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Spacecraft flew hundreds of thousands to hundreds of millions of kilometers from the earth, injecting speed when the size and direction of a slight error, arrived at target planets will appear large deviation error, for example, when Mars probe injecting speed 1 m/s speed (about one over ten thousand), arrived at Mars, about 100000 km distance deviation. Therefore, precise control and navigation must be carried out during the long flight. Flying to the moon is usually controlled by the orbital control system of the ground and space probe (see orbit control). Interplanetary flight distances, radio signal transmission time is long, the real-time remote control, can't so planets and interplanetary spacecraft orbit control system shall have the ability of autonomous navigation (see interstellar travel navigation and control). The United States, for example, "pirates" spacecraft in space flight of more than eight hundred million km, for 11 months of 2000 times of autonomous orbit adjustment, the final surface to achieve a soft landing on Mars, placement accuracy up to 50 km. In addition, in order to ensure the accuracy of the orbit control engine, the communication antenna is always aimed at the earth, and other systems work normally, and the detector has the autonomous attitude control ability
Whenever your freezer prevents running, look at the condenser coils across the back-end of your carton. Ensure that the sector is numerous inches at night wall membrane. Not a thing really should be at the very top as well as the back end, which will steer clear of the temperature forthcoming away, from your coils.
The inspection personnel of all kinds shall not exceed the scope of inspection and shall not engage in illegal punishment. The subject should be respected by the inspectors. The competent departments of the provincial departments shall carry out effective supervision and management of the inspection personnel of the system and find that the problems must be dealt with in a timely manner.
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