[Space] APRS trackers

[Christie Dudley]

Another thing to worry about with an integrated GPS unit is if it'll read
above 40,000 ft. Most won't.

Christie
________
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On Mon, Jan 23, 2012 at 11:52 AM, tedward <arbzed at gmail.com> wrote:

> Don't forget the venerable OpenTracker+, which will interface with a GPS
> receiver of your choice:
>
> http://www.argentdata.com/products/otplus.html
>
>
> On Sun, Jan 22, 2012 at 4:29 PM, Adam Engelhart <adam at tellumo.net> wrote:
>
>> Ladies and gentlemen--
>>
>> Kindly find below my research on GPS/APRS trackers for Spacebridge.
>>
>> I'm afraid I don't have as much information on the parameters we
>> need--I know that at a minimum we should have it track above 60k feet.
>> (As I understand it, it is required that civilian GPS devices not
>> track when traveling over BOTH 999 miles/hour AND 60,000 feet AMSL,
>> but that a distressingly large proportion replace that AND with an OR,
>> which is yet another part of what makes high-altitude balloonery so
>> interesting. *This is not legal advice*, and *I am not your,
>> Noisebridge's, or Spacebridge's lawyer*: http://ianyl.net/TINLA.html ;
>> http://ianyl.net/ .)
>>
>> Regardless, I wasn't too sure about the weight or power budgets or of
>> what hardware we had on board or available, so I just looked up
>> whatever seemed decent. Results follow:
>>
>> BigRedBee (http://www.bigredbee.com/blgps_2mhp.htm):
>>
>>                * Proven altitude records:
>> http://www.bigredbee.com/kml_gallery.htm
>> ; some astonishing stuff at http://californianearspaceproject.com/ as
>> well
>>                * Includes GPS
>>                * Can use entire 2M band, as well as 70 cm band (but
>> latter is
>> limited to 16 mW, as opposed to 5 W--need some kind of radio guru to
>> look at this)
>>                * Supports various voltages
>>                * $275! But includes radio.
>>
>> Byonics TinyTrak3 (http://www.byonics.com/tinytrak/)
>>
>>                * Only $98 including GPS
>>                * Former successful use:
>> http://www.eoss.org/hardware/k0yuk_aprs.htm .
>>                * Needs external radio
>>                * Can power GPS (5V)
>>
>> These two seem to pretty much run the market, although there may be
>> something buried out there that I haven't been able to uncover. Once
>> again, IANYL/TINLA.
>>
>> --Adam Engelhart
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>
>
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