基于北斗卫星导航的搜救系统原理与构型

为使基于北斗卫星的导航搜救系统比现有全球卫星搜救系统（COSPAS-SARSAT）更具先进性、优越性、更适应我国国情，在全球卫星搜救系统基础上构建基于北斗卫星搜救系统的原理和构型，使其具备提供全天候、全天时、高精度、高可靠的定位、导航和授时服务，并充分利用短消息服务有效缩短救生搜索和定位时间，提高了搜救效率，同时加强卫星定位保密程度，为未来军事用途打下基础。

Principle and Structure of SAR System Based on BDS

In order to create a more advanced SAR system compared with COSPAS-SARSAT, we proposes the principle and structure of SAR system based on BDS （BeiDou Navigation Satellite System）. This SAR System not only provides highly accurate locations and time information in all weather conditions and at any time, it also offers short message system which can cut the time for SAR and high security which is critical for military tasks.