[time-nuts] More from the obsolete gps file: oncore nmea

Ralph Smith ralph at ralphsmith.org
Sun May 30 22:59:01 UTC 2010


The Vienna (Virginia) Wireless Society has had several balloon launches. Our last, on May 1, 2010 reached 117,877 ft. We use a Garmin GPS-18, which works at these altitudes. Information on our flights can be found at <http://www.viennawireless.org/balloon/missions/>, and some pictures from the latest flight are at <http://www.wherry.com/photos/2010-05-01-balloon-vws8/>.

Ralph

On May 30, 2010, at 6:14 PM, <normn3ykf at stny.rr.com> wrote:

> Björn,
> There are some gps units that work above 60k ft. Some do not. It's a question of trial and error.
> http://showcase.netins.net/web/wallio/GPSrcvrsvs60kft.htm
> Do understand about and versus or, though.
> 
> Thanks,
> Norm 
> ---- bg at lysator.liu.se wrote: 
>> The export restricion is really speed & alt above limit. Low speed and
>> high altitude should be no problem. However many vendors have chosen OR
>> instead of AND.
>> 
>>   http://www.armscontrol.org/documents/mtcr  item 11
>> 
>> --
>> 
>>   Björn
>> 
>> 
>>> Mike,
>>> We're launching a weather balloon. Using APRS to track it. The balloon
>>> will easily reach altitudes in excess of 65535 ft. The tracker only
>>> accepts nmea input.
>>> 
>>> Most gps units won't work over that number, for obvious reasons. Why
>>> bother to code beyond that number as few people will need it as well as
>>> the export restriction on altitude and speed.
>>> 
>>> Sounds crazy, but then again, it's time nuts..
>>> 
>>> Norm McSweyn
>>> 
>>> ---- mike cook <mike.cook at orange.fr> wrote:
>>>> I see "high" is a relative term.
>>>> 
>>>> em-406a seems to be spec'd for 18000 meters. where are you going?
>>>> 
>>>> 
>>>> Le 30/05/2010 22:35, normn3ykf at stny.rr.com a écrit :
>>>>> Hi all!!
>>>>> Not all oncores are created the same. I THINK (based on inference)that
>>>> some of the GT+ receivers don't support nmea. Bad luck on my part to
>>>> get those. BTW: M12+t's don't support nmea, either.
>>>>> 
>>>>> I queried the gps id from the board, and noted when I tried to send
>>>> @@ci from tac32 that it said supported in ver2 and greater.. Mine is
>>>> ver1.
>>>>> 
>>>>> Just my luck.
>>>>> 
>>>>> Anyone got a nmea capable (proven) that they'd like to sell. Must be
>>>> capable of high altitude flight.
>>>>> 
>>>>> Thanks.
>>>>> Norm n3yfk
>>>>> 
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>>>>> 
>>>>> 
>>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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