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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

CAST Report on Cal/Val Activities - CEOSceos.org/document_management/Working_Groups/WGC… ·  · 2015-08-26Chang’e-5 test module … Expected in 2015 Telecommunications ... SUPARCO

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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