[time-nuts] GPS at 60,000 feet

[SAIDJACK at aol.com]

How to check if a GPS works at 60,000 feet: send up a  balloon:
 
The good folks at Duke University sent a uBlox based  GPSTCXO up there, and 
it worked at max balloon altitude which was about 60,000  feet. The ambient 
temperature must have been around -50C up there, and maybe  down to -67C 
during the ascent, but probably higher inside the electronics box  due to 
insulation and self heating etc:
 
 
_http://lightningballoon.blogspot.com/_ 
(http://lightningballoon.blogspot.com/) 

 
Note that this is higher than the older GPS would support, due to the new  
Wassenaar speed/altitude limits.
 
bye,
Said