scope:

Purpose to this Characteristic

This standard sets forth the desired characteristics of a second-generation aviation Ku-band and Ka-band satellite communication (satcom) system intended for installation in all types of aircraft. The system described in this document represent the next step from the systems defined by ARINC Characteristic 791, Part 1, including:

• Flat-panel phased-array, antenna

o Scalable to very large aperture (42″)

o Modular support for one or more apertures

o Integrated beam steering and Radio Frequency (RF) electronics

o Fault-tolerant High-Power Amplifier (HPA)

• Multi-beam receiver

• Support for emerging Non-Geostationary Orbit (NGSO) satellite networks

• Provisions for multiple apertures of varying size

o Six fitting positions

• Three variable positions for the forward set of fitting positions

• Three variable positions for the rear set of fitting positions

o Fixed connector penetration zone

• Fewer/simpler components and wiring o Removal of Ku/Ka band Radio Frequency Unit (KRFU) and associated interwiring

o Autonomous position, attitude, and heading reference

o Relocation of motor drive electronics (if used) and removal of interwiring

o Virtual APM

o Fixed, low loss, Intermediate Frequency (IF) coax cabling

• Single, standard provisions with no optional wiring

• Accommodation of gate-to-gate operations

This document provides guidance on the physical interfaces, and the form and fit of the satcom system. ARINC Characteristic 791, Part 2, provides a common functional definition for both ARINC 791, Part 1 and ARINC 792 systems.

The desired operational capability of the satcom equipment is to provide a broadband Internet link that can be used for data, video, and voice communications. Service is primarily for passenger communications and/or entertainment but is also available for aircraft information systems and airplane health monitoring systems.

At the time of this writing, Ku/Ka-band satcom frequencies are licensed for aviation non-safety functions only. The International Telecommunication Union (ITU) identifies specific radio frequency spectrum that is assigned for Aeronautical Mobile Satellite Route Service (AMS(R)S). Ku-band and Ka-band frequencies are not authorized or licensed for AMS(R)S. However, many services and applications have no time-criticality, no safety impact, and are therefore good candidates for Ku-band and Ka-band satcom systems. Refer to ARINC Characteristic 791, Part 2.