China's highest resolution civil optical remote sensing satellite launched

According to the National Space Administration, at 11:10 on July 3, 2020, China successfully launched a high-resolution multimode integrated imaging satellite with the long march 4B carrier rocket at the Taiyuan Satellite Launch Center.
The launched high-resolution multi-mode integrated imaging satellite was developed by the Fifth Academy of China Aerospace Science and Technology Group Co., Ltd. High resolution multimode integrated imaging satellite is the first optical remote sensing satellite with sub meter resolution and multiple agile imaging modes in China. It will be mainly used to obtain high-resolution images of China's territory and surrounding areas. This is a civil optical remote sensing satellite with sub meter resolution, which can switch multiple imaging modes. Its on orbit application will further improve the technical level of remote sensing satellite in China, and meet the needs of relevant industry user departments for high-precision remote sensing image data.
Satellites mainly serve natural resources, disaster reduction and emergency response, agriculture and rural areas, ecological environment, housing construction, forestry, grassland and other industries, which will break the monopoly of international commercial remote sensing satellite companies on the sub meter resolution remote sensing image market.
High resolution multi-mode satellite is the highest resolution optical remote sensing satellite in the national medium and long term development plan for civil space infrastructure (2015-2025). It was established in 2018 and implemented in PPP mode. The satellite uses the public platform of medium-sized agile remote sensing satellite, which is equipped with high-resolution camera, atmospheric synchro corrector and other business loads, as well as laser communication terminal test load, and runs in the sun synchronous orbit.
During on orbit operation, the high resolution multi-mode satellite will verify agile maneuver control, agile imaging, image processing and other technologies, and realize the functions of image on orbit cloud judgment, specific area target extraction and so on. In the future, the satellite will be widely used in surveying and mapping, agriculture, environmental protection, forestry and other industries to further meet the needs of high-precision data in natural resources, investigation and monitoring, development and utilization, geological exploration, emergency disaster reduction, agricultural investigation, housing construction monitoring, forestry protection and other fields.
The "Xibaipo" Youth Science Popularization satellite was also launched this time, which is mainly used for youth space science popularization education. The satellite is mainly equipped with programmable educational load, remote sensing camera load and space sky contrast experiment load, which can realize the function of returning ground image data, satellite remote sensing data and physical experiment data.
Xibaipo science popularization satellite (bay102) is a youth science popularization satellite jointly launched by China Aerospace Science and Technology International Exchange Center and No.1 Middle School of Luquan District, Shijiazhuang city. It is a 2U cube satellite, developed by aerospace Dongfanghong Satellite Co., Ltd., No.5 Academy of Aerospace Science and technology group. It mainly carries out remote sensing imaging, image voice data transmission, remote sensing and remote sensing On orbit programming and other technical tests.
For this mission, the satellite system was developed by the Fifth Academy of China Aerospace Science and technology group, and the rocket system was developed by the eighth Academy of China Aerospace Science and technology group. This is the 337th launch of the long march series of launch vehicles.
Next, let's learn more about the characteristics of high resolution multimode satellites.
Feature 1: high definition images can also be taken in haze
The large aperture, long focal length and high-resolution camera carried by the high resolution multi-mode satellite is equivalent to a "giant SLR camera" in space. It can take sub meter resolution panchromatic images and multi spectral images of deep blue, blue, green, yellow, red and other spectral bands with meter resolution, and ensure the image texture has high definition, Fully meet the needs of users.
It also has an important tool -- atmospheric synchro corrector. With this artifact, even in the haze weather, it can still be discerning, just like in the sunny day to capture high-definition images.
In addition to seeing clearly, the satellite can also see accurately. For example, in the task of emergency disaster reduction, it can quickly calculate the exact location of the affected roads, bridges and houses while taking photos of the affected areas, providing much more information for emergency relief work.
Feature 2: the efficiency of image acquisition is doubled
The high resolution multi-mode satellite adopts a new generation of medium-sized agile remote sensing satellite public platform, which has the ability of agile attitude maneuver.
Different from other satellite brothers with strong body and big head, it is slim and flexible.
When performing a task, the large moment control moment gyroscope can help it swing faster. The Sun Wing with high rigidity can protect it from injury during swing. The overall vibration isolation design can ensure its more stable operation.
This kind of super agile imaging ability makes its image acquisition efficiency particularly high, and the number of observations can be increased by 4 to 6 times compared with the general traditional satellites.
Professor Guo Peiji's team from the Key Laboratory of Soochow University has undertaken the research and development of the third mirror, splicing mirror and other core optical elements in the satellite camera, which has provided the foundation for the camera to achieve excellent optical performance and effectively ensured the imaging quality of Panchromatic and 8 multispectral segments. At the same time, the team also undertook the research and development of the splicing mirror for the camera subsystem of gaofen-7 satellite launched at 11:22 on November 3, 2019 at Taiyuan Satellite Launch Center, providing the foundation for the satellite's dual line array camera to achieve excellent optical performance and contributing to the development of China's remote sensing satellite technology.
Feature 3: rich imaging modes and matting
High resolution multimode satellite has abundant imaging modes.
The so-called "multi-mode" refers to a variety of imaging modes, including multi-point target imaging on the same orbit, multi strip collage imaging on the same orbit, multi angle imaging on the same orbit, stereo imaging on the same orbit, non track active push broom imaging, etc.
In addition, it has powerful self-management function, which can realize the planning of actions and instructions independently on orbit, simplify the ground operation and ensure its own safety. The satellite image data extraction and processing function can ensure that it can quickly "matting" according to the user's needs, which is convenient for users to use.
Feature 4: "versatile man" with extreme function
High resolution multi-mode satellite industry users include the Ministry of natural resources, the Ministry of emergency management, the Ministry of agriculture and rural areas, the Ministry of ecological environment, the Ministry of housing and urban rural development, the State Forestry and grassland administration, etc. image data will be applied to dozens of businesses in multiple industries.
In view of its extensive "circle of friends", some designers summed up its high-strength ability with doggerel: "one, two, three, four, five, gold, wood, water, fire and earth". Among them, gold refers to "all kinds of mineral resources can be seen at a glance", wood refers to "forest coverage at a glance", water refers to "environmental protection coast is indispensable", fire refers to "disaster reduction and emergency everything", soil refers to "land and housing construction at a glance".
This is a multi-mode satellite with high resolution. It is a versatile satellite with extreme functions. In orbit, high-speed multi-mode satellite can verify agile motion control and image processing technology. In the future, the satellite will be widely used in environmental protection, forestry, surveying and mapping, agriculture and other industries. It can also meet the needs of high-precision data such as natural resources research, utilization, geological survey, disaster reduction, survey, development, agricultural survey, as well as housing supervision and forest protection. The launch also carried the Xibaipo youth science communication satellite, which is mainly used for youth space science education. The satellite is mainly equipped with remote camera load, programmable teaching load and environment contrast experiment.
The launch satellite system was developed by China's five major Aerospace Science and technology groups, and the rocket system was developed by the eighth Academy of Aerospace Science and technology group. This is also the 337th time that the long march rocket has carried out its mission, which is not easy.