GPS 星历的二进制格式详细说明，在解析GPS二进制数据时会用的到-GPS ephemeris detailed descr iption of the binary format, binary data in the resolution GPS to use when

计算这一历元接收到的星历数据，所有历元积累的卫星位置PRN_xyz,当前GPS时间T-Calculate the epoch receives ephemeris data, satellite location PRN_xyz epoch accumulated current GPS time T