Introduction - If you have any usage issues, please Google them yourself
Weak signal tracking for the Global Positioning System (GPS), easy to loss of lock problem, propose a new tracking method using the square root of the Kalman filter algorithm, iterating use during operations in the form of the square root of the error covariance matrix, effectively reduced impact of rounding error. proposed a new GPS signal tracking measurement model based on continuous integral non-continuous integration process, through effective treatment and avoid navigation information bit flip signal operator affect