As a main element of China second generation of geostationary meteorological satellite Fengyun 4B (FY-4B), which was launched on Jun. 03, 2021, the Geostationary High-speed Imager (GHI) is the first round the clock high-frequency imaging instrument working on the international geo-stationary orbit. It can continuously observant and imagine for 2000km×2000km regions with spatial resolution up to 250m in 1 minute interval. The challenge of GHI thermal design was that the sun intrusion of the optic system would induce destabilization of the internal temperature field. It conflicted with the target of the GHI thermal system, which should ensure small temperature difference between two sides of scanner shrouds (less than 3K), the low temperature gradient of optical mounting platform (less than 2K), and high precision temperature control (±0.1K) of blackbody. This paper described the control strategy and requirements of the GHI thermal system, which successfully performs all phases of the mission. The on-orbit data showed that the instrument maintained a stable internal thermal environment when optical system exposed to external heat flux disturbances in mid-night.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.