
PEPE
ALAR
RIOB
TOPL
ROJI
ROGM
MTSF
TOGU
SALV
BOMJ
SAVO,SSA1
CUIB
BRAZ
MCLA
AREQ/ARE2
GOJA
UBER MGUB GVAL
VICO
CEFE
(IQQE)
MSCG
VARG
RJCG
UEPP/PPTE MGIN
RIOD,ONRJ
POLI
CHPI
UBAT
UNSA
PARA/UFPR
NEIA
TUCU
SCLASCCH
COPO
IMBT
MECO
SMAR
EISL/ISPA
-70˚
ANDS
SAMA
BQLA
CART VALL
RIOH
MARA
MOTE
CRCS
20˚
0˚
ASC1
-20˚
POAL
CFAGCORD UCOR
UNRO
UNSJ
MZAC,E,S
(VALP)
SANT
UYRO
UYMO
IGM0/IGM1
LPGS
AZUL
CONZ
MPLA
ANTC LHCL
GOUG
-40˚
VBCA
10˚
RWSN
BANS
CUCU
APTO
-60˚
-20˚
MDO1
-80˚
-40˚
-40˚
BRMU
HER2
0˚
-60˚
PIE1
MEXI
CIC1
20˚
-80˚
COYQ
BUCA
BERR
MEDE
TUNA
QUIB
DORA
FQNE YOPA
PERA
BOGT
IBAG
BOGA VIVI
BUEN
CALI
NEVA
GUAV
POPA
TUMA
FLOR
PSTO
PDES
PARC
RIOG/RIO2
AUTF
-60˚
Colombia
0˚
OHIG/OHI2
PALM
S061
RIOP
VESL
-100˚
-80˚
IGS global stations (48)
-60˚
SIRGAS regional stations (134)
-40˚
-20˚
Stations ceased (11)
Earthquakes with impact
(Stations with brackets: no observations since more than two years)
IGS RNAAC SIR stations ordered by country
Country
Stations
Number
IGS Stations
Antarctica
OHIG/OHI2, VESL
Argentina
CFAG, CORD, LPGS, RIOG/RIO2, UNSA
Barbados
BARB/BDOS
Regional Stations
PALM
AUTF, AZUL, IGM0/1, LHCL, MECO, MPLA, MZAC, MZAE, MZAS, PDES,
RWSN, TUCU, UCOR, UNRO, UNSJ, VBCA
IGS Reg.
2
1
5
16
1
ALAR, AMHU, BELE, BOAV, BOMJ, CEFE, CRAT, CRUZ, CUIB, GOJA, GVAL, IMBT, IMPZ, MABA,
Brazil
(MANU), MAPA, MCLA, MGIN, MGUB, MSCG, MTSF, NAUS, NEIA, ONRJ, PARA/UFPR, PBCG,
BRAZ, BRFT, CHPI, (FORT)
PEPE, POAL, POLI, POVE, RECF, RIOB, RIOD, RJCG, ROGM, ROJI, SAGA, SALU, SALV, SAVO,
4
51
SCCH, SCLA, SMAR, SSA1, TOGU, TOPL, UBAT, UBER, UEPP/PPTE, VARG, VICO
Cape Verde
Chile
TGCV
Colombia
BOGT
Costa Rica
Cuba
Ecuador
El Salvador
French Guyana
Guatemala
Honduras
Jamaica
(MOIN)
Mexico
CIC1, INEG, (MANZ)
Nicaragua
Peru
Suriname
United Kingdom
Uruguay
USA
Venezuela
Other regional sites
(ESTI), MANA
1
9
ANTC, CONZ, COPO, COYQ, EISL/ISPA, IQQE, PARC, SANT, VALP
ANDS, APTO, BERR, BOGA, BQLA, BUCA, BUEN, CALI, CART, CUCU, DORA,
FLOR, FQNE, GUAV, IBAG, MEDE, MOTE, NEVA, PERA, POPA, PSTO, QUIB,
1
29
1
1
2
1
1
1
2
1
1
3
16
RIOH, SAMA, TUMA, TUNA, VALL, VIVI, YOPA
ETCG
SCUB
GALA/GLPS, RIOP
S061
SSIA
KOUR
GUAT
ELEN
(SLOR), (TEGU/TEG1)
(JAMA)
CAM2, CHET, CHI3, COL2, CULC, (CULI), HER2, LPAZ, MERI, MEXI, MTY2,
OAX2, TAMP, TOL2, UGTO, VIL2
3
PMB1, SRNW, SRZN
3
ASC1, BRMU, GOUG
UYMO, UYRO
Stations in brackets are decommissioned (11 sites)
1
2
1
AREQ
(AOML), CRO1, GOLD, MDO1, PIE1, (RCM5/6)
1
KYW1, MIA3, PUR3
6
BANS, CRCS, MARA
CBSB, EXU0, GCGT, GRE0, GTK0, NAS0, SMRT
Total Number of sites (10 are identical/replaced): 192
48
2
3
3
7
134
Station position and velocity Solution DGF08P01
• The multi-year station and velocity solution DGF08P01
covers the time period from December 2002 (GPS week
1199) to March 2008 (GPS week 1470) with 272
reprocessed weeks
• The adjustment is done with the programme ADDNEQ2
of the Bernese GPS software
• The main features of the adjustment strategy is
described in DGFI Report 79
• For the datum realization we adopted the positions and
velocities of the IGS05 stations as fiducials
• The positions and velocities of these reference stations
were constrained by NNR and NNT conditions w.r.t to
IGS05 at epoch 2004.4, such that the network is
optimally referred to IGS05 by least squares adjustment
IGS05 Fiducial Stations in RNAAC SIR
-100˚
GOLD
-80˚
-60˚
-40˚
-20˚
PIE1
MDO1
SCUB
20˚
20˚
CRO1
MANA
0˚
0˚
GLPS
ASC1
BRAZ
-20˚
-20˚
CHPI
UNSA
ISPA
CORD
SANT
LPGS
CONZ
-40˚
-40˚
-60˚
-60˚
OHI2
VESL
-100˚
-80˚
IGS global stations
IGS05 fiducial stations
-60˚
-40˚
-20˚
IGS regional stations
Earthquakes with impact
Horizontal Velocities of IGS05 Stations
-100˚
GOLD
-80˚
-60˚
-40˚
-20˚
PIE1
MDO1
SCUB
20˚
20˚
This and the next figure
CRO1
MANA
0˚
0˚
GLPS
ASC1
BRAZ
-20˚
-20˚
CHPI
UNSA
ISPA
CORD
SANT
LPGS
CONZ
-40˚
-40˚
-60˚
-60˚
OHI2
2 cm/a IGS05
2 cm/a DGF08P01
VESL
-100˚
-80˚
IGS global stations
IGS05 fiducial stations
-60˚
-40˚
-20˚
IGS regional stations
Earthquakes with impact
show the horizontal and
vertical velocities of the
IGS05 reference stations,
representing the
orientation of the solution
DGF08P01; the IGS05
stations MANA and UNSA
were excluded for the
datum realization.
Vertical velocities of IGS05 Stations
-100˚
GOLD
-80˚
-60˚
-40˚
-20˚
PIE1
MDO1
SCUB
20˚
20˚
CRO1
MANA
0˚
0˚
GLPS
ASC1
BRAZ
-20˚
-20˚
CHPI
UNSA
ISPA
CORD
SANT
LPGS
CONZ
-40˚
-40˚
-60˚
-60˚
1 cm/a
OHI2
IGS05
DGF08P01
VESL
-100˚
-80˚
IGS global stations
IGS05 fiducial stations
-60˚
-40˚
-20˚
IGS regional stations
Earthquakes with impact
Horizontal velocities of all DGF08P01 stations
-120˚
-100˚
-80˚
-60˚
-40˚
-20˚
40˚
40˚
GOLD
PIE1
MDO1
-80˚
SCUB
20˚
20˚
-75˚
-70˚
ANDS
CRO1
RIOH
SAMA
BQLA
MANA
CART
MARA
VALL
10˚
10˚
MOTE
0˚
0˚
GLPS
BANS
CUCU
APTO
BUCA
BERR
MEDE
ASC1
QUIB
TUNA
DORA
5˚
5˚
BOGT
IBAG
BOGA
BUEN
BRAZ
YOPA
FQNE
PERA
VIVI
CALI
NEVA
-20˚
-20˚
TUMA
UNSA
ISPA
GUAV
POPA
CHPI
FLOR
PSTO
CORD
0˚
SANT
0˚
LPGS
CONZ
S061
RIOP
-40˚
-40˚
2 cm/a ITRF2005
2 cm/a DGF08P01
-5˚
-5˚
-80˚
-60˚
IGS Global Station
IGS05 Fiducial Station
IGS Regional Station
2 cm/a IGS05
2 cm/a DGF08P01
-60˚
OHI2
VESL
-120˚
-100˚
-80˚
-60˚
-40˚
-20˚
-75˚
-70˚
Vertical velocities of all DGF08P01 stations
-100˚
GOLD
-80˚
-60˚
-40˚
-20˚
PIE1
MDO1
-80˚
SCUB
20˚
-75˚
-70˚
20˚
CRO1
ANDS
RIOH
SAMA
MANA
BQLA
CART
MARA
VALL
10˚
0˚
10˚
0˚
GLPS
MOTE
BANS
CUCU
APTO
ASC1
BUCA
BRAZ
BERR
MEDE
QUIB
-20˚
-20˚
UNSA
ISPA
YOPA
FQNE
PERA
5˚
BOGT
IBAG
BOGA
BUEN
CORD
SANT
TUNA
DORA
5˚
CHPI
VIVI
CALI
NEVA
LPGS
CONZ
GUAV
POPA
-40˚
TUMA
-40˚
FLOR
PSTO
0˚
0˚
S061
RIOP
-60˚
-60˚
1 cm/a
OHI2
1 cm/a ITRF2005
1 cm/a DGF08P01
VESL
IGS05 DGF08P01
-5˚
-100˚
-80˚
-60˚
-40˚
-20˚
-5˚
-80˚
-75˚
-70˚
Impact of earthquakes in the
SIRGAS region
• The western part of the IGS RNAAC SIR
region is a seismically extremely active
area, and therefore earthquakes cause
many episodic station displacements
• These episodic events have to be taken
into account in the coordinate and velocity
estimates by introducing new position
and/or velocity parameters for these
stations after an earthquake
Earthquake Signals
Earthquakes in El Salvador
Jan. 13, 2001
4
Earthquakes in Arequipa
June 23, 2001
Feb. 13, 2001
2
cm
July 07, 2001
NORTH COMPONENT
0
0
These earthquake signals
-2
-10
-4
4
EAST COMPONENT
have to be excluded
from the station and
velocity solution
0
Vertical Component
North Component
East Component
-20
cm
cm
2
-2
-4
4
-30
UP COMPONENT
cm
2
0
-40
-2
-4
1095
3600
2000
1100
1105
GPS Week
20
40
60 80
2001
1110
-50
100 120
170
a) Earthquakes in San Salvador
180
190
Days in 2001
Nov. 15
Jan. 22
IQUIQUE
Earthquake at Tarapaca/Chile, June 13, 2005, m = 7.9
Feb. 04
5
NORTH COMPONENT
8
4
cm
210
b) Earthquakes in Peru
Earthquakes near Manzanillo
Nov. 05
200
4
0
-4
3
-8
EAST COMPONENT
2
cm
cm
0
-4
-8
1
-12
0
UP COMPONENT
cm
12
-1
8
4
-2
0
1190 1195 1200 1205 1210 1215
GPS Week
280
320
2002
360
0 20 40 60 80 100120140
2003
c) Earthquakes in Mexico
-3
155
160
North Component
165
Days 2005
East Component
d) Earthquakes near Iquique
170
Vertical Component
175
MARACAIBO (MARA)
NORTH COMPONENT
8
6
cm
4
2
0
-2
-4
-6
8
EAST COMPONENT
6
cm
4
2
0
-2
-4
-6
UP COMPONENT
4
cm
2
0
-2
-4
860 880 900 920 940 960 980 1000 1020 1040 1060 1080 1100 1120 1140 1160 1180 1200 1220 1240 1260 1280 1300 1320 1340 1360 1380 1400 1420 1440 1460
GPS Week
200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0 100 200 300 0
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
Conclusion
• The DGF08P01 solution is the first reliable
station and velocity solution with reprocessed
weekly solutions based on the IGS05 reference
system and absolute phase centre corrections
• All corresponding files of DGF08P01 solution will
be available at the DFGI server
ftp://ftp.dgfi.badw-muenchen.de/pub/gps/DGF
(e.g. DGF08P01.SNX, DGF08P01.CRD,
DGF08P01.VEL, DGFI_Report79.pdf, etc.)
• The weekly solutions of former years have to be
reprocessed (GPS weeks 0860 to 1198)