IEEE Geoscience and Remote Sensing Magazine - September 2015 - 116

disaster, resource and environment. It will rapidly promote international exchanges and corporations.

spectral resolution, achieving all-weather, all-day and
global coverage observation capability, providing operational applications and services in the fields of agriculture,

A. SyStem Overview
The CHEOS is mainly composed of space-based system
[9], ground system and application system, and creates an
integrated space-ground architecture engineering system
through innovating technologies and the mechanism.
The space-based system has observation approaches
as visible light, infrared, multi-spectrum, high spectrum,
microwave and laser etc., and implements the observational capability of high spatial, spectral, temporal resolution and high precision.
The ground system focuses on unified mission planning, operational management and control, global data
reception, centralized organization and management, unified sharing and distribution for satellite payloads, realizing data sharing and efficient product processing.

Table 1. The CheOS SaTelliTe SerieS and paylOadS.
SaTelliTe SenSOr
GF-1

GF-2

reSOluTiOn/
SwaTh widTh SpeCTrum

Panchromat- 2 m/60 km
ic camera

Single
spectrum

Multi-spectral camera

8 m/60 km

Blue/Green/
Red/
Near infrared

Camera
with wide
coverage

16 m/800 km

Blue/Green/
Red/
Near infrared

4 days

Panchromat- 0.8 m/45 km
ic camera

Single
spectrum

Multi-spectral camera

Blue/Green/
Red/
Near infrared

3.2 m/45 km

reviSiT
periOd

5 days

GF-3

Radar

SAR

GF-4

Multi-spectral camera

50 m

Multi-spectrum Minuteand infrared
level

GF-5

Multi-spectral camera,
imaging spectrograph, atmospheric GHG detector, VHF
infrared detector, differential
absorption spectrometer for
atmospheric trace gas, multiangle polarization detector

Visible, SWIR,
TIR, polarization, differential optical
absorption etc.

GF-6

Panchromatic camera

Single
spectrum

Multi-spectral camera

Visual and IR

GF-7

Three-Dimensional mapping
camera

Visual and IR

114°E

115°E

116°E

117°E

118°E

42°N

41°N

40°N

39°N

38°N
0.0-0.1
0.1-0.2
0.2-0.3
0.3-0.4
0.4-0.5
0.5-0.6

37°N

114°E 115°E
0 70 140

116°E 117°E 118°E
280
420

B. CHeOS SAtellite (GF) DevelOpment
Up to now, the project has successfully launched GF-1 and
GF-2 satellites, broken the bottleneck of high resolution
data acquisition technology, and provided effective support
for the enhancement of fine monitoring. GF-3 is a highresolution radar satellite, GF-4 is an optical geostationary
satellite, GF-5 is a high spectral and atmospheric observation satellite, GF-6 is a multi-spectral satellite and GF-7 is
a three-dimensional mapping satellite. These satellites are
planned to be launched and put into service before 2020.

C. AppliCAtiOn ACHievementS
CHEOS satellite data and products have played an
important role in the field of national economic
119°E 120°E
development and social progress such as land-use
planning, crop monitoring, forestry surveys, minN
eral resources monitoring, water conservancy (Fig.
42°N
5), and ecological environment, etc. Especially in
exploring advanced applications to frontier fields,
41°N
CHEOS would provide solid support from the following aspects as regional monitoring using GF-4
in minute level and monitoring of global green40°N
house gas, atmospheric trace gas and anthropogenic aerosols using GF-5. It boosts the transition
39°N
of satellite system from "focusing on research and
test" to "the balance between test and operation",
forms the Chinese characteristic remote-sensing
38°N
application system and products, and progres0.6-0.7
0.7-0.8
sively provides global services.
0.8-0.9
0.9-1.0
1.0-1.5

37°N

119°E 120°E
560
Km

FIGURE 5. Retrieved GF-1 aerosol optical depth seasonal average result over
Beijing-Tianjin-Hebei region for the first quarter of 2015.

116

IV. CHINA'S NATIONAL SPACE
INFRASTRUCTURE (CNSI) CONSTRUCTION
PLANNING
According to the infrastructure patterns, China has
proposed a plan of providing sustainable and stable
service of space-based systems. The resulting CNSI is
positioned to promote new technology innovation

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