We have a SyncInjector mounted on the south side of a concrete building. The building is thick concrete ( > 12"),  and extends up above the location of the GPS antenna 30 or 40 feet. The building is also a shallow "V" shape with the GPS antenna at inside base of the V. So the GPS antenna gets about 170° view of the sky to the south.

It goes through a periodic cycle of visibility, but it's not the same time every night, or even every day.


On 4/6/2018 2:20 PM, Forrest Christian (List Account) wrote:
But the question is, why at the same time every day?   Especially since the gps satellites don't orbit on a 24 hour period...   that's what has me troubled with my customer.

On Fri, Apr 6, 2018, 2:11 PM Bill Prince <part15...@gmail.com <mailto:part15...@gmail.com>> wrote:

    Exposure to the north or south should not make a significant
    difference. GPS satellites, excepting the WAAS satellites, are not
    in geostationary orbits. They are (mostly?) in medium earth orbit
    of around 12,000 miles.

    I think it may be more of how much of the sky they can see.


    On 4/6/2018 1:45 PM, Dave wrote:
    how much exposure to the northern hemisphere does it have?
    If I remember those antennas are fairly small

    On 04/06/2018 10:15 AM, Josh Luthman wrote:
    I have an epmp that has GPS problems and goes into the hold
    timer for a few minutes every single night for the last many
    months (maybe even a year).

    Didn't think much of it until I noticed all of the times being
    right around midnight, give or take...

    WTF?  Any ideas what's causing it?

    Josh Luthman
    Office: 937-552-2340
    Direct: 937-552-2343
    1100 Wayne St
    Suite 1337
    Troy, OH 45373


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