发明名称 Software GNSS receiver for high-altitude spacecraft applications
摘要 A system that provides GPS-based navigation/orbit determination capabilities for high-altitude spacecraft. The system uses an existing spacecraft processor and an easy-to-space-qualify minimum-hardware front end to minimize the need for new space-qualified hardware. The system also uses coherent integration to acquire and track the very weak GPS signals at high altitudes. The system also uses diurnal thermal modeling of a spacecraft clock and precision orbit propagation to enable longer coherent integration, a special Kalman filter to allow weak signal tracking by integrated operation of orbit determination and GPS signal tracking, and a segment-by-segment, post-processing, delayed-time approach to allow a low-speed spacecraft processor to provide the software GPS capability.
申请公布号 US8259012(B2) 申请公布日期 2012.09.04
申请号 US20100760294 申请日期 2010.04.14
申请人 LI RONGSHENG;GHASSEMI KAMRAN;KELLEY CLIFFORD W.;THE BOEING COMPANY 发明人 LI RONGSHENG;GHASSEMI KAMRAN;KELLEY CLIFFORD W.
分类号 G01S19/37 主分类号 G01S19/37
代理机构 代理人
主权项
地址