High-Precision Altitude Measurement Technology Using GPS and a Barometer

Abstract

  We developed high precision altitude measurement technology for a watch. The technology uses barometer and GPS together in which barometer calibrated with GPS altitude. We optimized the intake part of the air to improve the accuracy of the barometer. Moreover, we developed an automatic correction method of barometer using the temperature formula based on the statistical data and the altitude data acquired by a GPS receiver. With combining these methods, we realized high precision altitude measurement on a watch.