Portfile

# $Id: Portfile 20412 2006-11-03 02:14:55Z jberry@macports.org $

PortSystem 1.0
name dgpsip
version 1.32
categories comms
maintainers nomaintainer@macports.org
description Differential GPS over IP communication device
long_description On a stationary GPS without a differential correction \
signal, you should see a 20 m 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 2 m 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 error will still be reduced if you are 2000 to 3000 \
miles away. Several respondents from 2000 miles away have noted that the \
remote differential signals have diminished the SA-induced position and \
velocity errors by approximately 3 times.
homepage http://www.wsrcc.com/wolfgang/gps/dgps-ip.html
platforms darwin freebsd
master_sites http://www.wsrcc.com/wolfgang/ftp/
checksums md5 af948d8c485ac84a343c9210f2f05267