Device and method for calibrating and improving the accuracy...

Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring

Reexamination Certificate

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C342S118000, C342S120000, C342S165000, C342S173000, C342S175000, C342S195000, C342S357490, C342S357490, C702S085000, C702S098000, C702S127000, C702S138000, C073S384000, C073S865200, C701S001000, C701S003000, C701S004000, C701S010000

Reexamination Certificate

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11551180

ABSTRACT:
In a combined GPS/altimeter device, the calibration and hence the accuracy of barometric altimeter measurements are enhanced with the aid of derived altitudes from a GPS. The device determines the need for calibration and perform the subsequent computations necessary to facilitate the calibration. Furthermore, the device determines a correction quantity that should be applied to barometric altitude readings, thereby allowing the device to be calibrated while in motion. Both of these features ultimately result in a more accurate determination of altitude.

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“Measuring RMS Values of Voltage and Current”; no author listed; no date given; Dataforth Corp.; Tucson, Arizona, USA; on the Internet at dataforth.com.

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