FreeBSD astro  : dgpsip
Differential GPS over IP communication device
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 than not that the GPS
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.
http://www.wsrcc.com/wolfgang/gps/dgps-ip.html
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dgpsip history
v. 1.14
date: 2007/07/22 19:33:48; author: laszlof; state: Exp; lines: +1 -1
- Add ports to "geography" virtual category
Approved by: Pav (wearing portmgr hat)
v. 1.13
date: 2005/11/25 12:30:20; author: edwin; state: Exp; lines: +1 -1
Upgrade to 1.35.
See http://people.freebsd.org/~fenner/portsurvey/astro.html#dgpsip
v. 1.12
date: 2004/02/11 23:22:34; author: linimon; state: Exp; lines: +1 -1
Jason Harris has agreed to take over maintainence. Thanks, Jason.
v. 1.11
date: 2004/02/11 03:03:05; author: linimon; state: Exp; lines: +1 -1
dbaker@FreeBSD.org has been inactive in the ports community for over
a year now, so return his ports to the unmaintained pool in the hopes
that someone will adopt them and give them a good home.
While here, pacify portlint on all of them.
Discussed with: various members of portmgr@, at various times over
the last few months.
v. 1.10
date: 2004/02/06 13:10:43; author: trevor; state: Exp; lines: +1 -0
Use PLIST_FILES (bento-tested, marcus-reviewed).
v. 1.9
date: 2003/03/07 05:55:28; author: ade; state: Exp; lines: +2 -1
Clear moonlight beckons.
Requiem mors pacem pkg-comment,
And be calm ports tree.
E Nomini Patri, E Fili, E Spiritu Sancti.
v. 1.8
date: 2001/01/16 17:30:03; author: sobomax; state: Exp; lines: +3 -3
Massive style enforcement - use ^I instead of spaces for variables identation.
v. 1.7
date: 2000/04/08 22:01:39; author: mharo; state: Exp; lines: +3 -3
update with the new PORTNAME/PORTVERSION variables
v. 1.6
date: 2000/03/27 00:41:20; author: dbaker; state: Exp; lines: +2 -2
port update: dgpsip 1.29 -> 1.32
v. 1.5
date: 2000/02/05 02:52:28; author: mharo; state: Exp; lines: +3 -1
move manpage from PLIST to MAN1= in the Makefile
v. 1.4
date: 2000/02/02 21:55:59; author: mharo; state: Exp; lines: +1 -3
portlint
v. 1.3
date: 2000/01/09 04:43:52; author: dbaker; state: Exp; lines: +5 -5
Update from v1.25->v1.29
freebsd.org->FreeBSD.org
v. 1.2
date: 1999/08/25 04:22:40; author: obrien; state: Exp; lines: +1 -1
Id->FreeBSD rename try 2.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
v. 1.1
date: 1999/06/30 03:58:13; author: dbaker; state: Exp;
branches: 1.1.1;
Initial revision
v. 1.1.1.1
date: 1999/06/30 03:58:13; author: dbaker; state: Exp; lines: +0 -0
initial import of dgpsip port
this is my first freebsd ports commit, so please let me know if I
missed something! _]:8)
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