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What’s the difference? What to choose. By Jordan Lyford Group: Ground Station.

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Presentation on theme: "What’s the difference? What to choose. By Jordan Lyford Group: Ground Station."— Presentation transcript:

1 What’s the difference? What to choose. By Jordan Lyford Group: Ground Station

2  Azimuth A compass bearing True North is Zero Spins around the vertical axis  Elevation (Altitude) Angle between the flat plane and the object in the sky (satellite).

3  Satellites sometimes have unusual orbit characteristics. Some orbit the earth around the equator Some orbit around the earth’s poles Some just hang out  They can drift from the original orbit path around the earth.

4  Single Axis Needs only an Azimuth motion (elevation never changes) Also called a Polar orbit  Dual Axis** Both Elevation and Azimuth need motion to track the satellite Needed when Satellite has an unusual orbit  Stationary Dish Tracking a satellite that is stationary (Direct TV or Hughes Net) The Satellite is Geostationary

5  Altitude-Azimuth Mount Very basic and simple to build Is the cheapest setup -- However takes a much more sophisticated motorized control system. -- When the elevation hits 90 degrees, the motors go ??????

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7  A Fork Mount: Same simple left-right/ up/down characteristics Allows the dish to go over backwards if it needs to.

8  Equatorial Mount The movement of the Azimuth (here the Declination Axis) makes an arc in the sky. The Elevation (a) is set parallel to the earths axis of rotation. This system is much more accurate than the Fork and needs a much less complicated control system.

9  Knowing the Satellite path ultimately determines what setup is best. If the Satellite orbit is not a polar orbit, then the Equatorial Mount might be the best choice.

10  If there is a polar orbit, or strange orbit all together:  The Dish with the Fork configuration may be the best choice.

11 Fork MountEquatorial/Fork Mount

12  Deep Space Tracking Lab Dishes (Australia, Brazil)

13  It depends on the Satellite Path The Fork mount configuration if we want versatillity The Equatorial configuration if the satellite path is normal to the earths rotation and surface.

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