[TriLUG] rfp for lamp based db for gps

[Joseph Mack NA3T]

On Fri, 4 Nov 2005, Jim Ray wrote:

> i've got a potential project for a trucking company in new orleans that needs 
> to use gps to locate trucks and post data to a central web site.  most of the 
> gps devices cater to folks that want to know where to go.

this is a recent development. The original gps's had an 
interface (then serial) which talked the NEMA protocol (data 
is in ASCII) giving lat/lon and anything else the GPS device 
knew about. This was before LCD readouts etc. They also gave 
time markers at 1 pps of comparable accuracy to the 
satellites, enabling people at home to have near cesium 
grade clocks (see the TAC - totally accurate clock - try 
google). You had to select the gps - some added jitter to 
the pulses because of bad design.

I would expect the default on a GPS is for it to be able to 
cough up lat/lon on demand through an external link.

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml 
Homepage http://www.austintek.com/ It's GNU/Linux!