Re: FW: doh! -Reply

[Bryan Billings <vwxcross@worldnet.att.net>]

Actually 24 is not right we have several backup sat's in orbit.  I can't
tell you the exact number but it is many more!

Bryan

Tom and Teecy Matthews wrote:
> 
> Subject: Re: [gti-vr6] OBDIII
> Date: Sat, 08 Aug 1998 12:58:36 -0400
> From: Tom and Teecy Matthews <tmmatthews@worldnet.att.net>
> To: gti-vr6@dev.tivoli.com
> 
> GPS uses 24 satellites, and yes it *is* one way. However, there is
> nothing to keep them from transmitting all this data to another
> satellite for data collection.
> 
> The hardware required for sufficient instantaneous fixes and accuracy
> would certainly be cost-prohibitive at this time. The GPS I use at work
> has submeter accuracy on an instantaneous fix and costs more than $10k!
> Weather/cloud cover also wreaks havoc with even the expensive units.
> Also, there is no way to get an accurate altitude reading on an
> instantaneous fix. Surveyors use carrier-phase hardware which requires a
> several-minute residence time to get an accurate altitude.
> 
> Intro to GPS is now over. If anyone has any questions, email me
> privately :)
> 
> My question is, *who* is going to be monitoring the thousands/millions
> of cars with this crap onboard?  Most of this sounds like utter garbage.
> If it *does* happen, I'll just have to keep driving my "antiquated"
> --->GTI VR6<---
> 
> Tom M. Matthews
> tmmatthews@worldnet.att.net
> '95 GTI VR6
> 
> >If any of you knows *anything* about GPS, it is a system for determining
> >position relative to several (17?) satellites around the globe.  It is a
> >one-way system, i.e. the satellites transmit their info to the receivers
> >(GPS units, etc), not the other way around.  The part in this message about
> >the car talking back to *anything* is complete BS and speculation.  I have
> >heard before that there would be some GPS integration into the next-gen
> OBD,
> >but nothing as ridiculous as this.  I *think* GPS can also determine
> >altitude as well, so possibly the ECU could benefit from some knowledge of
> >the car's altitude.  The other thing I heard (more speculation) was that
> the
> >GPS functionality could be used to verify that emissions related work was
> >being performed at an *authorized* service location, determined by
> Lat/Long.
> >> Also, the new OBD-III will be hooked into GPS.  It records top speed
> >> information, location on whereabouts, and also be hooked into the OBD-III
> >> chip.