The Seed Island Space Center is mainly composed of Takesaki Launch Site, Osaki Launch Site and Jixin Comprehensive Launch Site. The construction of Otsuka launch site started at 1969 and was completed at 1980, covering an area of about 7.6 square kilometers, located at 30 23 ′ 38 ″ north latitude and130 58 ′ 22 ″ east longitude. The launch site is mainly used to launch large liquid rockets, such as N rocket, H- 1 rocket, etc. 1975 began to be used, mainly for launching large liquid satellites. The modernization of Jixin comprehensive launch site is quite high, which can be compared with Hercules 3 launch site in Cape Canaveral. The launch site is mainly built to adapt to the launch of the new h-2 launch vehicle. 1In September 1975, the first H- 1 rocket took off from here and put 83kg Chrysanthemum satellite into orbit.
The launch facilities of Otsuka launch site mainly include launch pad, control center, rocket assembly workshop, propellant depot, engine static ignition test bench, weather station, etc. The construction of Jixin launch site started from 1985, and the service tower foundation project was basically completed by the end of 1986. The launch control center was built in August 1988, and the ignition test facility of Le7 engine was built in February 1988. Measurement and control center, power station, liquid oxygen, liquid hydrogen and high-pressure gas storage have also been built. The launch site is located in the northeast of Damu launch site.
1 km, built to adapt to the launch of the new H-2 launch vehicle.
The basic design requirements of Jixin launch site are: shortening the launch preparation period, reducing the operating cost, and launching two launch vehicles within 45 days; The design of the launch site is flexible, which is convenient for future reconstruction and expansion. In order to reflect the above requirements, parallel operation is adopted as far as possible in the design; Adopt automatic detection system (manual backup system); Using movable launcher and rocket assembly workshop, one rocket is assembled and the other rocket is ready to launch.
Jixin launch site is one of the largest and most modern launch sites in the world. It can be compared with Ariane 4 launch site in Kourou and Hercules 3 launch site in Cape Canaveral. Launch site cost 3? 300 million US dollars (1990 currency), and the main contractor is Mitsubishi Heavy Industries. It mainly consists of four working areas: solid motor storage and inspection area; Satellite preparation and assembly area; Launch vehicle assembly building area; Launch pad and service tower area. The main tasks of solid motor storage and inspection area are:
1) nondestructive testing and storage of booster;
2) Functional inspection of electromechanical system of booster.
The main tasks of the satellite preparation and assembly area are:
1) satellite assembly and inspection;
2) filling propellant and high-pressure gas;
3) Assembly of satellite, satellite connector and fairing.
The main tasks of the launch vehicle assembly plant area are:
1) erection and final assembly of booster;
2) Erect the core rocket and connect it with the booster;
3) subsystem and system inspection.
The main tasks of the launch pad and service tower area are:
1) high pressure leakage inspection;
2) the whole rocket system inspection;
3) drill (propellant filling test);
4) Add propellant and high-pressure gas, count down before launch, and launch.
The H-2 launch site was built for four years and then the ground facilities were verified for two years. H-2 rocket was successfully launched for the first time in February 1994.
H-2 rocket is vertically installed on the mobile launch platform in the assembly plant and transported to the launch base and service tower along the track. The mobile launch platform weighs 44 tons, is 22 meters wide and is 18 meters long. The distance from the ground to the top of the platform is 7 meters, and the maximum speed of the platform is 8 meters per minute. The platform is manufactured by Kawasaki Company.
The fixed service tower is 75m high and 30m wide. On both sides of the fixed service tower, there are two service towers that can rotate around a circular track. The left service tower is 75 meters high, which can approach the upper stage and payload of the rocket through the working platform. The right service tower is connected with the lower half of the fixed tower and can be close to the lower half of the rocket.
At the top of the service tower is a 100000 clean room. When the rocket is launched, the movable part of the service tower can rotate180 to inspect the rocket, and the tower can quickly return to its original position after the work is completed. The middle part of the service tower is an umbilical tower, and various electrical system and propellant system pipelines are installed in the umbilical tower.
The H-2 rocket assembly plant is 66 meters high, with a high-rise plant in front and a width of 27 meters. It has 13 working platforms. The low-rise workshop is at the back, 32 meters wide and 46 meters long. The assembly building was built by Kawasaki Heavy Industries.
The launch control center is near the assembly building. This is a circular building, which was built by Nippon Electric Company.
The communication between launch vehicle and control center mainly adopts optical fiber system. Therefore, both the command signal and the monitoring signal are digital. In addition, there is a hardware backup system for safety and emergency.
There is also a large rocket engine test-bed at the H-2 rocket launch site for testing the LE-7 liquid oxygen/liquid hydrogen engine. The test-bed is arranged near the launch facility in order to save costs. Liquid oxygen/liquid hydrogen storage facilities can be used for launch and test.
In addition, the 45-meter-high old test bench was rebuilt to test the solid rocket booster of the H-2 rocket. The launch site also includes facilities such as high-pressure gas, propellant storage facilities and satellite preparation building.