[time-nuts] FTS4060 C Field Time Constant

[Brian Kirby]

Its possible, its multipath.  Depending on your receiver, you can shut 
off reception from individual GPS PRNs.  Check to see which ones are in 
use at the time, and then turn one off.  12 Hours later, turn it back on 
and turn off another, etc.

Also, if you can turn off GPS PRNs, you can pick at time common with 
NIST and use the GPS archive at 
http://www.boulder.nist.gov/timefreq/service/gpstrace.htm to compare 
time (use view track to see one satellite by itself).


Poul-Henning Kamp wrote:

>In message <4223C82C.4030108 at pacific.net>, Brooke Clarke writes:
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>>Another clue that it's GPS based is to notice that the time of day
>>when the big changes occur are about the same.  The major lines are
>>each at midnight.  Maybe it's related to which GPS satellites are
>>being used?
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>Have you tried setting a mask-angle in your GPS ?
>
>Try 10 or 15 degree depending on how cluttered your horizon is.
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