firing point

The displacement deviation of the firing point brings the change to both the position of the firing point and survey data of the TT&C station,thus begets the changing of the target position on the rocket.

发射原点的位移偏差不仅对发射点的位置带来变化,同时使得测站的测量数据发生改变,从而影响到箭体上测量点的位置变化。

This paper compares the performance of ADTB-T system and DVB-T system between the two transmission situations of single transmitter and single frequency network used in the digital terrestrial television transmission system in Shanghai area.

主要介绍了上海地区数字电视地面传输系统中使用单频组网和单点发射两种情况下ADTB-T系统以及DVB-T系统的性能比较。