The U.S. "breakingdefense" website reported on October 28 that in July 2021, the space surveillance satellite code-named "America 271", jointly developed by the U.S. Air Force and the American Orbital Science Corporation, tried to approach China's heaviest and most advanced satellite to date, the Shi-20 satellite, and China discovered the approaching U.S. satellite in only 1 day, and then demonstrated the ability to track and manipulate the satellite with extreme precision. Rapidly perform orbit-changing maneuvers away from U.S. satellites.
The United States has the strongest missile warning and space surveillance capabilities in the world, and even at its peak, the Soviet Union could not compare with its space surveillance capabilities. The economic and military superiority and normal operation of the United States are extremely dependent on its numerous space assets, and the United States believes that it needs a strong space control capability to use and protect its space assets and prevent the enemy from using space. Space monitoring ability, or space situational awareness ability, is an essential ability for space control.
U.S. 271 is part of the U.S. Space Situational Awareness Program in Geosynchronous Orbit. The satellite carries photoelectric sensors, which are specially used to monitor other countries' satellites in space and collect data intelligence on other countries' satellites.
The Space Situational Awareness Program (GSSAP) satellites in geosynchronous orbit are a series of satellites working in near geo orbit that serve as space-based sensors for the U.S. Military's Space Surveillance Network to support Strategic Command's space surveillance operations.
Currently, the GSSAP constellation has 4 moons in orbit. The first pair of GSSAP satellites (numbered USA 253, 2014-043a; usa 254, 2014-043b) was launched on July 28, 2014, with the U.S. military declaring it initial operational capability on September 29, 2015, and the second pair of satellites (usa 270, 2016-052a; usa 271, 2016-052b) launched on August 19, 2016 and entered operational status on September 12, 2017 A third pair of satellites is expected to launch in 2020. The GSSAP satellite is supported by the U.S. Air Force Satellite Control Network Ground Station, and its day-to-day operations are handled by the 1st Space Operations Squadron of the 50th Space Wing. The GSSAP remained highly classified until early 2014, when the Air Force acknowledged the program's existence, but detailed technical indicators and details remained confidential.
China and Russia have always been the main targets of GSSAP surveillance, as early as 2016, the United States used the GSSAP satellite to monitor China's communications technology experimental satellite-1.
The object of the United States surveillance is the "Shidi-20" satellite, as a test satellite based on the Dongfanghong No. 5 satellite platform, the Shijian No. 20 satellite is currently developed in China's geosynchronous orbit launch weight of the satellite, the satellite carries the q / v frequency band very high flux communication payload, laser communication, cryogenic loop and other more than a dozen with the international leading level of advanced payloads, many of which are domestic and even the world's first.
The Shijian-20 satellite will complete the first 5.5 GHz bandwidth q/v frequency band satellite communication experiment, opening up a new field for the frequency space of the current geostationary orbit communication satellite. In addition, the satellite will carry out the laser communication test of the high-orbit coherence system for the first time, which has higher sensitivity, faster rate and stronger anti-interference ability than the direct detection system, with a maximum rate of 10gbps, refreshing the new index of the laser communication rate in geostationary orbit.
It is precisely because the "Shijian-20" satellite has the international leading communication technology, so the "American 271" space surveillance satellite has to listen to the "Shijian-20" satellite, and even only 30 meters away from the "Shijian-20" satellite.
The reason why it is so close is because the practice of no. 20 verifies the international cutting-edge communication technology, and the communication link between the stars and the earth contains a large amount of confidential information, and once the United States successfully obtains it, China's core secrets will be leaked.
However, the beam of communication between Practice 20 and the ground is very narrow, and you can't receive it when you are far away, so the space surveillance satellite of "American 271" will be so close, so that it can not only rub the 5.5ghz bandwidth q/v band signal, but even may receive the laser communication beam emitted by the ground station.
However, the "Shijian-20" satellite has changed orbit and avoided, and the "Shijian-20" satellite adopts a hybrid propulsion system, which is provided by chemical propulsion and electric propulsion.
The chemical propulsion force is large and inefficient, which is suitable for rapid orbit change and adjustment of satellite attitude, and sends the satellite into the established working orbit as soon as possible; The electric propulsion force is small, but the thrust accuracy is high and the efficiency is high, which is suitable for long-term accurate track adjustment in orbit.
This also allows China to quickly carry out orbit-changing maneuvers away from U.S. satellites with extremely high precision after discovering U.S. satellite surveillance and maneuvering satellites.
And China's behavior, which makes the United States very angry, because China can change orbit so easily and quickly, which means that China's space technology capabilities have reached the international leading level, the United States believes that China's technology will pose a great threat to the United States, so the United States directly turned a rake, claiming that This flexible and high-precision space perception and manipulation ability displayed by China may be used for "evil or threatening things."
Data show that the US space surveillance satellites show extremely high attention to China's geosynchronous orbit satellites, and the number of close surveillance is ranked first among all countries, posing a great threat to China's space security. Now it is spreading rumors that China has bad intentions, and the United States can be said to be shameless to the extreme.