WGCV 39 th Plenary May 6-8 Berlin, German CAST Report on Cal/Val Activities CAST( China Academy of Space Technology) WGCV Plenary # 39 Berlin May 6 - 8, 2015
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
WGCV 39th Plenary May 6-8 Berlin, German
CAST Report on Cal/Val Activities
CAST( China Academy of Space Technology)
WGCV Plenary # 39
Berlin
May 6 - 8, 2015
Summary
1 Overview of CAST
2 Calibration of CAST
3 Latest programs
Overview of CAST
CAST Key Member
of CASC
Organization
CGWIC
ALIT
CSCC
Commercial Trading Company
China’s Sole Satellite Operator
Defense Trading Company
CALT
CASC
AASPT AALPT SCAIC CAAET
…
SAST
Core Business
Science Exploration
Navigation
Manned Spaceflight
Remote Sensing
Telecommunications
Business Breakdown 2014
Space 67%
Spin-off 28%
Others 5%
Telecommunications 16%
Remote Sensing 33% Navigation
9%
Science Exploration
18%
Human Spaceflights
9%
Meteorological 3%
Others 12%
Satellite Application 54%
Electronic Information Systems
25%
Advanced Materials and Related applications
4%
Equipment 3%
Energy Conservation and Environment
Protection 14%
Management Group
Zhang Hongtai President & CEO
Li Kaimin ESVP
HR
Liu Fang SVP
Telecom & Navi
Shang Zhi SVP RS
Yu Houman SVP PA
Li Zhongbao SVP
Defense & Spin-off Liu Xudong
CFO
Li Ming SVP R&D
Wang Zhongyang SVP CIO
24 000 Employees 15 subsidiaries in 7 cities 4. 55 Billion USD revenue in 2014
Key Figures
Space: 14 000 average age: 34
Key Player in Global
Space Industry
15 subsidiaries in 7 cities 3 Representative Offices Abroad
Lan Zhou 1809 people
Tianjin 1257 people
Beijing 16036 people
Yantai 1196 people
Inner Mongolia 583peeople
Shen Zhen 133 people
CAST Xi’an 2672 people
CAST industrial footprint
Paris
Munich
St Jose
Space Segments
We design, build and deliver end-to-end space systems:
168 spacecrafts delivered
88 spacecrafts in orbit
Providing worldwide customers with full range of space to ground solutions
Turnkey Solutions
Telecommunications Prime contractor for over 30 telecommunications satellites
• Consultation
• Orbit Frequency Coordination Support
• System Design & Integration
• Satellite Manufacture
• Launch and In-orbit Operation Support
• KHTT
Mature DFH platform series for
telecommunication, broadcast and
customized missions
Reliable and customized payloads
Remote Sensing Core Player for over 80 Remote Sensing Satellites
Space to Ground turnkey solutions Versatile LEO/SSO/GEO satellites and constellations High performance and innovative bus & payloads Reliable ground application system
The 1st generation: 4 satellites
The 2nd generation:
16 satellites offers regional services for Asia-Pacific area by 2012.
35 satellites will offer global coverage by 2020.
Beidou navigation satellite applications
Navigation Prime constructor of China’s Beidou Navigation Satellite System
Intelligent transportation
Disaster Relief
Emergency Command & Control
National security
Precise Timing
Prime contractor of China’s Lunar & Mars Exploration Program
Space Science Exploration A prime in China’s Space Science Exploration Missions by delivering over 15 satellites
CAST carries out lunar exploration by three steps. Orbiting Orbiting around the moon Landing Soft-landing on the moon surface Returning Sample collection of moon surface and returning to the Earth
China’s Manned Space Program is implemented by three steps.
STEP 2
STEP 3
STEP 1
Manned Space Flight
EVA, rendezvous & docking
70-ton Space station
Human Space Flight Founder of China’s Manned Space Program Successfully launched 10 Shenzhou spaceships and 1 Space Lab, will build China’s first space station
2014 Remote Sensing (14 in total) SJ-06/07/08 GF-2 YG-20A/B/C YG-21 YG-24 YG-25A/B/C CBERS-04 Science Chang’e-5 test module …
Expected in 2015 Telecommunications (3 in total) APSTAR-9 Laosat -1 Remote Sensing (9 in total) GF-4 Navigation (2 in total) Pico & Nano (8 in total) …
Launches 2014/2015
Global Partners of CAST
CNES ISS DLR ESA Eutelsat SSC
SES TAS ADS Turksat
MDA COM DEV ITL
ASAL NASRDA NARSS Nigcomsat
ABE ABAE INPE CONAE
SUPARCO Arabsat NTS BASARNAS LAPAN BAKAMLA GISTDA MOSTI KACST Supremesat
Introduction of CAST's Calibration activities
Calibration of CAST
• GF-1（Pan/MS） • GF-2（Pan/MS） • ZY1-02C/04C（Pan/MS） • ZY3（Pan/MS） • HJ-1A/1B/1C（Pan/MS） • SJ-9（Pan/MS） • HY1B（Pan/MS） • FY-3（HSI） • GF-5（Pan/MS/HSI） • ……
Various Cal sites Various Sensors
• Dunhuang • Yili • Baotou • Hami • Huailai • Heihe • Songshan • ...
Establishing various cal & val sites in China and abroad
Providing consistent sensor calibration service including Pan, MS and HIS
Calibration service for clients can be included in turn-key solutions by CAST
Calibration
Validation
Professional Team
Integrating sphere system:
Uniformity: >99% Angle: >30o
Diameter: 4m
Calibrated sensor's diameter: 1.6m( suit for China's largest camera)
Levels: 32
Pre-launch radiometric calibration
Integrating sphere
Integrating sphere with large diameter( D=4m)
Collimator with long focus(f=50m)
Blackbody with large diameter
Repeatable test, including thermal vacuum test, vibration test……
Pre-launch radiometric calibration
Blackbody Collimator
Advanced Instruments
Innovative Methods Higher precision
Interior orientations testing instrument
Accuracy of 2D revolving table: 1"
for Horizon and 2" for pitch
Photoelectric goniometer: 0.02"
Sub-pixel center position: 1/14pixel
1:5000 mapping cameras
Camera: f:20m D:1m
ZY-3 Higher precision
Pre-launch geometric calibration
• statistical methods and pre-launch data to improve the accuracy of relative
radiometric calibration
• Multiple bar-pattern with different reflectivity to improve the accuracy of
absolute radiometric calibration
• Various calibration sites
Various Calibration Sites
In-orbit radiometric calibration
Bar-pattern target
Calibration method:
• a step-by-step calibration model
• Interior Calibration + Exterior Calibration
Geometric calibration parameter：
• Exterior orientation elements
• Interior orientation elements in every imaging CCD array
• Each linear array geometrical relationship in camera
• Camera geometrical relationship in satellite platform
Songshan cal site • 50km *40 km
Yili cal site • 120km *30 km
Calibration period: 3 months Accuracy: sub-pixel
In-orbit geometric calibration
Latest Cal/Val activities of CAST
ZY-3 satellite
various targets
In-orbit calibration ( with CSIRO )
Stereometric mapping：EO
mode + Surveying mode
Assess for the stability of
intersection angle
Bar-pattern targets with
2400m2 coverage
Accuracy of relative
radiometric calibration: ~1%
Accuracy of absolute
radiometric calibration: <7%
Launch date: 2014.8
GSD: 0.8 m @ 631.5km
SWATH: 45 km
1 Pan and 4 MS bands covered 450nm-900nm
Accuracy of relative radiometric calibration: <1%
GF-2 satellite
• Pre-launch calibration
Linearity of GF2 B-camera @B1 band
GF-2 1m4m正样B相机 B1谱段响应线性
R2 = 0.99991
R2 = 0.99994
y = 2.72504 x - 2.07202
R2 = 0.99990
R2 = 0.99992
R2 = 0.99972
0
200
400
600
800
1000
0 50 100 150 200 250 300 350
等效辐亮度(W•m-2•sr-1•μm－1)
输出DN平均值
T0AA_Stage4_ZY4_C0T0AA_Stage4_ZY3_C0默认T0AA_Stage4_ZY2_C0T0AA_Stage4_ZY1_C0T0AA_Stage3_ZY2_C0
Spectral radiance standard integrating
sphere
Spectroradiometer
Light Source
Sensor
HTBB /FPBB
Crygenic radiometer
Trap detector
Filter radiometer
HTBB
Standard lamp
Diagram of radiometric calibration
Aberration of GF2 A-camera @Pan band
• In-orbit calibration
Coverage of cal site
MSS image and control points
Accuracy of relative radiometric
calibration: <1%
Accuracy of absolute radiometric
calibration: <7%
Accuracy of internal geometric
calibration:
Along track 1.3m
Across track 0.7m
Cal site
GF-2 satellite
1st GEO high resolution satellite in China
GSD:50m
Swath: 500km-500km
Bands: 1 Pan +4 Ms+ 1 Infrared
Launch date: 2015
Pre-launch calibration has been completed. The in orbit test and
calibration will be finished in 2016.
GF-4 satellite
Integrating sphere
AI
Rolling device
Spectro-radiometer
freeze-point blackbody
Field
stop
Hyperspectral Sensor Calibration （with TNO 0f Netherlands）
Absolute Radiometric Calibration Configuration
Collaboration
• Space Optical Instruments Joint Laboratory
• atmospheric detection, deep space exploration……
Hyperspectral Sensor
• The error of the spectral calibration : <0.005nm
• Launch date: 2016
+Z
+X
+Y
顶部结构布局
底部结构布局
主承力复材基板
Hyperspectral sensor for atmosphere detection
GF-5 satellite
31 31
Land Observation
Ocean Observation
Territory Mapping
Disaster/Environment Monitoring
Atmosphere Detection
Deep Space Exploration
Future Plan More optical remote sensors
More challenges
More expectations
More collaboration
• Land Observation
• Ocean Observation
• Territory Mapping
• Disaster/Environment Monitoring
• Atmosphere Detection
• Deep Space Exploration
• Scientific Experiment
• ……
China Academy of Space Technology
LET’S WORK TOGETHER
CREATING A BETTER FUTURE
Related Documents
