Policy on Intellectual Property Right (IPR)
Interference mechanisms, system parameters and compatibility assessment criteria
 1     Background and introduction
 2     Types of interference mechanisms
        2.1     Type A interference
                  2.1.1     Introduction
                  2.1.2     Type A1 interference
                  2.1.3     Type A2 interference
        2.2     Type B interference
                  2.2.1     Introduction
                  2.2.2     Type B1 interference
                  2.2.3     Type B2 interference
 3     Compatibility assessment parameters
        3.1     Introduction
        3.2     Characteristics of aeronautical systems
                  3.2.1     ILS localizer
                  3.2.2     VOR
                  3.2.3     COM
        3.3     Characteristics of FM broadcasting stations
                  3.3.1     Maximum effective radiated power
                  3.3.2     Horizontal radiation pattern
                  3.3.3     Vertical radiation pattern
                  3.3.4     Spurious emission suppression
                  3.3.5     Frequencies
                  3.3.6     Polarization
                  3.3.7     Free space field strength calculation for broadcasting signals
        3.4     Receiver input power
 4     Compatibility assessment criteria
        4.1     Standard interference thresholds
                  4.1.1     ILS localizer
                  4.1.2     VOR
                  4.1.3     COM
        4.2     Interference assessment criteria – Montreal ILS localizer and VOR receivers (see definitions in Annex 4)
                  4.2.1     Type A1 interference
                  4.2.2     Type A2 interference
                  4.2.3     Type B1 interference
                  4.2.4     Type B2 interference
        4.3     Interference assessment criteria – ICAO Annex 10 1998 ILS localizer and VOR receivers
                  4.3.1     Type A1 interference (see Note 1)
                  4.3.2     Type A2 interference (see Note 1)
                  4.3.3     Type B1 interference
                  4.3.4     Type B2 Interference
        4.4     Interference assessment criteria – ICAO Annex 10 1998 COM receivers
                  4.4.1     Compatibility assessment formulas
ILS localizer/VOR coverage and minimum field strengths
3.3.4. – Coverage
General assessment method
 1     Introduction
        1.1     Philosophy of the general assessment method
        1.2     ILS localizer
        1.3     VOR
 2     Location and height of ILS and VOR test points
        2.1     ILS test points
                  2.1.1     Fixed test points
                  2.1.2     Test points related to broadcasting stations
        2.2     VOR test points
                  2.2.1     Test points related to broadcasting stations that are inside the DOC
                  2.2.2     Test points related to broadcasting stations that are outside the DOC
                  2.2.3     Additional test points
 3     Application of general assessment method
        3.1     General
                  3.1.1     Test point selection
                  3.1.2     Broadcasting stations to be included in the analysis at a test point
                  3.1.3     Compatibility calculations
                          Type A1 interference
                          Type A2 interference
                          Type B1 interference
                          Type B2 interference
        3.2     Special considerations regarding compatibility assessments
                  3.2.1     Test point heights greater than the minimum values
                  3.2.2     ILS
                          Fixed test points
                          Test points related to broadcasting stations
                  3.2.3     VOR
                  3.2.4     Calculation of Type A1 potential interference
                  3.2.5     Calculation of Type B1 potential interference
                  3.2.6     Calculation of Type B2 potential interference
                  3.2.7     Multiple interference
 4     Broadcasting station antenna corrections
        4.1     General
        4.2     Polarization discrimination
        4.3     Horizontal radiation pattern
        4.4     Vertical radiation pattern correction
                  4.4.1     V.r.p. corrections for vertical apertures of two or more wavelengths
                  4.4.2     V.r.p. corrections for vertical apertures of less than two wavelengths
                  4.4.3     V.r.p. corrections for spurious emissions in the band 108-118 MHz
        4.5     Combination of horizontal and vertical radiation patterns
Location of test points with maximum interference potential
 1     Aircraft at the same height as a broadcasting station antenna
 2     Aircraft at a greater height than a broadcasting station antenna
 3     Relationship between vertical and horizontal separation distances
 4     Location of maximum interference potential
 5     Test points for VOR
 6     Test points for ILS
 7     Effect of increased test point height
Considerations regarding maximum field strength and interference potential
 1     Maximum field strength
 2     Maximum Type B1 interference potential
Prediction of ILS field strength using two-ray geometry
Detailed compatibility assessment and practical verification
 1     Introduction
 2     Matters requiring special attention
        2.1     Prediction of broadcasting field strengths
        2.2     Test point considerations
        2.3     Considerations for coordinated stations
        2.4     Consideration of operating stations
 3     Multiple interference
 4     Detailed compatibility assessment
 5     Practical verification process
 6     Summary
Aeronautical Information Publication (AIP)
Antenna corrections
Course deflection current
Course line
Course sector
Cut-off value
Designated Operational Coverage (DOC)
Difference in Depth of Modulation (DDM)
Distance and distance calculation
Effective Earth radius
Elevation angle
Front course sector
Future immunity aeronautical receivers
Glide path
ICAO Annex 10
Instrument Landing System (ILS)
ILS localizer
Minimum separation distances
Montreal aeronautical receivers
Potential incompatibility
Provider state
Runway threshold
Runway touchdown point
Slant path distance
Test point
Trigger value
VHF Omnidirectional Radio Range (VOR)