AG-Dream: an innovative series of GNSS receivers for use in agriculture. The AG-Dream has a built-in high-precision OEM satellite receiver and antenna device in one rugged housing for practical use in harsh environmental conditions. The extraordinary efficiency of reception and processing of code and phase signals of L1 GPS, G1 GLONASS, B1 Beidou and E1 Galileo together with a special Pass-To-Pass (from the English - "track to track") filter provide high-precision relative determination of coordinates from epoch to epoch on subcentimeter level. This guarantees an error of less than 10 cm in the overlap of agricultural machinery at an interval of up to 15 minutes (ie: the deviation from the given course during 15 minutes will be less than 10 cm).