Avionics News November 2016 - 29

aircraft also needed ADS-B In. And for the traffic tool
enjoy a wide array of choices for equipping to meet the
to live up to its potential, the precision of Wide Area
Jan. 1, 2020, FAA mandate, and today's options make
Augmentation System-enhanced GPS position data was
them affordable for a broader spectrum of owners and
needed - the most-common position source used in
operators.
ADS-B Out solutions.
Besides, that small group said, prices will drop as
What it's all about
options grow. Give the market time, they urged. The
ADS-B Out technologies underpin the FAA's NextGen
market will come through.
air traffic management plan, one based on precision
Now, with the deadline a mere 37 months away, most
position data from participating aircraft to track and
of those early laments about ADS-B Out no longer carry
separate aircraft.
the weight they once supported. The market, as expected
While the apparent short-term benefits touted for
and predicted, evolved to the
ADS-B Out flowed largely to the
point that the gripes about fiveFAA - more frequent position
figure costs and limited options no
updates with greater accuracy and
longer apply.
more precise altitude tracking
That's not to say no one
- ADS-B's use of precision
complains; many still do. But
position data opened the door to
today's general grousing focuses
operational benefits for ADS-B
PILOTS AND AIRCRAFT
more on being forced to spend
Out solutions using an approved
OWNERS ENJOY A WIDE
the money at all, ignoring the
WAAS GPS navigator.
potential benefits available.
Compared to radar, ADS-B
ARRAY OF CHOICES FOR
Today's options range from
Out
provides more precise threeEQUIPPING TO MEET THE
about $3,000 to more than
dimensional position data. The
JAN. 1, 2020 FAA MANDATE,
$20,000, installed. No question,
WAAS specification requires it to
AND
TODAY'S
OPTIONS
those $3,000 and $5,000
provide a position accuracy of 25
and $7,000 options go down
feet (7.6 meters) or better, both
MAKE THEM AFFORDABLE
significantly easier than $20,000
laterally and vertically - and at
FOR A BROADER
of six years ago - particularly
least 95 percent of the time.
SPECTRUM OF OWNERS
for aircraft owners with a market
Measured performance at
AND OPERATORS.
value of $50,000 and lower.
specific locations turned out
But with the free services
far better, with typical lateral
available through ADS-B In -
accuracy of better than 3.3 feet (1
negating the need for what was
meter) and vertically just under 5
once a $20,000 investment to get live traffic and datalink
feet (1.5 meters); and this accuracy is consistent across
weather - it is finally gaining broader acceptance,
most of the contiguous U.S., large parts of Alaska and
acceptance converting into slow growth of the installed
Canada, and only slightly different in the Windward
base.
Islands.
Unfortunately, that installed base remains woefully
It's accuracy like this that supports the use of
behind the power curve for meeting the 2020 mandate
approved WAAS GPS navigators to fly LPV approaches
deadline. (See accompanying story on ADS-B's
- lateral precision with vertical guidance - as required
progression beginning on page 14.)
for Category I precision approaches. Cat I requires
This month, we examine the range of options available
lateral accuracy of 52 feet (16 meters) and vertical
along with a snapshot of the variety and costs available
accuracy of 13.1 feet (4 meters).
to meet the mandate.
The bottom line is this: Pilots and aircraft owners
Continued on following page

THE BOTTOM
LINE IS THIS:

avionics news

*

november

2016

29



Table of Contents for the Digital Edition of Avionics News November 2016

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Avionics News November 2016 - Intro
Avionics News November 2016 - No label
Avionics News November 2016 - Cover2
Avionics News November 2016 - 1
Avionics News November 2016 - 2
Avionics News November 2016 - 3
Avionics News November 2016 - 4
Avionics News November 2016 - 5
Avionics News November 2016 - 6
Avionics News November 2016 - 7
Avionics News November 2016 - 8
Avionics News November 2016 - 9
Avionics News November 2016 - 10
Avionics News November 2016 - 11
Avionics News November 2016 - 12
Avionics News November 2016 - 13
Avionics News November 2016 - 14
Avionics News November 2016 - 15
Avionics News November 2016 - 16
Avionics News November 2016 - 17
Avionics News November 2016 - 18
Avionics News November 2016 - 19
Avionics News November 2016 - 20
Avionics News November 2016 - 21
Avionics News November 2016 - 22
Avionics News November 2016 - 23
Avionics News November 2016 - 24
Avionics News November 2016 - 25
Avionics News November 2016 - 26
Avionics News November 2016 - 27
Avionics News November 2016 - 28
Avionics News November 2016 - 29
Avionics News November 2016 - 30
Avionics News November 2016 - 31
Avionics News November 2016 - 32
Avionics News November 2016 - 33
Avionics News November 2016 - 34
Avionics News November 2016 - 35
Avionics News November 2016 - 36
Avionics News November 2016 - 37
Avionics News November 2016 - 38
Avionics News November 2016 - 39
Avionics News November 2016 - 40
Avionics News November 2016 - 41
Avionics News November 2016 - 42
Avionics News November 2016 - 43
Avionics News November 2016 - 44
Avionics News November 2016 - 45
Avionics News November 2016 - 46
Avionics News November 2016 - 47
Avionics News November 2016 - 48
Avionics News November 2016 - 49
Avionics News November 2016 - 50
Avionics News November 2016 - 51
Avionics News November 2016 - 52
Avionics News November 2016 - 53
Avionics News November 2016 - 54
Avionics News November 2016 - 55
Avionics News November 2016 - 56
Avionics News November 2016 - 57
Avionics News November 2016 - 58
Avionics News November 2016 - 59
Avionics News November 2016 - 60
Avionics News November 2016 - 61
Avionics News November 2016 - 62
Avionics News November 2016 - 63
Avionics News November 2016 - 64
Avionics News November 2016 - 65
Avionics News November 2016 - 66
Avionics News November 2016 - 67
Avionics News November 2016 - 68
Avionics News November 2016 - 69
Avionics News November 2016 - 70
Avionics News November 2016 - 71
Avionics News November 2016 - 72
Avionics News November 2016 - Cover3
Avionics News November 2016 - Cover4
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