Re: gpsd Satellite Elev & Azim

[Patrick Conroy]

if i convert meters to feet, you are seeing a 5 foot difference.  isn't that well below the inherent accuracy of these devices?

and I don't think i would expect two different devices from two different manufacturers to do their math(s) identically.  are these two both u-blox based?  identical firmware?

if they should be expected to produce identical results, I'd be surprised and would have learned something today.  :)

On Fri, Jun 7, 2024, 3:27 AM Nick Taylor <nicktaylor@dataskill.uk> wrote:

Hi all

Just a random question... I have 2 different GPS receivers and have
noticed that they report slightly differing Elevation and Azimuth
numbers for Satellites

I'm attaching screenshot, but I know that Gary prefers text so eg
numbers transcribed here:

Receiver on left is Ublox Neo M8N
GNSS     S PRN    Elev    Azim   SNR   Use
GP 7       7      14.0   326.0  25.0    Y
SB123     36      27.0   151.0   0.0    N

Receiver on right is MTK-3301 SIM68M
GNSS     S PRN    Elev    Azim   SNR   Use
GP 7       7      13.0   326.0  39.0    Y
SB123     36      26.0   150.0  28.0    N

Anyone seen similar - I'd have expected the numbers to exactly match??

I'm in UK BTW if that makes any difference (well I guess you know
*exactly* where I am - GPS is wonderful :D  )

TIA

Nick