cbers program: an overview earth observation directorate september 2004 prepared by josé carlos...
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CBERS Program: An Overview
Earth Observation DirectorateSeptember 2004
Prepared by José Carlos Epiphanio (CBERS Application Program Manager) and Gilberto Câmara (Director for Earth Observation)
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
CBERS Program Timeline
Launch Date
Operation 2004 2005 2006 2007 2008 2009 2010 2011
CBERS-1 1999 4 years
CBERS-2 2003 4 years
CBERS-2B 2006 4 years
CBERS-3 2008 5 years
CBERS-4 2011 5 years
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
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
CBERS-2
Work Share (70% China, 30% Brazil)
Service Module
Structure BrasilThermal Control
ChinaAttitude and Orbit Control ChinaPower supply BrasilOn-board computer ChinaTelemetry Brasil
Payload Module
CCDChina
IRMSSChina
WFI BrasilData Transmission ChinaData collection Brasil
CBERS-2 being put into Long March-4B
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
CBERS-2 Launch(21 October 2003)
CBERS-2
CBERS-2 Orbits
CBERS 1,2, 2B Sensor Configuration
m0.4 2.50.
71.10.
90.5 1.5 1.7 2.3
WFI 260 m (890 km)
MSS 80 m (120 km)CCD 20 m (120 km)
Built by China Built by Brazil
CBERS-1,2, 2B Sensor ConfigurationSensor Bands (m) Swath (km) Resolution (m)
CCD 0.45-0.52 120 20
0.52–0.59 120 20
0.63–0.69 120 20
0.77–0.89 120 20
0.51-0.73 120 20
IRMSS 0.76-1.10 120 80
1.55–1.75 120 80
2.08–2.35 120 80
10.4–12.5 120 160
WFI 0.63–0.69 890 260
0.77–0.89 890 260
Image CBERS-2 WFI
CBERS2-WFI – 157/124, 18/01/2004, São Paulo
WFI sensor
CBERS2-WFI – 157/124, 10/03/2004, São Paulo
WFI sensor
CB2-IRM-157/123, 18/01/2004 10/03/2004
CB2-CCDCB2-CCD
CBERS-2 IRMSS (Rio Preto, Brazil)
CB2-IRM-157/124, 24/3/2004, Catanduva (Brazil)
IRMSS sensor
CBERS2 - IRMSS x CCD (Maringá, Brazil)
CB2-IRM-159/126, 30-03-2004 CB2-CCD-159/126, 30-03-2004
CBERS-2 CCD, Minas Gerais, Brazil
CB2 – CCD 156/121- 4/11/2003 – Brazil
CBERS-2 CCD Sobradinho Dam, Brazil Dez 2003
CBERS-2 CCD, Parnaíba River Delta, Nov 2003
CBERS-2 CCD Manaus, Brazil, Dec 2003
CBERS-2 CCD, Pradópolis, Brazil, Nov 2003
CBERS 3 – 4 Sensor Configuration
m
0.4 2.30.7
1.10.9
0.5 1.5 1.7 2.1
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)
Built by China Built by Brazil
Launch Date
Res (m)
2004 2005 2006 2007 2008 2009 2010
LANDSAT5 1984 30
LANDSAT8 2008? 25
HRV/SPOT4 1998 10/20
HRV/SPOT5 2002 20
CCDCBERS-2
2003 20
CCDCBERS-2B
2006 20
CCDCBERS-3
2007 20
LISS-3IRS-P6
2003 23
Optical Sensors (Medium Resolution, Global Coverage)
Swath (km)
Res (m)
2004 2005 2006 2007 2008 2009 2010
MODIS (TERRA AQUA)
2500 250 2001
VEGETATION (SPOT-4/5)
2500 1000 2003
MERIS (ENVISAT) 1100 300 2002
WFI (CBERS2 CBERS2B)
890 260 2003
AWFIS (IRS) 700 65 2003
AWFI (CBERS-3) 750 70 2008
Optical Sensors (Large Swath, High Temporal Resolution)
CBERS 3/4 x LANDSAT-8
m0.4 2.30.
71.10.
90.5 1.5 1.7 2.1
CCD 20 m (120 km)MUX 10 m (60 km)
PAN 5 m (60 km)
PAN 15 m (180 km)
TM 30 m (180 km)
MSS 40 m (120 km)
WFI 73 m (860 km)
CBERS 3/4 x IRS-P6 e IRS-P5
m0.4 2.30.
71.10.
90.5 1.5 1.7 2.1
CCD 20 m (120 km)MUX 10 m (60 km)
PAN 5 m (60 km)
PAN 2.5 m (30 km - stereo)
LISS 23 m (140 km)
MSS 40 m (120 km)
WFI 73 m (860 km)
MSS 5.8 m (24 km)
AWFIS 70 m (700 km)
CBERS Ground Station
Reception &Recording System
Quality Control System
Product Generation System
Catalogue Browse System
Order Management System
Acquisition Planning System
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
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
CBERS Image Distribution in Brazil (May to August 2004)
Total number of full CCD scenes distributed (145 Gb/scene)
22,460
Number of users 4960
Number of scenes produced per week 2115
Average time to process a user request 12 min
Production environment 8 PCs/Linux
FTP area for User
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
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
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
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