as far as I know

来源: 用户名被占用了 于 2011-02-23 13:45:39 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (256 bytes)
回答: thanks. GPS 能不能算出高度？ 由 433832795028 于 2011-02-23 13:39:41

They all use air pressure to measure the altitude. It means they all use barometer. It takes a reference point at ground level, then measure the difference.

Aircraft altimeter converts the air pressure to altitude. Capable GPS does the same.

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• 哦 -433832795028- ♂ 给 433832795028 发送悄悄话 (0 bytes) () 02/23/2011 postreply 13:48:42

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• 测高度温度有的手表都带 -歌唱家- ♂ 给 歌唱家 发送悄悄话 (69 bytes) () 02/23/2011 postreply 14:01:45

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