[time-nuts] Number of GPS sats in the sky?
Bob Camp
kb8tq at n1k.org
Fri Jul 10 01:36:21 UTC 2015
HI
http://www.gps.gov/systems/gps/space/
27 Sats in the sky.
Since their altitude is about 2 earth radii, they aren’t height enough to cover a full “half earth” at one time.
Bob
> On Jul 9, 2015, at 7:06 PM, Bob Stewart <bob at evoria.net> wrote:
>
> Thanks Chris and everyone else who responded. I just didn't know what to look for. The full 36 shouldn't take up all that much memory.
> Bob
> From: Chris Hoffman <cq.kg6o at gmail.com>
> To: Bob Stewart <bob at evoria.net>; Discussion of precise time and frequency measurement <time-nuts at febo.com>
> Sent: Thursday, July 9, 2015 5:48 PM
> Subject: Re: [time-nuts] Number of GPS sats in the sky?
>
> http://www.navcen.uscg.gov/?Do=constellationStatushttp://www.gps.gov/systems/gps/space/
>
> IIRC: 6 planes, 6 slots each, so 36 to cover the sphere, and the GPS aperture is big (high orbits) so guess up to 1/2 of the constellation could ever be in view (... yeah, right): 18?
>
>
> On Thu, Jul 9, 2015 at 10:54 AM, Bob Stewart <bob at evoria.net> wrote:
>
> Is there a practical limit to the number of GPS sats overhead at any one time? I ask this because I'd like to start parsing this info from my ublox receiver and need to setup an array for the values. Memory is not unlimited on my PIC.
>
> Bob - AE6RV
>
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