Multi-constellation Satellite Integrated Navigation And Positioning Algorithm

The global satellite position system (such as GPS, GLONASS) has been extremely mature by the navigation technology, but sometimes satellite navigation is still getting a limit in some aspects and some special districts, so it could not get a good navigation accuracy.This paper mainly discussed algorithm and simulation of Multi-constellation navigation system, the key point of it is (1)bring in Pseudolite;(2) discourse upon the combination of Pseudolite based on BD constellation,GPS constellation and Pseudolite. First, the paper bring forth the algorithm of Multi-constellation, it was originated from GPS location method. Secondly,put forward the premise of how to accomplish Multi-constellation-space time unify. Then, the error analysis is given to analysis the Multi-constellation's performance,through this, we can find out that the GDOP has evidently advancement.thence,the deviation is analyzed in paper, and offer the amend algorithm. Last, simply discussed how to decrease bias reduction through differential technology, thus raise location accuracy.