AOPA Pilot Magazine - January 2018 - 89

P&E

ADS-B

Taking the high view
Satellites to offer global ADS-B coverage
BY MIKE COLLINS

BRIAN PATTI, Iridium's program manager for hosted payloads, is using his Beech Debonair to help test the performance of Aireon's space-

SHAWN PATTI

based ADS-B receivers, carried aboard the new Iridium NEXT satellite constellation. Here, he confirms satellite positions before a flight.
Patti formed a limited liability company for his performance validation flights.

AROUND THE GLOBE, air navigation service
providers are studying, if not already implementing, Automatic Dependent Surveillance
Broadcast (ADS-B) Out requirements. It's
clear that ADS-B technology-which relies
on aircraft broadcasting a very accurate
GPS position every second, instead of slowto-refresh, ground-based radars to separate
air traffic-will play a large role in aviation's
future. In the United States, the FAA will
require ADS-B Out equipage after January
1, 2020, for flight in airspace where a transponder is required today.
But ADS-B requires a certain amount of
ground infrastructure to relay aircraft data

to air traffic control facilities and, at least in
the United States, rebroadcast that data to
aircraft using the other frequency (the FAA
has implemented ADS-B datalinks on the
1090 MHz Extended Squitter and 978 MHz
Universal Access Transceiver frequencies)
as well as to upload weather and other flight
information. So how do you implement
ADS-B above the 71 percent of the Earth's
surface that is covered with water?
Look up.
Aireon, a joint venture between Iridium
Communications, Nav Canada, the Irish
Aviation Authority, Italian air navigation
service provider Enav, and Naviair-which

provides air navigation services in Denmark,
Greenland, and the Faroe Islands-is on
track to have a space-based ADS-B network
operational in 2018. Aireon is doing this
with an ADS-B receiver payload piggybacking on each of the 75 new Iridium NEXT
communication satellites. The program's
fourth SpaceX rocket launch, scheduled for
December 22, 2017, should loft satellites 31
through 40 into orbit. In early November,
Aireon was busy evaluating data from the
15 satellites already established in low Earth
orbit, and activated.
With solar panels extended, the satellites are less than 31 feet wide, and weigh
www.aopa.org/pilot AOPA PILOT | 89



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AOPA Pilot Magazine - January 2018

Table of Contents for the Digital Edition of AOPA Pilot Magazine - January 2018

Contents
AOPA Pilot Magazine - January 2018 - Intro
AOPA Pilot Magazine - January 2018 - Cover1
AOPA Pilot Magazine - January 2018 - Cover2
AOPA Pilot Magazine - January 2018 - Contents
AOPA Pilot Magazine - January 2018 - 2
AOPA Pilot Magazine - January 2018 - 3
AOPA Pilot Magazine - January 2018 - 4
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AOPA Pilot Magazine - January 2018 - Cover3
AOPA Pilot Magazine - January 2018 - Cover4
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