Boris Pervan

Relative RAIM and absolute RAIM both enable an aircraft to raise a flag within seconds of receiving faulty data. This article evaluates the protection-level equations for both methods, and examines them in the light of GNSS constellations optimized for 24, 27, and 30 satellites.

You might not know it from your own backyard performance, but mowing a lawn accurately and precisely constitutes a difficult systems problem, requiring centimeter-level accuracy and precision control for straight lines and smooth turns.