Lesson 1: Basic Terminology
Part A: Radio Wave Propagation
Table 1. Frequency range and band designator.
Figure 1-3. Horizontal wave polarization.
Figure 1-4. Reflected radio waves.
Table 2. Characteristics of the atmosphere.
Figure 1-6. High frequency wave penetration.
Table 3. Characteristics of the ionosphere.
Figure 1-7. Direct and reflected routes for radio waves.
Figure 1-8. Ground waves and sky waves.
Figure 1-9. Skip zone and distance.
Figure 1-10. Multihop transmission.
Part B: Properties
Figure 1-12. Response pattern for a bar antenna.
Figure 1-15. Antenna baseline.
Figure 1-16. Angle of arrival.
Figure 1-17. Bidirectional ambiguity.
PART C: Elements
Figure 1-20. Cut of 2 DF stations.
Figure 1-22. Plotted probable location.
The Chiefs of Staff of the Army and Navy have implemented
Figure 1-23. Single station locator DF.
Lesson One Practice Exercise - IT03020026
Lesson One Practice Exercise - Continued - IT03020027
Lesson One Practice Exercise Answer Key Feedback - IT03020028
Lesson 2. Equipment Requirements
Figure 2-1. Airborne radio direction finding.
Figure 2-2. Basic components.
The Radio Receiver
Figure 2-3. Plane perpendicular to the wave front.
Figure 2-4. Deep nulls and broad nulls.
Part C: Requirements
Figure 2-6. Crossed loop antenna.
Figure 2-8. Crossed adcock antenna.
Figure 2-10. Variation of Loop Antennas.
Figure 2-11. Two null points.
Figure 2-12. Example of adcock antenna.
Figure 2-13. Interferometric system.
Direct coupling is the simplest form of coupling
Direct coupling is the simplest form of coupling - Continued
The use of a goniometer introduces an additional possibility
The use of a goniometer introduces an additional possibility - Continued
The type of bearing indicator
Visual indicators
Bearing seeking indicators
Lesson 2 Practice Exercise - IT03020051
Lesson 2 Practice Exercise - Continued - IT03020052
Lesson 2 Practice Exercise Answer Key Feedback - IT03020053
Introduction to Radio Direction Finding
Part A: Radio Wave Propagation
Table 1. Frequency range and band designator.
Figure 1-3. Horizontal wave polarization.
Figure 1-4. Reflected radio waves.
Table 2. Characteristics of the atmosphere.
Figure 1-6. High frequency wave penetration.
Table 3. Characteristics of the ionosphere.
Figure 1-7. Direct and reflected routes for radio waves.
Figure 1-8. Ground waves and sky waves.
Figure 1-9. Skip zone and distance.
Figure 1-10. Multihop transmission.
Part B: Properties
Figure 1-12. Response pattern for a bar antenna.
Figure 1-15. Antenna baseline.
Figure 1-16. Angle of arrival.
Figure 1-17. Bidirectional ambiguity.
PART C: Elements
Figure 1-20. Cut of 2 DF stations.
Figure 1-22. Plotted probable location.
The Chiefs of Staff of the Army and Navy have implemented
Figure 1-23. Single station locator DF.
Lesson One Practice Exercise - IT03020026
Lesson One Practice Exercise - Continued - IT03020027
Lesson One Practice Exercise Answer Key Feedback - IT03020028
Lesson 2. Equipment Requirements
Figure 2-1. Airborne radio direction finding.
Figure 2-2. Basic components.
The Radio Receiver
Figure 2-3. Plane perpendicular to the wave front.
Figure 2-4. Deep nulls and broad nulls.
Part C: Requirements
Figure 2-6. Crossed loop antenna.
Figure 2-8. Crossed adcock antenna.
Figure 2-10. Variation of Loop Antennas.
Figure 2-11. Two null points.
Figure 2-12. Example of adcock antenna.
Figure 2-13. Interferometric system.
Direct coupling is the simplest form of coupling
Direct coupling is the simplest form of coupling - Continued
The use of a goniometer introduces an additional possibility
The use of a goniometer introduces an additional possibility - Continued
The type of bearing indicator
Visual indicators
Bearing seeking indicators
Lesson 2 Practice Exercise - IT03020051
Lesson 2 Practice Exercise - Continued - IT03020052
Lesson 2 Practice Exercise Answer Key Feedback - IT03020053
Introduction to Radio Direction Finding
