elevation angle for prime focus,offset normal and offset inverted
- Thread starter wium
- Start date
Lazarus
Retired Moderator
- My Satellite Setup
- 80cm Motorised.
Several small Dishes.
Much else.
- My Location
- North York Moors
Theses are two sites I use:
_http://www.satlex.de/en/azel_calc-params.html?satlo=28.5&user_satlo=&user_satlo_dir=E&location=53.75%2C-0.33&la=53.5&lo=-0.5&country_code=uk&diam_w=60&diam_h=70
_http://www.satsig.net/ssazelm.htm
But you may have to adjust results to take into account exactly what the offset angle is for any dishes you wish to use - they are not all the same!
Shouldn't be an issue for an offset dish mounted normally as the dish bracket should be graduated to take it into account.
For prime focus, the elevation of the dish face clearly corresponds directly to the required look angle.
Can't help you with the inverted offset as, again, the designed offset angle is one variable (depending upon design of the dish) and the novel installation method is another.
You will have to use the calculator as a tool to be used judiciously along with some common sense adjustments on the back of a fag packet!
Anyway, as you know, these are only starting points for final alignment as the mechanical assembly of everything from pole, bracketry, motor/actuator devices etc. means you are unlikely to be have a deadly accurate starting point!
_http://www.satlex.de/en/azel_calc-params.html?satlo=28.5&user_satlo=&user_satlo_dir=E&location=53.75%2C-0.33&la=53.5&lo=-0.5&country_code=uk&diam_w=60&diam_h=70
_http://www.satsig.net/ssazelm.htm
But you may have to adjust results to take into account exactly what the offset angle is for any dishes you wish to use - they are not all the same!
Shouldn't be an issue for an offset dish mounted normally as the dish bracket should be graduated to take it into account.
For prime focus, the elevation of the dish face clearly corresponds directly to the required look angle.
Can't help you with the inverted offset as, again, the designed offset angle is one variable (depending upon design of the dish) and the novel installation method is another.
You will have to use the calculator as a tool to be used judiciously along with some common sense adjustments on the back of a fag packet!
Anyway, as you know, these are only starting points for final alignment as the mechanical assembly of everything from pole, bracketry, motor/actuator devices etc. means you are unlikely to be have a deadly accurate starting point!