CONTENTS (Continued)

Page

4.2.3

Uses of the MIL STD 1553 and ARINC 429 Interfaces ..................................4 2

4.2.3.1

Control and Display Unit..................................................................4 2

4.2.3.2

Data Loader System..........................................................................4 5

4.2.3.3

Flight Instrument Interface Unit........................................................4 6

4.2.3.4

Inertial Navigation Systems...............................................................4 8

4.3

Precise Time and Time Interval Interface.........................................................................4 9

4.3.1

Introduction.......................................................................................................4 9

4.3.2

Precise Time Inputs...........................................................................................4 9

4.3.3

Precise Time Outputs........................................................................................4 9

4.4

Roll/Pitch/Heading/Water Speed Analog Input Interface..............................................4 10

4.5

Instrumentation Port Interface .......................................................................................4 10

4.6

RS 232 Interface............................................................................................................4 10

4.7

Barometric Altimeter Interface ......................................................................................4 10

4.8

GPS Interface Options...................................................................................................4 11

4.8.1

Introduction.....................................................................................................4 11

4.8.2

Implementing a New Interface in an Existing GPS Receiver...........................4 11

4.8.3

Redesign of HV Interfaces to Accommodate an

   Existing GPS Receiver .................................................................................4 11

4.8.4

Separate Development of an Interface Box.....................................................4 11

CHAPTER 5:  ANTENNA SUBSYSTEMS......................................................................................5 1

5.1

Introduction .....................................................................................................................5 1

5.2

FRPA...............................................................................................................................5 1

5.2.1

General Characteristics......................................................................................5 1

5.2.2

FRPA Types......................................................................................................5 2

5.3

CRPA Equipment............................................................................................................5 4

CHAPTER 6:  SERVICE COVERAGE, SERVICE AVAILABILITY, AND SERVICE

RELIABILITY; SATELLITE SELECTION CRITERIA AND FIGURE OF

MERIT DESCRIPTION..........................................................................................6 1

6.1

Service Coverage, Service Availability, And Service Reliability ......................................6 1

6.1.1

Parameter Definitions........................................................................................6 1

6.1.2

Service Coverage Characteristics ......................................................................6 3

6.1.2.1

Service Coverage Standards .............................................................6 3

6.1.2.2

The GPS 24 Satellite Constellation...................................................6 3

6.1.2.3

Expected Service Coverage Characteristics......................................6 4

6.1.3

Service Availability Characteristics....................................................................6 5

6.1.3.1

Service Availability Standards...........................................................6 5

6.1.3.2

Satellite Outage Effects on Service Availability ................................6 5

6.1.3.3

Expected Service Availability Characteristics....................................6 6

6.1.4

Service Reliability Characteristics......................................................................6 8

6.1.4.1

Service Reliability Standards.............................................................6 8

6.1.4.2

GPS Service Failure Characteristics..................................................6 9

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