[time-nuts] How well does GPS work in the Arcitic?
jimlux at earthlink.net
Mon Aug 14 21:23:44 EDT 2017
On 8/14/17 6:15 PM, Bob kb8tq wrote:
> If you are at ICBM mid course altitudes, there are a *lot* of sat’s visible ….
> (at least compared to being on the ground).
But do you get good VDOP?
I don't know how high the typical ICBM trajectory goes, I assumed it's
fairly low (why burn to get higher and take longer), say, 1000 km. So
in polar regions, there's still nothing above you if you're at 80
degrees latitude. The highest latitude the satellite gets is 55 degrees.
Maybe you can pick up VDOP from satellites that are "below" you (grazing
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