53708

神经网络昆斯林的新闻组分类2006

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From: [e-mail] (Charles Thompson)
Subject: How does "Differential Mode" GPS work???
Message-ID: <[e-mail]>
Followup-To: poster
Organization: Capital Area Central Texas UNIX Society, Austin, Tx
Date: Mon, 19 Apr 1993 00:14:49 GMT
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I understand that the new GPS boxes now have an option
known as "differential ready".  Apparently land-based
beacons tranmit GPS correction information to your GPS 
receiver (with differential option installed).

How does this system work?  What frequency is used for
the land-based beacons?

Thanks in advance,

Charlie Thompson
.