Navigational Aids• Know the theory and operation of modern air navigational aids

Navigational AidsDescribe the theory and use

of a Doppler SystemDescribe the theory and use

of a Navigational Radar System

Describe the theory and use of a Inertial Navigation System (INS)

Describe the theory and use of Global Positioning System (GPS)

Named after Christian Johan Doppler, a German mathematician who discovered the principle of Doppler effect.

Doppler effect can be observed by listening to a passing racecar.

The Doppler Effect

Radar The term radar stands for

Radio Detection and Ranging. Echo principle. The radar antenna relays the

signal to an onboard computer where it is displayed on a radarscope.

Radar UsesLand NavigationLanding AidDetection and SurveillanceImagery

Radar

Doppler

By using the principle of frequency shift and a computer, you can measure the movement of an aircraft over the ground.

The Doppler system constantly adjusts to changes in wind direction, aircraft altitude, engine power, and it gives instantaneous indications of each.

Doppler Radar

Doppler

If you can tell movement in the V1-V4 axis, when compared to aircraft True Heading and True Airspeed, go you not tell Track and Groundspeed?And therefore Wind Direction and Velocity?

The speed of modern aircraft requires more sophisticated navigational systems than those of the past.

To use the inertial navigation system, an accurate fix inserted as a starting point

Accelerometer senses change in direction or speed – based on these changes the INS calculates navigational information: course, speed, distance to go, etc.

Inertial Navigation System (INS)

The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense

GPS satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. GPS receivers take this information and use triangulation to calculate the user's exact location..

GPS

The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense

GPS satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. GPS receivers take this information and use triangulation to calculate the user's exact location..

GPS

Navigational Aids• Know the theory and operation of modern air navigational aids