HY-1 satellite and its application in China
2. HY-1 satellite characteristics and ground system
2. 1 satellite characteristics
The main use of HY-1 is to detect the marine environmental parameters of the China Seas,
including chlorophyll concentration, suspended sediment concentration, and dissolved organic
matter, pollutants, as well as sea surface temperature. The satellite will play an important role in
developing and utilizing the marine bio-resources, constructing and managing the harbor,
detecting the ocean pollution, investigating and developing coastal resources and studying the
global environmental changes.
HY-1 satellite main characteristics are listed in table 1:
Table 1: Satellite and Orbit Characteristics
There are two sensors on the HY-1 satellite, the COCTS is an optical radiometer to detect ocean
color and surface temperature. COCTS has a function to detect the amount of chlorophyll and
dissolved substances in the water, and temperature distribution. The data of COCTS will be used
to get the information of ocean conditions for fishery and environment monitoring. Its repeat
period is 3 days. There are 8-channel visible and near-infrared band and 2-channel thermal
infrared band with the spatial resolution of 1.1km. The CCD is a medium spatial resolution
optical sensor for observing ocean color, land and coastal zones. CCD has 4 spectral bands from
0.42-0.89µm with spatial resolution of 250m. The CCD data will be used for regional mapping
of different water constituents and vegetation, monitoring pollution of coastal zones for resource
exploration etc. Its repeat period is 7 days. The main characteristics are summarized in table 2. 3. 4.
2.2 The ground system
The HY-1 satellite ground system consists of components for data receiving and preprocessing,
data processing, data archiving and distribution, calibration and validation, communication,
operation control and application and demonstration subsystem. NSOAS is responsible for
marking the satellite observation schedule, real-time receiving and processing archiving and
distribution of HY-1 satellite information products for marine environmental parameters forecast
operational.
There are four Level data product types after processed for HY-1satellite as table 5
Table 5 HY-1 satellite data product types
