1 / 22

Satellite Communications Lecture 3: Look Angle Determination in Geo Satellites

Learn how to calculate elevation and azimuth angles for GEO satellites, using distances and coordinates, with examples and formulas.

trimmer
Download Presentation

Satellite Communications Lecture 3: Look Angle Determination in Geo Satellites

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Satellite Communications Lecture 3 Look Angle

  2. Look Angle Determination

  3. Look Angle Definition

  4. Definitions (Contd.)

  5. Calculating Look Angle

  6. Coordinate System

  7. Coordinate System

  8. Satellite Coordinates

  9. Review of Geometry

  10. Geometry of Elevation Angle

  11. Central Angle

  12. Elevation Angle Calculation

  13. Example: Elevation Angle for GEO Satellite Using rs = 42,164 km and re = 6,378.14 km gives d = 42,164 [1.0228826 -0.3025396 cos(γ)]1/2 km Which finally gives the elevation angle

  14. Azimuth Angle Calculation • More complex approach for non-geo satellites. • Different formulas and corrections apply depending on the combination of positions of the earth station and subsatellite point with relation to each of the four quadrants (NW, NE, SW, SE). • Its calculation is simple for GEO satellites

  15. Azimuth Angle Calculation for GEO Satellites • SUB-SATELLITE POINT • Equatorial plane, Latitude Ls = 0o • Longitude ls • EARTH STATION LOCATION • Latitude Le • Longitude le

  16. Azimuth Angle for GEO sat.

  17. Azimuth Angle for GEO sat.

  18. Azimuth Angle for GEO sat.

  19. Example for Look Angle Calculation of a GEO satellite

  20. Example (Contd.) El=5.85o

  21. Example (Contd.)

  22. Example (Contd.)

More Related