Based on the general requirements of GPS Receiver performance evaluation and the character of the vehicle navigation GPS receiver,this paper puts forward an integrated performance evaluation method which includes the general inspection for receiver,the evaluation of the positioning accuracy,the evaluation of the effect of the environment.

Due to the development of GPS navigation technology and the trend of micromation in spacecraft designing, the spaceborne GPS receiver has become one of the indispensable payloads in small space vehicles in recent years.

This paper has systematically discussed an easy way to determine observation parameters of navigation-based GPS and,through test and research on absolute position precision and relative position precision,discovered the fact that the observation parameter determination plays a leading role in navigation-based GPS positioning.

The navigation-based GPS is an effective tool of navigation and location in the route reconnaissance and design of pipeline.

Approach to improve navigation GPS position accuracy;

Through comparison and experimental analysis a new method using the known point to calculate the coordinate transformation parameters of navigation GPS is proposed,it not only eliminates the difference between the two coordinate systems,but also reduces some systematic errors from the navigation GPS.

Based on the principle of the M12-GPS receiver,a code format converter from B-code to M12 is designed with MSP430 microcontroller and the hardware and software of the code format converter are introduced.