GLONASSARY

PPM (Parts Per Million) – In positioning terms, ppm is a representation of position error as a function of distance between two communicating devices. For instance, if a user was operating a guidance system that depended on a single base station, a one-inch ppm error would occur if the user was 15.78 miles (one million inches) away from the base station, in addition to random error and other systematic error sources.

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GLONASS ARTICLES

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