Abstract: Combining the technology advantages of GPS with the development requirements of near-space, this paper analyzed the application proprieties of near-space platform and proposed the augmentation system in near-space and analyzed the constrain problems and their solutions based on system fusion and augmentation positioning, and then discussed in detail the system integrity. Through the analysis of the system design and the algorithm process, the paper indicated that the development of the near-space positioning platform is the important technical support to the integration system of space and air and earth.

Key words: Near-space, GPS, Integrity