卫星双向法时间比对的归算

卫星双向法比对原理为两个台站同步发送和接收时间信号，可消除传递路径误差，因此比对精度高，它的缺点是效率低，占用大量卫星时间，也不适合于自动化操作，现正在研制的终端可多台站同时观测，克服了上述缺点，利用新的终端提出一种新的处理方法，研究表明多台站观测的同时性有更多的信息可提取，以提高比对精度。

Reduction for the Two-way Satellite Time and Frequency Transfer

TWSTFT is a method that the time signal for both of sites passes through the same way at the same times. It can reciprocate some errors . So, such kind of method, in the principle, can get very precise, results.It seems to contain disadvantages: low efficiency, spending longer satellite link time and difficulty for the automatic operation. A new modem with multi-user will be presented. It will overcome the above disadvantage 1]. It shows that there is more information which can be got it with common operation. So it is developing a new method ( the processing data with two stations still can be used) to process the data from new modem. In order to improve the accuracy with TWSTFT, a, new method for processing data is presented.