In this paper,the method for estimating valid almanac for the GPS satellites is introduced,and for the r eceived GPS signals how the Doppler shift components impact the satellites signa ls acquisition time are analyzed.是什么意思_In this paper,the method for estimating valid almanac for the GPS satellites is introduced,and for the r eceived GPS signals how the Doppler shift components impact the satellites signa ls acquisition time are analyzed.在线翻译_英语_读音_用法_例句