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Dish Offset Angle

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Polly
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Dec 10th, 2016 at 1:48am  
Would some kind person be able to tell me the offset angle of an Ipstar antenna. The horizontal diameter of the dish is about 1.2 m and my rough attempts so far suggest that the angle is more than 20.

Thanks.
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« Last Edit: Dec 12th, 2016 at 2:16am by N/A »  
 
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Reply #1 - Dec 10th, 2016 at 11:53am  
You could try

http://www.satsig.net/pointing/finding-dish-offset-angle.htm

I am not sure it gives correct or accurate results but you could give it a try. It assumes the rim of the dish is truly flat.

Best regards, Eric.
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Polly
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Reply #2 - Dec 12th, 2016 at 2:20am  
Thanks Eric.  I was hoping that someone would know the design angle but I will get around to measuring - not so good on a ladder any more.
Best regards,
John
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Reply #3 - Dec 12th, 2016 at 2:30pm  
If your antenna is anything like this:
http://www.ipstar.com/pdf/products/IPatenna.pdf

Note that the rim does not appear flat. Therefore the calculation won't work.

If you are pointed at a known satellite find out the calculated elevation angle for your location using
http://www.satsig.net/maps/satellite-tv-dish-pointing-south-east-asia.htm

Then note or mark the elevation angle on the scale. At least that marked point of the scale will then have an exact meaning for you. Set other elevations angles relative to that mark.
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