About Todd Walter

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Todd Walter is a senior research engineer in the Department of Aeronautics and Astronautics at Stanford University, where he received his Ph.D. in applied physics. His research focuses on implementing high-integrity air navigation systems.

Posts by Todd Walter

Innovation: Navigation from LEO Posted on 30 Jun 2017 in the Featured Stories & From the Magazine & GNSS & Innovation categories.

Current Capability and Future Promise
GPS signals are so weak, they cannot be used reliably where they are obstructed such as indoors or in concrete canyons. But if the satellites were much closer, their signals would be much stronger. The low Earth orbit Iridium constellation is already orbiting, and providing a PNT service. This month we learn about its current capability and future promise. Read more»