China News Service, Shanghai, April 16th: "Working in space" has a coup, the world's first laser carbon dioxide detection satellite was successfully launched
Author Zheng Yingying Ma Shuaisha
The world's first laser carbon dioxide detection satellite, the atmospheric environment monitoring satellite, was successfully launched on the 16th. Its "car" is the Long March 4 Bingyao 28 carrier rocket.
Satellites and rockets are all developed by the Eighth Academy of China Aerospace Science and Technology Corporation.
The atmospheric environment monitoring satellite is the world's first satellite capable of laser carbon dioxide detection, which can greatly improve the global carbon monitoring and atmospheric pollution monitoring capabilities, and its working method is also somewhat different.
Satellite renderings courtesy of the Eighth Academy of China Aerospace Science and Technology Corporation
5 passengers have "horizontal" work
The satellite has 5 "passengers": a high-precision polarization scanner, a multi-angle polarization imager, an ultra-violet hyperspectral atmospheric composition detector, a wide-field imaging spectrometer, which are four passive detection payloads, and the first time in the world to carry an atmospheric detection laser Radar is an active detection payload.
The launch weight of the whole satellite is about 2,600 kilograms, of which the main load of the atmospheric detection lidar mounted on the top of the satellite weighs 870 kilograms.
How to make "top-heavy" satellites achieve high-precision detection?
The structure development team of the No. 509 Institute of the Eighth Academy of China Aerospace Science and Technology Corporation adopted the design plan of "the lidar is installed horizontally on the top of the satellite platform". At the same time of the platform height, it provides the optimal mechanical environment for the main load.
Always receive orders with a "smartphone"
The answering machine is like a satellite's "smart phone", allowing the satellite to "answer" the ground's commands at all times, and to tell the ground its location and "health".
When buying a "smart phone", of course, high performance and high reliability are required.
The satellite's measurement and control system USB (full name: unified S-band) transponder can cooperate with the ground station to complete satellite remote control, telemetry, communication and other functions. It only takes 32 milliseconds to complete the rapid capture and demodulation of remote control and ranging signals. Wait.
In addition, this answering machine is also a "generalist" and is designed to be versatile.
From low orbit to high orbit, it can cover the common USB system measurement and control requirements of earth-orbiting spacecraft.
Expedited "delivery" with "courier brother"
How is the data on the satellite transmitted?
The integrated data transmission processor is like a dedicated "courier", and the various payload data on the satellite are like "cargoes" coming from all directions.
At 2:16 on April 16, the Long March 4 Bingyao 28 carrier rocket successfully launched the atmospheric environment monitoring satellite at the Taiyuan Satellite Launch Center Photo by Wu Jingbo
When a large amount of load data floods into the processor, the integrated data transmission processor encodes in an orderly manner according to the principle of "first in, first out". When full load is achieved, the dispatch center will give a "start" command to transfer these loads to the storage space to achieve faster, more accurate and more flexible data transmission.
The high-speed real-time link facilitates "expedited delivery", which means that the satellite's integrated data transmission processor breaks the traditional design and can achieve rapid retrieval of key data when transmitting loads of different rates at high speed.
When the satellite flies over the Chinese ground station, it can transmit data to the ground station in real time, that is to say, the "courier" can expeditiously deliver the "load express" to customers on the ground.
(Finish)