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Southern Illinois | Up untill last year Deere used RTG calculations (Real Time Gypsy). They had to pay for these as it's jointly owned by NASA and the Jet Propulsion Lab at Cal Tech. Deere began transitioning receivers away from RTG with software updates. In 2015 they quit broadcasting the RTG and only send out their new corrections. This caused pre iTC receivers to have no SF1 or 2 anymore and now only have WAAS. So in their transition they may have not kept quite the correction quality they had from NASA. | |
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