source: trunk/dports/comms/dgpsip/Portfile @ 2122

Last change on this file since 2122 was 2122, checked in by mij, 18 years ago

Add CVS Id tags.

  • Property svn:eol-style set to native
File size: 1.8 KB
1# $Id: Portfile,v 1.15 2003/03/03 06:12:16 mij Exp $
3PortSystem 1.0
4name            dgpsip
5version         1.32
6categories      comms
8description     Differential GPS over IP communication device
9long_description        On a stationary GPS without a differential correction \
10                        signal, you should see a 20 m average radius "drunken walk" \
11                        pattern. On the same receiver with DGPS corrections and a \
12                        good view of the sky, the error the same receiver with DGPS \
13                        corrections and a good view of the sky, the error should be \
14                        reduced to approximately 2 m average radius. If you've always \
15                        wanted to know exactly where your house is located without that \
16                        annoying GPS "wander," but didn't want to spend the money for \
17                        a DGPS radio, here is your big chance! I'd like to announce a \
18                        fun DGPS hack. I've written a small Un*x server and client for \
19                        redistributing DGPS correction signals over the Net. Basically \
20                        the server grabs the serial byte stream from my DGPS radio and \
21                        sends it off over a TCP connection. The client does the same thing \
22                        but in reverse.  The result is that you can receive the local DGPS \
23                        corrections from absolutely anywhere by using the Internet as the \
24                        world's largest extension cord.  You'll still need to be within 1000 \
25                        miles or so of San Francisco, California, USA for best results. However \
26                        chances are better error will still be reduced if you are 2000 to 3000 \
27                        miles away. Several respondents from 2000 miles away have noted that the \
28                        remote differential signals have diminished the SA-induced position and \
29                        velocity errors by approximately 3 times.
31platforms       darwin freebsd
33checksums       md5 af948d8c485ac84a343c9210f2f05267
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