Used in combination with GPS, an accelerometer, a compass and the gyroscope can be used for in indoor navigation with floor accuracy.

与全球定位系统、加速度计、陀螺仪和指南针结合使用，可用于具有地面精度的室内导航。

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GPS III will improve position, navigation and timing services and provide advanced anti-jam capabilities yielding superior system security, accuracy and reliability.

GPS III将改善定位、导航和定时服务，并提供先进的抗干扰能力，提供优秀的系统安全、精度和可靠性。

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GPS III will improve position, timing services, navigation and provide advanced anti-jam capabilities yielding superior system security, reliability and accuracy.

GPS III将增强定位、授时服务和导航能力，具有先进的抗干扰性能，为全球用户提供安全、可靠和准确的服务。

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The Pioneer SmartCradle for iPhones is compatible with all GPS enabled apps, including MotionX-GPS Drive and is the first of its kind to incorporate a built-in gyro sensor and accelerometer combined with an external antenna for improved GPS reception and location accuracy, even if GPS signals are limited by high rise buildings and tunnels.

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America is planning to improve its satellite-navigation system further: next year, it will start launching a second generation of GPS satellites, which will offer greater accuracy for civilian users and, for military purposes, greater protection against the signal being jammed by an enemy.

ECONOMIST: Space race | The

For example, researchers in Arizona are using real-time kinematic global positioning systems, an ultra-precise version of GPS that can measure positions with sub-inch accuracy levels, to control weeds in cotton fields with steel cultivators.

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