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Differential GPS over IP communication device

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marc 1999-09-03 00:11:28 +00:00
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commit b54b8933eb
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astro/dgpsip/Makefile Normal file
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# $OpenBSD: Makefile,v 1.1.1.1 1999/09/03 00:11:28 marc Exp $
DISTNAME= dgpsip-1.28
CATEGORIES= astro
MAINTAINER= wsr+dgpsip@wsrcc.com
HOMEPAGE= http://www.wsrcc.com/wolfgang/gps/dgps-ip.html
MASTER_SITES= http://www.wsrcc.com/wolfgang/ftp/
GNU_CONFIGURE= YES
.include <bsd.port.mk>

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MD5 (dgpsip-1.28.tar.gz) = 006f0792198e056598315b01aacb050d
RMD160 (dgpsip-1.28.tar.gz) = e1666c4cb566458f16353c44930c3d7a5f5ade9f
SHA1 (dgpsip-1.28.tar.gz) = e646fa8dfcb93a33cf374de00ba222c7499dde6a

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Differential GPS over IP communication device

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astro/dgpsip/pkg/DESCR Normal file
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On a stationary GPS without a differential correction signal, you
should see a 20m average radius "drunken walk" pattern. On the same
receiver with DGPS corrections and a good view of the sky, the
error the same receiver with DGPS corrections and a good view of
the sky, the error should be reduced to approximately 2m average
radius. If you've always wanted to know exactly where your house
is located without that annoying GPS "wander," but didn't want to
spend the money for a DGPS radio, here is your big chance!
I'd like to announce a fun DGPS hack. I've written a small Un*x
server and client for redistributing DGPS correction signals over
the Net. Basically the server grabs the serial byte stream from my
DGPS radio and sends it off over a TCP connection. The client does
the same thing but in reverse. The result is that you can receive
the local DGPS corrections from absolutely anywhere by using the
Internet as the world's largest extension cord. You'll still need
to be within 1000 miles or so of San Francisco, California, USA
for best results. However chances are better than not that the GPS
error will stillb e reduced if you are 2000 to 3000 miles away.
Several respondents from 2000 miles away have noted that the remote
differenential signals have diminished the SA induced position and
velocity errors by approximately 3x.

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bin/dgpsip
man/man1/dgpsip.1