Celestial Systems: compute position by measuring the elevation and azimuth of celestial bodies relative to the navigation coordinate frame at precisely known times.
![program #4159 of the earth sky radio series program #4159 of the earth sky radio series](https://1.bp.blogspot.com/-x4soZYCsRSY/YIWuLZtsUDI/AAAAAAAAqLw/oihfJtDgXDY_etK-fZQdmznEnr4cUV7YwCK4BGAYYCw/s1600/preview%2B-%2B2021-04-25T091244.257.jpg)
Radio Systems: consist of a network of transmitters(sometimes also receivers) on the ground, satellite or on other vehicle.
![program #4159 of the earth sky radio series program #4159 of the earth sky radio series](https://i0.wp.com/thefilmgordon.com/wp-content/uploads/2016/04/eye-in-the-sky-eits_00961_crop_rgb_wide-1dcc012e59a17ff5461e21c4720ed14ef4574700.jpg)
Two Meanings Steering toward a destination of known position from the aircraft’s present position Steering toward a destination without explicitly measuring the state vector (mostly military arcfts) The process of measuring and calculating state vector onboard Surveillance or Position Reporting: the process of measuring and calculating state vector out side the vehicle Navigation sensor: may be located in the vehicle, in another vehicle, on the ground, or in space Vx Vy Vz Z Y X Six- component state vectorĥ Definitions Automatic Dependent Surveillance(ADS): reporting of position, measured by sensors in an aircraft, to a traffic control center. Donohue Prepared by: Arash Yousefi Spring 2002Ģ Summary Chapter 7: Attitude and Heading ReferencesĬhapter 1: Introduction to CNS Chapter 2: The Navigation Equations Chapter 3: Terrestrial Radio-Navigation Systems Chapter 4: Satellite Radio Navigation Chapter 5: Terrestrial Integrated Radio Communication-Navigation Systems Chapter 6: Air-Data Systems Chapter 7: Attitude and Heading References Chapter 8: Doppler and Altimeter Radars Chapter 9: Mapping & Multimode Radars Chapter 10: Landing Systems Chapter 11: Data Links and digital communicationĤ Definitions Navigation: the determination of the position and velocity of a moving vehicle. 1 Aviation Communication, Navigation, and Surveillance (CNS)