[hpsdr] GPSDO change

[Mike Seguin]

Glen,

Looking good! Give it time. It needs to get an ephemeris.

The three strings we want to look at are GPGGA, GPRMC and GPGSA. The 
GPGGA string will start with a series of commas followed by the number 
0. If you have a valid lock, the number will be either 1 for a valid GPS 
fix or 2 if you’re using DGPS and have a solution. This only indicates 
that you have a fix. What we really want is a 3D fix. When you look at 
the GPRMC string, the V near the beginning of the string indicates an 
error. An A in this position would indicate a valid solution. The best 
string is GPGSA. The second field in the sentence is the one you want. 
If there is a 3 in this position, it would indicate a valid 3D GPS fix 
and good 10 kHz output.

Mike

On 3/3/2017 2:03 PM, K4KV wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> OK, something is happening now, after several minutes after restoring
> patch antenna power:
>
> N,11356.2280,W,0.000,0.0,030317,9.7
>
> that is NOT my lat and long, but it is not zero
>
> which frame has the '3'?
>
> I see $GPGSV,3,1,12,22,90,173,47,01,32,222,,23,,000,,29,,000,*7F
>
> 73
>
> Glen K4KV
>
>
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-- 

73,
Mike, N1JEZ
"A closed mouth gathers no feet"