Can You Believe This Dish is Elevated at 5deg

[Babadem]

• The offset angle of that CM dish is 26°.
• When the reflector is inverted the dish will be aim 26° lower than the vertical plane of dish.
• If an inclinometer is placed on the vertical plane of the dish, the dish would need to be tilted back 26° to be aimed at 0° elevation.
• The OP wanted to receive a satellite at 5°, so add and additional 5°. You guys got the math right.

Why invert the dish?

• To overcome the physical limitations of the mount or the dish striking the mast.
• To minimize terrestrial ground noise, providing a better carrier to noise C/N ratio and improve the Signal Quality.

Inverted Elevation Angle = Dish offset Angle + Elevation in Degrees on a given Satellite

So, this formula takes the guess work out of mounting inverted dishes.

 

[PopcornNMore]

Questions:
1) Can an inverted dish be motorized and receive the entire arc accurately?

2) I read a post several years ago called "The Poor Man's Mount" where both the dish and mount are inverted. It allowed you to simply rotate the mount on the pole to receive the satellites without ever adjusting the elevation. Does anyone have the link to this old thread?

 

[Wescopc]

Maybe this link ...
http://www.satelliteguys.us/free-air-fta-discussion/76701-inverted-dish.html
Bob

 

[FaT Air]

1) I would think so 2) as long as the rotation axis is at an angle = to your latitude*, wha-la, polar mount. *using the modified declinations latitude angle would be a little more accurate (it's within 1° of your true latitude). google: poor mans htoh siteguys.us