ARINC 743A-5 : 2009

1.0 INTRODUCTION
1.1 Purpose of This Document
1.2 Summary of GNSS System Operational Characteristics
1.3 Brief Description of the System
1.4 Interchangeability
1.5 Regulatory Approval
1.6 Reliability
1.7 Testability and Maintainability
1.8 Unit Identification
2.0 INTERCHANGEABILITY STANDARD
2.1 Introduction
2.2 System Elements
2.3 Standardized Signaling
2.4 Standard Interwiring
2.5 Power Circuitry
2.6 Environmental Conditions
3.0 GNSS SENSOR SYSTEM DESIGN
3.1 General
3.2 System Application
3.3 General System Capabilities
3.4 Specific System Capabilities
4.0 GNSS SENSOR DESIGN
4.1 Introduction
4.2 Integrity
4.3 Modes
4.4 System Interfaces
4.5 Sensor Performance (2 MCU Configuration)
4.6 Sensor Performance (Alternate Configuration)
4.7 Location of the GNSS Function
5.0 INTEGRATED ANTENNA/PREAMPLIFIER/FILTER DESIGN
5.1 Introduction
5.2 Active Antenna Requirements (GPS L1 Only)
5.3 Physical Characteristics (GPS L1 Only)
5.4 Antenna/Preamplifier/Filter Requirements (GPS/GLONASS)
5.5 Physical Characteristics (GPS/GLONASS)
5.6 Reference Test Setup
6.0 PASSIVE ANTENNA DESIGN
6.1 Introduction
6.2 Antenna Performance Characteristics
6.3 Physical Characteristics
6.4 Reference Test Setup
7.0 BITE
7.1 GNSS Sensor BITE
7.2 Purpose of the OMS
ATTACHMENTS
1 GNSS Sensor Unit Signal Input/Output Schematic
2 GNSS Sensor Unit, Alternate Configuration Diagram
3-1 GNSS Sensor Unit, 2 MCU Configuration
3-2 GNSS Sensor Unit, Alternate Configuration
4-1 ARINC 429 Input Data for GNSS
4-2 ARINC 429 Output Data for GNSS
4-2A ARINC 429 Label Definition
4-3 Discrete ARINC 429 Input Definition for GNSS Sensor
4-4 ARINC 429 SSM Definition for GNSS Sensor
5-1 GPS 2 MCU Configuration Interference Level
5-2 In-Band and Near-Band Interference Environments
5-3 Antenna/Preamp/Filter Signal Rejection
5-4 GPS Alternate Configuration Interference Level
5-5 GPS/GLONASS Alternate Configuration Interference Level
6 Environmental Test Categories
7-1 GNSS Antenna Footprint
7-2 Antenna Evaluation Ground Plane
8 GNSS Time Mark
9 GNSS Signal Losses
10 Mode Transition Table
APPENDICES
A Differential Corrections
B Satellite Based Augmentation System Interface
C Predictive RAIM Capability
D Airplane Personality Data Message (APDM)
E Final Approach Segment (FAS) Data Message (FASDM)
F Glossary Abbreviations and Acronyms

Describes the characteristics of the integrated Global Positioning System (GPS)/Global Orbiting Navigation Satellite System (GLONASS) sensor unit (GNSSU) portion of a GNSS system intended for installation in commercial aircraft.