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CBERS Program: An Overview
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  1. CBERS Program: An Overview Earth Observation Directorate September 2004 Prepared by José Carlos Epiphanio (CBERS Application Program Manager) and Gilberto Câmara (Director for Earth Observation)

  2. CBERS: China-Brazil Earth Resources Satellite • Brief History • Initial agreement signed in July 6th, 1988, covering CBERS-1 and 2. • In 2002, both governments decided to expand the initial agreement by including CBERS-3 and 4. • Program objectives • Build a family of remote sensing satellites to support the needs of users in earth resources applications • Improve the industrial capabilities of space technology in Brazil and China

  3. CBERS Program Timeline

  4. CBERS Satellite Platform Total Weight: 1500 Kg Dimension: 1,8 x 2,0 x 2,2 m Power: 1100W AOCS: 3 axis stabilization Compatible with Long March-4 launch vehicle. Payload bit rate: 53 Mb/sec x 2 (CBERS-1,2) 150 Mb/sec x 2 (CBERS-3,4) Design already qualified in CBERS-1 and 2, will be improved for CBERS-2B, 3 and 4

  5. CBERS Orbit • Sun synchronous • Height: 778 km • Inclination: 98,48 degrees • Period: 100,26 min • Equator crossing time: 10:30 AM • Revisit: 26 days • Distance between adjacent tracks: 107 km

  6. CBERS-2

  7. Service Module Structure Brasil Thermal Control China Attitude and Orbit Control China Power supply Brasil On-board computer China Telemetry Brasil Payload Module CCD China IRMSS China WFI Brasil Data Transmission China Data collection Brasil Work Share (70% China, 30% Brazil)

  8. CBERS-2 being put into Long March-4B

  9. Long March-4B • Height: 44 meters • 3 stages, liquid fuel • Capacity of launching 2800 kg in sun-synchronous orbit (900km) • Total weight: 250 tons (232 tons of fuel) • Launched 6 times with success since May 1999

  10. CBERS-2 CBERS-2 Launch (21 October 2003)

  11. CBERS-2 Orbits

  12. CBERS 1,2, 2B Sensor Configuration WFI 260 m (890 km) MSS 80 m (120 km) CCD 20 m (120 km) 2.3 0.4 0.5 0.7 0.9 1.1 1.5 1.7 2.5 mm Built by China Built by Brazil

  13. CBERS-1,2, 2B Sensor Configuration

  14. CBERS2-WFI – 157/124, 18/01/2004, São Paulo WFI sensor Image CBERS-2 WFI

  15. WFI sensor CBERS2-WFI – 157/124, 10/03/2004, São Paulo

  16. CBERS-2 IRMSS (Rio Preto, Brazil) 10/03/2004 CB2-IRM-157/123, 18/01/2004 CB2-CCD CB2-CCD

  17. IRMSS sensor CB2-IRM-157/124, 24/3/2004, Catanduva (Brazil)

  18. CB2-IRM-159/126, 30-03-2004 CB2-CCD-159/126, 30-03-2004 CBERS2 - IRMSS x CCD (Maringá, Brazil)

  19. CBERS-2 CCD, Minas Gerais, Brazil

  20. CB2 – CCD 156/121- 4/11/2003 – Brazil

  21. CBERS-2 CCD Sobradinho Dam, Brazil Dez 2003

  22. CBERS-2 CCD, Parnaíba River Delta, Nov 2003

  23. CBERS-2 CCD Manaus, Brazil, Dec 2003

  24. CBERS-2 CCD, Pradópolis, Brazil, Nov 2003

  25. CBERS 3 – 4 Sensor Configuration WFI 73 m (860 km) MSS 40 m (120 km) CCD 20 m (120 km) MUX 10 m (60 km) PAN 5 m (60 km) 2.1 0.4 0.5 0.7 0.9 1.1 1.5 1.7 2.3 Built by China Built by Brazil mm

  26. Optical Sensors (Medium Resolution, Global Coverage)

  27. Optical Sensors (Large Swath, High Temporal Resolution)

  28. CBERS 3/4 x LANDSAT-8 TM 30 m (180 km) PAN 15 m (180 km) WFI 73 m (860 km) MSS 40 m (120 km) CCD 20 m (120 km) MUX 10 m (60 km) PAN 5 m (60 km) 2.1 0.4 0.5 0.7 0.9 1.1 1.5 1.7 2.3 mm

  29. CBERS 3/4 x IRS-P6 e IRS-P5 AWFIS 70 m (700 km) LISS 23 m (140 km) MSS 5.8 m (24 km) PAN 2.5 m (30 km - stereo) WFI 73 m (860 km) MSS 40 m (120 km) CCD 20 m (120 km) MUX 10 m (60 km) PAN 5 m (60 km) 2.1 0.4 0.5 0.7 0.9 1.1 1.5 1.7 2.3 mm

  30. Order Management System Acquisition Planning System Reception & Recording System Catalogue Browse System Quality Control System Product Generation System CBERS Ground Station

  31. CBERS Ground Station in Brazil • Developed by Brazilian company and INPE • Major cost saving • User-centered design • User requests products in a web interface • Products are generated automatically • User can download products via FTP • Efficiency and scalability • Based on low-cost Linux PCs • Totally automated, no operator intervention

  32. Ground Station Design Principles • Low-cost hardware • Standard PCs • Open software and standards • Linux, GCC, Apache, PHP, MySQL, HDF, GeoTIFF, XML • Scalability and automation • Modules, distributed processing • Use of Internet technology • Scripting languages, Web browser

  33. CBERS Image Distribution in Brazil (May to August 2004)

  34. FTP area for User

  35. Data Policy for CBERS • Three different situation • Case 1: Distribution of data received at China and Brazil • Case 2: Use of on-board data recorder • Case 3: Data reception and distribution by other ground stations

  36. Case 1 Imagens received by Brazil/China ground stations • These ground stations have unlimited access to all data collected within their footprint. • The policy for distribution of data collected by those ground stations will be decided by each operator. • CRESDA can distribute all data collected by the Urumqi, Guangzhou and Beijing ground stations according to its best interests • INPE can distribute all data collected by the Cuiaba ground station according to its best interests

  37. CASE 2 - Images obtained by OBDR • INPE and CRESDA have exclusive rights for use of on-board data recorder for CBERS-2 and CBERS-2B

  38. CASE 3 – Distribution of Images Outside Brazil/China • CRESDA and INPE will license a third party company that will sell access time to CBERS for international ground stations • CBERS is marketed as a LANDSAT-class satelite • Access fee covers full downlink to data on ground station footprint • Software and hardware for CBERS ground stations is provided by a company licensed by INPE and CRESDA