After the spacecraft returns to Earth, how can it quickly find the return capsule?

After the spacecraft mission is completed, the astronauts will take the return capsule and return to the ground from space two hundred kilometers away from the ground. So, how do the ground workers quickly find the location of the return capsule? There are at least three ways to quickly find the spacecraft's return capsule:

The Shenzhou spacecraft uses a three-cabin section, which is composed of a return capsule, an orbital module, a propulsion module and an additional section, and is composed of 13 subsystems. The Shenzhou series of passenger spacecrafts are launched on the Long March 2F rocket specially developed for them. The launch base is the Jiuquan Satellite Launch Center and the recycling address is the Siziwang Banner Aerospace Landing Site in the middle of Inner Mongolia.

How to find the spacecraft return capsule after the spacecraft returns

1. Arrange radar on the return trajectory of the spacecraft

To ensure that the astronaut rescue team pays immediate attention When the return capsule returns to the ground, in addition to arranging a certain number of radars on the return trajectory of the spacecraft to track and measure the trajectory of the return capsule and predict the location of the impact point, the return capsule is also equipped with landing marking equipment that independently marks its own position to inform Rescue workers "I'm here". The landing positioning equipment on the return capsule is mainly to push wireless communication equipment with frequencies and formats required by the international rescue organization. It mainly includes low-frequency treatment device beacons. Low-frequency treatment device communication equipment. International search and rescue position indicating beacons, etc.

2. The "shoulder" position of the return capsule is equipped with a photo flash

To facilitate the search for the return capsule at night, the return capsule is equipped with a photo flash at the "shoulder" position, from which the helicopter Can detect the return capsule 3 to 5 kilometers away at night

3. The bottom of the return capsule is equipped with sea surface dye

When the return capsule is scattered on the water, it will be caught in the rolling waves. In the sea, return capsules with a diameter less than 3 meters are even more difficult to detect. In order to guide the airport and rescue ships to retrieve the return capsule, a sea surface dye is installed at the "bottom" of the return capsule. When the return capsule falls into the sea, the sea surface will The dye will be released slowly, dyeing the surrounding river surface bright green, and the delay time can be up to 4 hours.

The main parachute of the return capsule is made of highly saturated inscribed round balloon flowers, and the color combination of the stripes can be selected according to the ground environment during the return season of the spacecraft. The use of this kind of glider, which is quite different from the ground environment, can increase the detection distance above the return capsule.