Basic Concepts
GNSS is a global navigation satellite system. GNSS was created to determine the spatial coordinates of objects, as well as their speed and direction of motion. There are now 6 GNUs in the world: GPS (US), GLONASS (RF), Galileo (EU), Beidou (PRC), IRNSS (India), QZSS (Japan).
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GNSS-Calendar
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Geodetic calculator
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Upload Rinex Files
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Instructions
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