China News Service, June 10 (Zheng Yingying, Guo Chaokai) According to a news released by the Eighth Academy of China Aerospace Science and Technology Corporation on the evening of the 10th, one week after launch, the Fengyun-4 02 satellite was successfully set at 17:07 on June 10th. The geostationary orbit position above the equator at 123.5 degrees east longitude was officially named Fengyun-4B.
Photo courtesy of the Eighth Academy of China Aerospace Science and Technology Corporation
The reason why meteorological satellites are called "the first line of defense for disaster prevention and mitigation" by the industry is that the remote sensing data detected by satellites is the first-hand information for monitoring and predicting the development and trend of severe weather.
Satellite remote sensing data is particularly important when severe weather occurs.
The Fengyun-4B satellite adopts a number of technologies such as frequency bands that are not sensitive to severe weather, GMSK modulation, LDPC encoding, and reasonable link design to ensure that data transmission is not afraid of typhoons and rains, and can be transmitted to the ground stably and reliably. Station, so as to "wear through violent storms and rain, without touching one's body", so as to assist meteorological units to make accurate weather forecasts and reduce possible losses caused by severe weather.
In addition, the FY-4B star is also a "fast" carrier.
Using the satellite-to-ground high-speed data system, the Fengyun-4B satellite remote sensing load acquires remote sensing data and sends the data to the ground data transmission sub-system for processing in real time, and then transmits the data to the ground data through the satellite-to-ground high-speed data transmission channel Central station.
Then, through the high-speed information forwarding (HRIT) channel and low-speed information forwarding (LRIT) channel of the satellite-to-ground forwarding system, high-frequency meteorological products were quickly distributed to fixed weather stations and satellite coverage areas at all levels in China’s provinces, cities, and counties. Vehicle-mounted and ship-borne mobile receiving terminals.
According to reports, it only takes a few minutes to use the satellite-to-ground high-speed data system to obtain remote sensing data from the remote sensing load until the meteorological product reaches the end user.