[time-nuts] New NTBW50AA

Bob Camp lists at rtty.us
Wed Sep 11 22:49:06 UTC 2013


Hi

Ideally you would like the position error to be under 10" for the device to work at it's best. That's probably going to equate to a couple of inches of error in X, Y, and Z.  Since GPS has cyclical errors, you need an average over a few days to get to that level. 

Bob

On Sep 11, 2013, at 1:49 PM, quartz55 <quartz55 at hughes.net> wrote:

> The lat lon did change when I did the survey.  On google, the lat lon is real close, a foot or so for the before position and after also.  It certainly doesn't march around the neighborhood looking, the last survey must have only taken a few minutes.  As far as antenna position, I guess maybe I can put it over on the hughes dish, but it's closer to the trees there.  How far away from those beams do I need to get, so they're not in the el mask?  Maybe I could put it on one of the roof vents but the coax will then drag across the shingles.  I'll have to think about this.  On the deck is good, but the wifey wouldn't go for that and it would be lots lower.  Maybe if I paint it flat black she won't see it.
> 
> You can see where google reports it here and the arrow is more where it is, so maybe it's 4-5' off.
> http://i251.photobucket.com/albums/gg287/DogTi/time/roof_zps5eccff6a.jpg
> 
> Dave
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