[roc-chat] Re: GPS unit speed and altitude limitations
- From: "Tom Miller" <Tom@xxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: <roc-chat@xxxxxxxxxxxxx>
- Date: Tue, 27 Dec 2011 09:35:42 -0800
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
<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-the
y-go-faster-than-1200-mph.html
Chris Spurgeon
chris@xxxxxxxxxxxxxxxxx
twitter.com/chrisspurgeon
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