GNACAD has an official YouTube channel with playlists like "GNACAD HVAC Basics" and "From CAD to CAM." You can:
Before a field campaign, you might compare your rover antenna (LEIAR25) against a reference (JAV_RINGANT). gnacad tutorial pdf
Command:
gnacad -antex igs20.atx -diff LEIAR25 JAV_RINGANT -elev 10 90 -azim 0 360
Interpretation: A mean difference >2mm means you cannot interchangeably use them without applying corrections. GNACAD has an official YouTube channel with playlists
The "Straight to the Point" Approach The strongest selling point of a Gnacad PDF is its density. The author(s) rarely waste time on fluff. Interpretation: A mean difference >2mm means you cannot
Formatting and Readability