China news agency, Beijing, June 24 (Reporters Ou Yang and

China news agency, Beijing, June 24 (Reporters Ou Yang and Kai Yu) - Successful rendezvous and docking, telemetry between heaven and earth, high-precision orbit determination, you must know where the 'temple' on the 1st position in the mouth, 'Shenzhou' nine The number of positions in the mouth where the error is not more than 1 millimeters. "monitoring and control communication expert, Chen Jianmin says. On the 24th, the Shenzhou No. 9 and Temple, a short separation, and with the manual rendezvous and docking in "Temple". Senior engineer Chen Jianmin, China Electronics Technology Group Corporation, said in an interview with reporters, "Temple" in the space, the target vehicle and 9 "Shenzhou" spacecraft, 1 high-speed operation, speed of more than 28,000 km. In the docking process, a small error, it makes the spaceship thrown far away from the target aircraft. Spacecraft in the universe of high-speed flight, requiring high precision, ground stations need real-time spacecraft monitoring and control. Chen Jianmin, said ground stations will continue to launch Nipple Covers and receive radio waves, through the calculation of aircraft away from the Earth's distance and the radio transmission speed of the aircraft position measurement. "God seven successful launch of our ground station monitoring and control equipment were a major transformation equipment faster, higher measurement accuracy, and a computer can be completed before nine cabinet to complete the work. In order to adapt the space missions Temple One (), this particularity of the Shenzhou No. 9 two aircraft, the ground station and control system to achieve these two objectives to carry out the monitoring and control. "said Chen Jianmin. For time accuracy, Chen Jianmin said that the low speed of the universe is 7.8 kilometers per second, ie, 7.8 km / sec to leave the Earth. In this highly sustain its run at least 8 km / sec, the higher the orbit, its velocity is higher. The entire monitoring network, the whole time synchronized to a clock, which is equivalent to the daily table. Accuracy of the table, how high "10 of the 11 th power roughly equivalent to 3170 years, not Gown Long Dress one second difference." Said Chen Jianmin.