[time-nuts] GPS backup for the stationary time and frequencyuser

SAIDJACK at aol.com SAIDJACK at aol.com
Tue Oct 12 21:49:19 EDT 2010

Hi Jason,
yes, we use uBlox among others. We have a very high opinion of these in  
mobile applications.
We add dynamic GPS filter parameter configuration in our software, the  
units with default configuration are not really usable in mobile applications  
above walking speed. We did numerous actual flight tests as well as varied  
simulator testing to fine-tune and optimize our software for mobile  
I am not aware that there are other GPSDO's optimized for mobile  
application velocities ranging from walking to supersonic that  automatically 
configure the GPS filter parameters, but would like to know what  else is out there.
In a message dated 10/12/2010 10:06:08 Pacific Daylight Time,  
jason at extremeoverclocking.com writes:


Are those using the u-blox receivers? (I don't know of any  other company 
with a 50 channel receiver.) If so, what's your  overall
opinion of them?


> one more product line:  all of our Jackson Labs Technologies,  Inc. 
> FireFly-1A and  FireFly-IIA based GPSDO Timing products use WAAS by   
> Actually they use WAAS in the Americas, Egnos  in Europe and other SBAS  
> signals around the  world.
> We have shown significantly better than 1 meter  horizontal  accuracy 
> moving inside a Turbo-Prop aircraft  with this setup, and timing  is also 
> greatly improved by  WAAS.

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