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Current Status and Future Developments of the Brazilian Network for

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

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Current Status and Future Developments of the Brazilian Network for

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  1. 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

  2. Overview • Introduction • History • Current status of RBMC • Expansion Plan • Data Quality Control • Real-time data through internet / RBMC-IP • Modernization Plan – WADGPS • Final remarks

  3. 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

  4. In operationsince 1997 with 9 stations Station´s Configuration Double frequencyreceiverswithcomputers Phone communications Daily files – RINEX format Daily files freely available on Internet within 24h after the observation date for post-mission applications History

  5. History 1997

  6. History 1999

  7. History 2001

  8. History 2003

  9. History 2005

  10. History 2006

  11. History 2007

  12. History 2008

  13. History 2009

  14. Current Status 2010

  15. Current Status Station NAUS Amazon Region

  16. Current Status Jan2011 - 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

  17. Coverage of RBMC – considering 100Km Brazil: 8,514,876.599 km2

  18. Coverage of RBMC – considering 200Km Brazil: 8,514,876.599 km2

  19. Coverage of RBMC – considering 300Km Brazil: 8,514,876.599 km2

  20. Coverage of RBMC – considering 400Km Brazil: 8,514,876.599 km2

  21. 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

  22. Vertical Seasonal Variations of Stations Macapa Manaus Porto Velho Marabá Cuiabá Boa Vista Imperatriz Guajara-Mirim

  23. Time series – land height vs river level ~ 13 km Δh ~ 8 cm ΔNa ~ 12 m

  24. Coordinates changes in Concepcion, Chile, due to 2010 Earthquake

  25. 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

  26. 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

  27. 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

  28. Expansion Plan

  29. NewStations

  30. Data Quality Control • Data Archival • RINEXformat • 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

  31. SIGMA-RBMC Sistema de Informações Geográficas para Manutenção e Acompanhamento da RBMC

  32. StationRegisterandConfigurationHistory

  33. Station’s Receiver and Antenna Information

  34. Station Management

  35. Statisticsand Download of data

  36. RBMC webpage http://www.ibge.gov.br/home/geociencias/geodesia/rbmc/rbmc.shtm • Daily files: • Reports:

  37. 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

  38. Reference Caster Rover Networked Transport of RTCM via Internet Protocol (Ntrip)

  39. RBMC-IP configuration

  40. ModernizationPlan Cooperation Project between IBGE /AgênciaBrasileira 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 CanadaWide DGPS Service)

  41. ModernizationPlan • 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)

  42. ModernizationPlan - 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

  43. ModernizationPlan Stepsof WADGPS System Implementation • 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

  44. ModernizationPlan System Configurationof WADGPS

  45. 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 Acknowledgements

  46. Thankyou http://www.ibge.gov.br rbmc@ibge.gov.br

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