Hi all!
Would 'opening angle' and 'aperture angle' mean about the same thing in English?
I would like to use these terms for the angle RimaNSS described above, but I found that at least in Dutch language, the term 'opening angle' (openingshoek) is also used for the width or narrowness of a beam towards the satellites; relevant for the degree of interference from neigbouring satellites.
Copy from wikipedia, lemma "omroepsatelliet", translated to English:
When a satellite dish has the strongest signal, the optical axis of the paraboloid points precisely to the satellite. If the dish does not exactly point to the satellite, the field strength decreases. The total angle of rotation at which the field strength differs by about 3B is called the opening angle. This angle becomes smaller when the dish becomes larger.
So if the term is used for two different things (dish to LNB angle, and dish to satellites angle), that would be confusing.
Or is there also a direct link (1 to 1 relation) with this opening angle towards the satellite, and the dish-LNB illumination angle?
I hope you can shine some light on this.
Greetz,
A33