GPS着陸システムにおける擬似衛星の配置に関する検討

概要

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For a precision approach and landing system of aircraft using GPS, it is nessessary to improve the system performance such as positioning accuracy, integrity, continuity and availability. A possible way for improving the performance may be to use pseudolites (pseudo-satellites) located on the ground near airport in addition to ordinally GPS satellites. In this paper, we investigated how the positioning accuracy can be improved through the DOP analysis. Since efficiency of pseudolites may depend on relative locations of themselves with regard to runway and aircraft, we computed DOP values expected at a paticular airport with pseudolites located various positions arround. Pseudolites moving on the grid centered at the runway threshold of the airport, corresponding DOP values are presented. The result shows that a pseudolite located near the runway threshold improves the accuracy considerably. In case of using two pseudolites, they should be located on both sides of the approach course. Consideration to the relations with line-of-sights from the threshold to GPS satellites is also contained.
社団法人日本航海学会の論文
1998-09-25