Real-Time Kinematik (RTK) systems use a local base station to determine the correction for each satellite by measuring the distance to each satellite and comparing that to the theoretical distance to the base station receiver. With an RTK system, this correction information is then sent via a wireless data link to a vehicle GPS system, most commonly radio modems were used for the data link. For the John Deere StarFire RTK system, the actual corrections are calculated at the base and sent via the data link, simplifying the amount for calaculation that the vehicle system must do in order to determine its position. One major limitation of any RTK system has been that the radio data link must be continous. John Deere developed a new, patent-pending feature, the RTK Extend. This feature allows a user to extend RTK level accuracies for up to 15 minutes if the RTK data link with the basis corrupted or lost. Critical to RTK Extends is the RTG (Real-Time Gypsy) signal option, the highest accuracy satellite-based correction signal available for the StarFire receiver. This RTG concept brings a new level of worldwide accuracy to wide-area differential GPS navigation. RTG exhibits very low drift rates once its filters become fully charged in the initial warm-up period. When the RTK data link is lost, the RTG position continues on smoothly with very low drift rates until the RTK data link is re-established. The StarFire RTK system consists of a base station with StarFire Receiver, RTK radio, stable mounting structure, 12 V power supply and a rover with StarFire receiver and RTK radio.
StarFire RTK. The next generation of real time kinematik positioning systems
2005
6 Seiten, 3 Bilder, 5 Quellen
Conference paper
English
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|