Am Montag, 18. August 2003 20:01 schrieben Sie:
> ----- Original Message -----
> From: "Greg Deputy" <greg@BLASTZONE.COM>
>
> > Nah, there are units available in the hundred hertz range, but pricey=
=2E
>
> Yeah, I've seen 'em... >$5000!! BTW, I don't need 100's of Hz; I was
> thinking more 2-5Hz. Just enough to get rid of navigation lag.
>
> > I'm working with a guy who is building GPS telemetry units for use in
> > model rockets, r/c planes, and other applications (www.gpsflight.com)=
=2E
> > He has several units he uses, and told me about some of the other
> > suppliers he spoke to.  I guess 1hz is pretty much the standard unles=
s
> > your app is military.  One contact he had was with the people who mak=
e
> > units used in GPS guided Mortar rounds.  Very tough gps units with hi=
gh
> > update rate and must survive high accelerations.  Anyways, they're ou=
t
> > there, but they're expensive and you have to jump through hoops to ge=
t
> > them.
>
> Yeah, Trimble has a bunch of Mil Spec OEM GPS units on their site. Only
> available to the U.S. military, and very likely comparable to the infam=
ous
> $1000 hammer in price.
>
> - Robert


You don't really need a fast updating GPS receiver... You could use a=20
combination of slow GPS receiver, magnetic Field sensor (electronic compa=
ss)=20
and an acceleration logging sytem to keep track of your position at any t=
ime!=20
You could connect these different sensor types with a PIC ;-) and let it=20
stuff out all the positioning data at a rate adequate for your needs!

MfG,
Do.Pe.

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