[roc-chat] Re: GPS unit speed and altitude limitations
- From: Greg Clark <bigredbee@xxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Tue, 27 Dec 2011 09:51:39 -0800
So how can one sell a GPS to the general public that removes the COCOM
limits? I thought you had to go thru an appeals process and be granted an
exception on a case by case basis....
-- Greg
On Tue, Dec 27, 2011 at 9:35 AM, Tom Miller
<Tom@xxxxxxxxxxxxxxxxxxxxxxxxxx>wrote:
> Garmin GPS that I supply with my UFC series flight computers interprets
> the rule to be altitude AND HORIZONTAL velocity. If you want to pay a lot
> more the NovAtel GPS I offer removes all restrictions with an application
> and additional fee.****
>
> ** **
>
> Tom Miller****
>
> Black Magic Missile Works****
>
> ** **
>
> *From:* roc-chat-bounce@xxxxxxxxxxxxx [mailto:
> roc-chat-bounce@xxxxxxxxxxxxx] *On Behalf Of *Greg Clark
> *Sent:* Tuesday, December 27, 2011 8:55 AM
> *To:* roc-chat@xxxxxxxxxxxxx
> *Subject:* [roc-chat] Re: GPS unit speed and altitude limitations****
>
> ** **
>
> Notice that they say high speed AND high altitude. Many manufacturers
> (including the SiRF III pictured) implement an OR function. I believe (but
> can not confirm) that the velocity component is 'speed over ground' so
> most rockets will never into this limit unless they're heading into orbit.
> ****
>
> ** **
>
> I have yet to see a data set from a rocket that exceeded both of these
> limits, so can't confirm what really happens.****
>
> ** **
>
> The balloon guys have compiled a pretty comprehensive list that show which
> work, and which do not above 60k. http://www.arhab.org****
>
> ** **
>
> -- Greg****
>
> On Tue, Dec 27, 2011 at 8:11 AM, Chris Spurgeon <chris@xxxxxxxxxxxxxxxxx>
> wrote:****
>
> The Make Magazine blog has a little discussion of the hows and whys that
> GPS units cut off at high speed and/or high velocity.
>
>
> http://blog.makezine.com/archive/2011/07/gps-units-disable-themselves-if-they-go-faster-than-1200-mph.html
>
>
> Chris Spurgeon
> chris@xxxxxxxxxxxxxxxxx
> twitter.com/chrisspurgeon
>
>
>
>
>
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