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Directorate of Geosciences
Current Status and Future Developments
of the Brazilian Network for
Continuous Monitoring of GNSS - RBMC
Luiz Paulo Souto Fortes
Sonia Maria Alves Costa
Marcos Ferreira dos Santos
Jardel Aparecido Fazan
Newton José de Moura Júnior
Maria Cristina Barboza Lobianco
Geospatial World Forum
Hyderabad , India, 18 – 21 January 2011
Overview
 Introduction
 History
 Current status of RBMC
 Expansion Plan
 Data Quality Control
 Real-time data through internet / RBMC-IP
 Modernization Plan – WADGPS
 Final remarks
Introduction
Brazilian Network for Continuous Monitoring of GNSS (RBMC)
 Active geodetic control network
 First one established in South America
14+ years in operation
 Main geodetic framework in Brazil
 Main link to global reference frames
 SIRGAS2000 is realized in Brazil mainly through its stations
Stations with last generation double frequency GNSS receivers
Daily files available on internet after 24 hours of observation
History
In operation since 1997 with 9 stations
Station´s Configuration
Double frequency receivers with computers
Phone communications
Daily files – RINEX format
Daily files freely available on Internet within 24h after the
observation date for post-mission applications
History
10
1997
5
0
MANA
FORT
IMPZ
-5
-10
BOMJ
CUIB
-15
BRAZ
-20
VICO
UEPP
-25
-30
RBMC stations in operation
Escala Gráfica (km)
000
-35
-75
PARA
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
YEAR
N° OF
STATIONS
1993
1
1997
9
History
10
1999
5
0
MANA
IMPZ
RECF
-10
BOMJ
SALV
CUIB
BRAZ
-20
VICO
UEPP
-25
-30
RBMC stations in operation
-35
-75
PARA
Escala Gráfica (km)
000
-70
500
-65
POAL
1000
-60
N° OF
STATIONS
1993
1
1997
9
1999
12
FORT
-5
-15
YEAR
-55
-50
-45
-40
-35
-30
History
10
2001
5
0
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
FORT
IMPZ
-5
CRAT
RECF
-10
BOMJ
SALV
CUIB
-15
BRAZ
MCLA
GVAL
UBER
-20
VICO
UEPP
VARG
RIOD
-25
-30
RBMC stations in operation
Escala Gráfica (km)
POAL
SMAR
000
-35
-75
PARA
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
History
10
2003
5
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
MAPA
0
BELE
FORT
IMPZ
-5
CRAT
RECF
-10
BOMJ
SALV
CUIB
-15
BRAZ
MCLA
GVAL
UBER
-20
VICO
VARG
UEPP
RIOD
POLI
-25
-30
PARA
Escala Gráfica (km)
NEIA
POAL
SMAR
000
-35
-75
UBAT
RBMC stations in operation
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
History
10
2005
5
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
2005
25
MAPA
0
BELE
NAUS
BRFT
FORT
IMPZ
-5
CRAT
RECF
POVE
-10
BOMJ
SALV
CUIB
-15
BRAZ
MCLA
GVAL
UBER
-20
VICO
PPTE
VARG
RIOD
-25
-30
PARA
Escala Gráfica (km)
NEIA
POAL
SMAR
000
-35
-75
UBAT
RBMC stations in operation
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
History
10
2006
5
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
2005
25
2006
27
MAPA
0
BELE
NAUS
BRFT
IMPZ
-5
CRAT
RECF
POVE
-10
BOMJ
SALV
CUIB
-15
BRAZ
MCLA
GVAL
UBER
-20
VICO
VARG
PPTE
CHPI
POLI
-25
-30
PARA
Escala Gráfica (km)
RIOD
NEIA
POAL
SMAR
000
-35
-75
UBAT
RBMC stations in operation
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
History
10
2007
5
BOAV
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
2005
25
2006
27
2007
37
MAPA
0
SAGA
SALU
BELE
NAUS
BRFT
MABA
-5
IM PZ
CRAT
CRUZ
RECF
-10
RIOB
POVE
BOMJ
SAVO SSA1
SALV
CUIB
-15
BRAZ
MCLA
GVAL
UBER
-20
VICO
CEFE
VARG
PPTE
CHPI RIOD
POLI
-25
-30
UBAT
RBMC stations in operation
UFPR
Escala Gráfica (km )
POAL
NEIA
IMBT
SMAR
000
-35
-75
ONRJ
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
History
10
2008
5
BOAV
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
2005
25
2006
27
2007
37
2008
55
MAPA
0
SAGA
SALU
BELE
NAUS
BRFT
MABA
-5
CEEU
IM PZ
CRAT
AMHU
CRUZ
PBCG
RECF
-10
RIOB
POVE
TOPL
ROGM
ALAR
PEPE
MTSF
ROJI
TOGU
SAVO SSA1
BOMJ
SALV
CUIB
-15
BRAZ
MCLA
UBER
GOJA
MGUB
MSCG
-20
MGMC
GVAL
PPTE
VICO
VARG
MGIN CHPI
RIOD
POLI
-25
UFPR
Escala Gráfica (km )
ONRJ
NEIA
SCLA
POAL
IMBT
SMAR
000
-35
-75
RJCG
UBAT
RBMC stations in operation
SCCH
-30
CEFE
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
History
10
2009
5
BOAV
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
2005
25
2006
27
2007
37
2008
55
2009
66
MAPA
0
SAGA
SALU
BELE
NAUS
BRFT
MABA
-5
CEEU RNMO
IMPZ
RNNA
CRAT
AMHU
CRUZ
PBCG
RECF
-10
RIOB
POVE
ROGM
TOPL
MTCO
PEPE
MTSF
ROJI
TOGU
CUIB
-15
BOMJ
ALAR
BAIR
SAVO SSA1
SALV
BAVC
BRAZ
MCLA
BATF
MGMC
GVAL
MGBH
MGUB
CEFE
VICO
VARG
PPTE MGIN CHPI RIOD RJCG
UBER
GOJA
MSCG
-20
MSDO
POLI
PRMA
-25
RBMC stations in operation
PRGU
SCCH
-30
Escala Gráfica (km)
UBAT
NEIA
SCLA
POAL
IMBT
SMAR
000
-35
-75
UFPR
ONRJ
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
Current Status
10
2010
5
BOAV
YEAR
N° OF
STATIONS
1993
1
1997
9
1999
12
2001
18
2003
22
2005
25
2006
27
2007
37
2008
55
2009
66
2010
80
MAPA
0
SAGA
NAUS
SALU
BELE
PAST
BRFT
PAIT
MABA
-5
RNNA
CRAT
MABS
AMHU
CRUZ
CEEU RNMO
IMPZ
-10
RIOB
POVE
ROGM
TOPL
MTCO
TOGU
CUIB
-15
PEPE
BABR
MTSF
ROJI
BOMJ
PBCG
RECF
PISR
ALAR
BAIR
SAVO SSA1
SALV
BAVC
BRAZ
MCLA
BATF
MGMC
GVAL
UBERMGRP
MGBH
MGUB
MSCG ILHA
CEFE
VICO
SJRP MGVA
SPAR
MSDO
ROSA
PPTE MGIN CHPI RIOD RJCG
SPCA
POLI
ONRJ
PRMA
UBAT
UFPR
PRGU
NEIA
GOJA
-20
-25
RBMC stations in operation
SCCH
-30
Escala Gráfica (km)
POAL
IMBT
SMAR
000
-35
-75
SCLA
-70
500
-65
1000
-60
-55
-50
-45
-40
-35
-30
Current Status
10
5
BOAV
MAPA
0
SAGA
NAUS
SALU
BELE
PAST
BRFT
PAIT
MABA
-5
RNNA
CRAT
MABS
AMHU
CRUZ
CEEU RNMO
IMPZ
RECF
PISR
-10
RIOB
POVE
ROGM
TOPL
MTCO
TOGU
CUIB
-15
PEPE
BABR
MTSF
ROJI
BOMJ
PBCG
ALAR
BAIR
SAVO SSA1
SALV
BAVC
BRAZ
MCLA
-20
-25
RBMC stations in operation
BATF
MGMC
GVAL
UBERMGRP
GOJA
MGBH
MGUB
MSCG ILHA
CEFE
VICO
SJRP MGVA
SPAR
MSDO
ROSA
PPTE MGIN CHPI RIOD RJCG
SPCA
POLI
ONRJ
PRMA
UBAT
UFPR
PRGU
NEIA
SCCH
-30
Escala Gráfica (km)
IMBT
SMAR
000
-35
-75
SCLA
POAL
-70
500
-65
1000
-60
-55
-50
-45
-40
Station NAUS
Amazon Region
-35
-30
Current Status
Jan 2011 - 80 stations in operation and 7 new ones being tested
IGS stations: BRAZ, POVE, SALU, SAVO, RECF, UFPR
More than 6000 downloads per month
All stations belong to SIRGAS-CON network (IGS densification
network in Latin America and the Caribbean)
Data are used for a wide range of scientific and practical
applications, such as monitoring of crust deformation, numerical
weather prediction, estimation of IGS orbits, measurement of rural
properties boundaries, and position in general
Coverage of RBMC – considering 100Km
Brazil: 8,514,876.599 km2
Coverage of RBMC – considering 200Km
Brazil: 8,514,876.599 km2
Coverage of RBMC – considering 300Km
Brazil: 8,514,876.599 km2
Coverage of RBMC – considering 400Km
Brazil: 8,514,876.599 km2
SIRGAS-CON Network
Maintenance of the Brazilian (and
SIRGAS) Geodetic Framework SIRGAS2000 by monitoring the
coordinates of the Reference
Network
Evaluation of the coordinates over
time, by calculating the velocities
Data processing of GNSS stations of
the following countries by IBGE in a
weekly basis: France, Guiana,
Suriname, Venezuela, Ecuador,
Peru, Bolivia, Chile, Argentina,
Uruguay.
Around 130 stations
Vertical Seasonal Variations of Stations
Boa Vista
Macapa
Manaus
Imperatriz
Porto Velho
Marabá
Guajara-Mirim
Cuiabá
Time series – land height vs river level
Linígrafo x GPS - (Normalizado 1 e -1)
Linígrafo
GPS
1,0
Variação (-1,1)
0,6
0,2
-0,2
-0,6
-1,0
28/12/2005 28/06/2006
28/12/2006 28/06/2007
28/12/2007 28/06/2008
28/12/2008 28/06/2009
28/12/2009
~ 13 km
Data
Δh ~ 8 cm
ΔNa ~ 12 m
Coordinates changes in Concepcion, Chile, due to 2010
Earthquake
Online Service supported by RBMC
IBGE-PPP
Precise Point Positioning
• Free service for GPS data processing
• Results available by 48 hours after
the observation period
• NRCan’s PPP software licensed
IBGE-PPP users/month
71
96
103
Jun-10
may/10
Mar-10
feb/10
Jan-10
Dec-09
42 36 38
31
Nov-09
oct/09
sep/09
aug/09
Jul-09
33 33 31 34
28
Jun-09
may/09
apr/09
Mar-09
feb09
Jan-09
42
86
apr/10
120
100
80
60
40
20
0
Expansion Plan
Cooperation Agreement was signed in 2006 between
IBGE and INCRA
In 2007 INCRA acquired 83 double frequency receivers
with the main features
 IP network port for connecting the receiver to
LAN/Internet with no local computer

Be remotely controlled through Internet

Both store and transfer data through Internet to
the Network Control Center

Be slaved to external frequency standard input

Possibility of L2C and L5 signals tracking or
easily upgradeable
Expansion Plan
All stations have 24 hours internet connection
(cable or satellite link)
Data availability:
 Hourly-5 sec (INCRA website) and
 Daily-15 sec (IBGE website)
Future: 100+ stations by 2014
Expansion Plan
# RECEIVERS
Type
mar/07
jun/10
NetRS
2
19
NetR5
0
43
Trimble 4000SSi
17
3
Leica GRX1200
1
5
NetR8
0
5
Ashtech UZ-12/FX
4
5
TOTAL
24
80
New Stations
Data Quality Control
Data Archival
 RINEX format
 IGS Broadcast orbits (brdcDDD0.YYn)
 24 hour sessions
 15 sec observation rate
 Observation and broadcast orbits compacted in ZIP format
RINEX files header fixed with program RBMCheck
TECQ software used for checking file structure and
quality
SIGMA-RBMC
Sistema de
Informações
Geográficas para
Manutenção e
Acompanhamento da
RBMC
Station Register and Configuration History
Station’s Receiver and Antenna Information
Station Management
Statistics and Download of data
RBMC webpage
http://www.ibge.gov.br/home/geociencias/geodesia/rbmc/rbmc.shtm
 Daily files:
 Reports:
RBMC Real Time Sub-network - RBMC-IP
NTRIP protocol
IBGE caster streaming data from 26 mountpoints located in
main cities
Format: RTCM (version 3) format or any GNSS format (RAW,
RINEX)
9 stations belong to RTIGS and IGS-IP networks
Free access through login and password – each user can get
real time data of up to 3 stations, during 90 days, after which
he/she has to renew the login and password
A new version of NTRIP client, BNC 2.2, allows clocks
corrections for SIRGAS2000, providing RTK solutions directly
in SIRGAS2000 with no need of additional transformations
Networked Transport of
RTCM via Internet Protocol (Ntrip)
Reference
Caster
Rover
RBMC-IP configuration
Modernization Plan
Cooperation Project between
IBGE /Agência Brasileira de Cooperação (ABC) and
University of New Brunswick (UNB)/Canadian
International Development Agency (CIDA)
Generation of real-time WADGPS corrections
Technology transfer from NRCan – CDGPS
(Real-Time Canada Wide DGPS Service)
Modernization Plan
Pilot Project: 26 stations (RBMC-IP) – transmitting data for
computation of WADGPS corrections and sending through
Internet
Expected horizontal accuracy
 about 1 meter (95%) for single frequency users
 about 0.5 meter (95%) or better for double frequency
users
Schedule
 Installation of systems (RTAP and GPSC)
 Evaluation and tests (2009 to 2011), and operation (2012)
Modernization Plan - Equipments
2 servers HP - Itanium2 (Processing)
Configuration: Proc. 1.6 Ghz / 6 Mb-cache / 2 HD SCSI
73Gb 2Gb RAM
2 servers Opteron Dual Core (Data Base)
Configuration: Proc. 1.8 Ghz / 2 Mb-cache / 4 HD SATA
400Gb / 2Gb RAM
Time server (Rubidium standard)
Nobreak system for the Control Center
Modernization Plan
Steps of WADGPS System Implementation
(1) Connect a subset of receivers to atomic clock. CEEU (located in
Fortaleza) is connected to a Hydrogen Maser and ONRJ
(located in Rio de Janeiro) is connected to a Cesium clock that
belongs to the Brazilian Time Service at the National
Observatory
(2) Operate a group of stations streaming data in real-time
(3) Installation of servers responsible for the computation of
corrections
(4) Installation and configuration of software for data format
conversion, data scan and data base management, and
computation of corrections (RTAP)
(5) Installation and configuration of a NTP time server (to slave the
server's CPU to GPS time)
(6) Near real-time orbit computations
Modernization Plan
System Configuration of WADGPS
Acknowledgements
Instituto Nacional de Colonização e Reforma Agrária
(INCRA)
Observatório Nacional (ON)
Instituto Nacional de Pesquisas Espaciais (INPE)
The Canadian International Development Agency (CIDA)
for funding towards the modernization of the RBMC
NRCan for the technology transfer
Several Brazilian agencies supporting the operation of the
RBMC network
Thank you
http://www.ibge.gov.br
[email protected]