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As was the case in the US during World War II, civilian volunteers are making important contributions to the Ukrainian war effort. On February 8, 2022, the first truckload of Starlink terminals arrived in Kyiv. A week later they were being used. By April 2022, there were 5,000 terminals in Ukraine, and 42,000 as of April 2023. (At this point, SpaceX and Ukraine have gone silent. Neither ChatGPT4, Gemini, Copilot, Perplexity, nor I could not find a current terminal count).

A: The “GNSS Solutions” column in the May/June issue of Inside GNSS [1] described the commitments that have been made by GNSS service providers in terms o

A: GNSS users who must verify the integrity of their navigation solutions to meet safety requirements need at least some knowledge of the degree to which they c

The value of the GPS SPS PS goes far beyond the specific parameters that it contains. It has a great deal of information regarding how GPS operates and ideally should be read in full (including the appendices) by everyone who works with GPS at the measurement level. This column reviews the information in the latest SPS PS and shows how it improves the performance of GPS applications. Since this information is used in real time to generate error bounds at high probabilities (“protection levels”) for applications with demanding integrity and continuity requirements, it also discusses the or...