Beijing No. 3 B Satellite Tianshu Camera: "Thousands of Eyes" of "Bright Eyes"

Beijing No. 3 B Satellite Three -dimensional rendering map Aerospace Technology Group Fifth Hospital provided

On August 24, 2022, Beijing No. 3 B Satellite was successfully lifted off at the Taiyuan Satellite Launch Center and successfully entered. The satellite is loaded with a 0.5 -meter -level high -resolution Tianshu camera developed by 508 developed by the Fifth Hospital of Aerospace Science and Technology Group. This is a high -end flagship product in the Beijing No. 3 series satellite camera. Environmental monitoring, emergency management, and food security are important areas of national economy and people's livelihood.

"For thousands of miles, go to the next level." At a high altitude of more than 600 kilometers, Tianshu camera can not only see the vast land of the motherland, but also see the world scenery.

You can also "inspect the autumn" thousands of miles away

Beijing No. 3 B Satellite Tianshu Camera's vision is sharp, which can be described as "Ming Qiuqiu" -it can identify the target of 0.5 meters away thousands of miles away, such as the windshield of the front and rear of the car, the zebra crossing on the road, parking The lines of the position, the figures on the square, etc., can be described as a veritable "thousands of miles".

In terms of forestry management, Tianshu camera can distinguish a single tree crown, accurately evaluate forest fire loss, and effectively monitor illegal logging. In terms of agricultural management, it can achieve precise evaluation of crop planting area and enhance the variety of plants. In terms of urban construction, it can timely discover illegal buildings and land for illegal use.

Beijing No. 3 B Satellite Tianshu Camera Development Pictures Aerospace Technology Group Fifth Academy provided

Compared with the Beijing No. 3 Satellite Satellite Camera, B Satellite Tianshu Camera has a larger diameter, brighter, and more performance. Wang Jinqiang, the manager of the Tianshu camera project of the 508 House of Aerospace Science and Technology Group, introduced that the Tianshu camera uses an ultra -long focal length optical lens, and the resolution has reached the highest level of domestic business remote sensing. "The scorching surface of the camera uses a domestic high -performance multi -spectrum TDICMOS line array, which can be scanned like a scanner; in addition, the camera is also equipped with a low -noise CMOS noodle array scoring surface, which can achieve format imaging like a SLR camera. Smooth video imaging. "

The image quality of "Setting on the body"

Imaging quality is the foundation of the aerospace camera. To this end, on the basis of the excellent resolution ability of the "Tiansheng Camera", the development team has redesigned more optical lenses with stronger performance and upgraded evolutionary imaging capabilities.

Regarding this series of requirements and solutions, Hu Yongli, chief designer of the 508 camera of the Fifth Hospital of Aerospace Science and Technology Group, summarized it as:

The first is "standing high, far away, wide, and clear" - "Adaptation to higher tracks through growth focal length, Beijing No. 3 B satellite's orbit is more than 100 kilometers than satellite A, which is equivalent to imaging More than 100 kilometers away from the distance ";

The second is "width of the spectrum and many details" - "Brenden the full color imaging spectrum, absorb more spectral information, is more conducive to color fusion images, and color details are richer";

The third is "big eyes and good vision" - "Increasing the caliber of the main mirror, the large aperture lens can further improve the ability and resolution of collecting light";

The fourth is "looking at things, no deformation" - "optical system increases the abnormal optical element, which further eliminates the last residual distortion."

Vertical installation "without fear" of the gravity of the earth

When installing precision aerospace optical lenses, he is very afraid of the impact of ground gravity. Usually, the impact of dozens of wavelengths caused by gravity will cause the installation to fail. Compared with the Beijing No. 3 Satellite Satellite Camera, one of the biggest differences of B Satellite Tianshu camera is that the optical lens uses vertical installation technology. "Compared with the traditional horizontal installation, vertical installations are applicable to large -caliber cameras, which is more technical. Tianshu camera is just the beginning. Extracting vertical uniform adjustment technology can be adjusted for the larger caliber camera in my country in the future. Putting the road. "Jiao Wenchun, the person in charge of the 508 craftsmanship of the Fifth Hospital of Aerospace Science and Technology Group, told reporters.

Intelligent chip makes the camera "smarter and smarter"

Due to the use of a large number of advanced intelligent chips, the level of intelligence and autonomy has been greatly improved, so Tianshu camera "is more and more smart."

The Tianshu camera uses the same high -performance CPU as the satellite brain, which can achieve the best imaging parameters of intelligence, make the shooting easier, and have self -correction capabilities. At the same time, many intimate designs have greatly improved the handling performance of the camera. "For example, the memory calling function maintained by power -off keeps the adjustment of the adjustment of various parameters is not affected by the switching, and users can pay more attention to the shooting target; The video imaging of the noodles is to adapt to a variety of complex imaging modes of the satellite; the rapid driving capacity of the circuit can keep the best imaging parameters in the imaging process, and it can also be processed in real time. The data transmission rate of the Tianshu camera is more than doubled than that of the Tianda camera, and it can create a highway for data transmission ... "Hu Yongli said for example.

In addition, compared to the traditional ground artificial focus of the Tianyu camera, the Tianshu camera increases the automatic automatic focus function. "This can quickly adapt to different far and near targets. From dozens of kilometers of objects to hundreds of millions of kilometers of deep space celestial bodies, they can be clearly focused and convenient for users." Hu Yongli added.

Precision thermal control always guarantees "warmth like spring"

In the space of the universe, the cold and hot heat is the norm, and the temperature difference is extremely large. To this end, the development team uses multi -mode temperature control technology to allow the lens of Tianshu camera to always be at the best imaging temperature. In this way, it not only ensures the geometric quality of the imaging, but also saves nearly 200 watts of thermal control power consumption. It is reported that while the precision thermal control capability allows the camera to serve its own lens, it can also protect the "neighbors" well, so that the astrimen brackets, micro -gyroscopes, etc. installed on the camera subject are in a stable temperature state -these The geometric positioning accuracy of the camera image of the module relationship is protected by the high imaging quality of the camera.

"Steady Ruoying" anti -shake and peaceful shot

For high -resolution imaging at a level of 0.5 meters, extremely small jitter will significantly affect the quality of imaging. Therefore, to take clear images, you must work hard up and down.

The research team puts the camera on the satellite platform with three groups of controlling rods similar to suspended places, which can effectively isolate the micro vibration of satellite motion components. Under the real -time control of the posture control system, the camera is guaranteed to be "steady." Shake at peace and shoot.

In order to explore the shock absorption effect, the technical team also specifically developed a micro vibration tremor vibration measurement system that can measure the small vibration of each optical element during the imaging and avoid it as much as possible.

Beijing No. 3 B Satellite Tianshu Camera Development Technology Team Aerospace Technology Group 5 provided

"Watch the intent" high machine "space live broadcast"

Because the focus surface increases the noodle detector, the Tianshu camera has a popular video imaging function, and it can be automatically exposed. The recorded video is naturally and free. "Using the satellite posture control ability, you can hold the target 'holding stare and the eye -catching. The wonderful moment. "Hu Yongli said.

It can be seen that as "breaking the imagination", many innovative technologies of Tianshu camera have made the "high precision" of the remote sensing satellite reached a new level. (Guangming Daily All -Media reporter Zhang Lei, correspondent Zhu Zhihao, Chen Xi, Hu Yongli, Li Li)

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