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This paper presents a systematic discussion on GPS C/A code cross correlation and its impact on signal acquisition, tracking and Ground-Based Augmentation System (GBAS) performance. Three types of cross correlation effects are investigated: 1) between two satellites that have approximately the same Doppler frequency; 2) between two satellites that have an offset at an integer number of kHz in Doppler...
This paper describes GPS carrier phase (CP) multipath characterization and error reduction techniques and their application in single aircraft relative positioning. In particular, the single aircraft relative positioning scenario has applications for high-accuracy multi-sensor stabilization where CP multipath is a major error source that limits system performance. We will briefly review the requisite...
This paper evaluates the performance of the tight integration of GPS and optical sensors such as digital vision cameras. The paper furthermore addresses certain integrity aspects of the proposed Tight Optical Integration (TOI) method. Target applications for the proposed system include the operation of UAVs in an urban environment for both civil and military applications. A regular unaided GPS position...
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