| 摘要 |
This publication discloses a method and apparatus for implementing a weather alarm in an outdoor computer ( 10 - 14 ). According to the method, atmospheric-pressure data ( 2 ) is defined repeatedly, altitude data ( 1 ) is defined repeatedly and essentially simultaneously with the atmospheric-pressure data ( 2 ), with the aid of a satellite positioning system, and both measured variables are converted into the same measurement unit, either pressure or altitude. According to the invention, the difference (Delta 1 ) between the converted variables ( 1 and 2 ) is determined and is stored as a reference value (Delta 1 ), the difference (Delta 2 -Delta 5 ) between the converted variables ( 1, 2 ) is repeatedly monitored, and when the difference (Delta 2 -Delta 5 ) changes by more than a preset limit-value relative to the reference value (Delta 1 ), a weather alarm is given.
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