Avionics News June 2017 - 17

Enhanced vision systems provide
a view where eyes alone fail
with or below the horizon - when contrasted against
EVS: Seeing heat - in the dark
a night sky.
EVS sensors get their sight by detecting
Looking down at a tower camouflaged by the
temperature differences on an infrared level beyond
light-polluted urban
the visual spectrum of the
landscape, however, with
human eye. An EVS sensor sees
traffic lights, tail lights,
everything in front of the sensor
headlights, lighted signs,
- at least, within the limits of its
THE SENSOR OF AN
street lights, billboards
sensitivity - and that sensor's
EVS CAN DELIVER
and building lights ... these
ability to detect heat variations
towers become virtually
through dust, fog, mist and
VISION WHERE THE
invisible.
precipitation.
HUMAN EYE FAILS -
Radar altimeters do
Infrared sensors detect
provide help in avoiding
temperature differences between
terrain - at least once
pavement and paint on that
below 2,500 feet above
pavement; the heat of bodies,
ground level. Conversely,
animals, buildings, other aircraft
radar altimeters say
and their engines. Atmospheric
nothing about what lies
particulates can contribute to
ahead.
limiting the utility of EVS to
Terrain awareness and
deliver its monochromatic image
alerting systems brought
to the cockpit screen.
some relief about what lay
But the sensitivity of many EVS
ahead in the form of audio
sensors runs so high that they
alerts. Ground-proximity
detect and display ghostly images
warning systems improved
of objects no longer there - such
on the state of the art with
as a hot spot on a taxiway where
GPS position and velocity
an aircraft waited for a departure
data compared to detailed terrain data, providing
clearance. Such an image looks fainter than when
another form of alerts for terrain and structures.
the aircraft still occupied that location, and as the
But a picture, to evolve a phrase, is worth a
infrared signature trends back toward the ambient
thousand TAWS or GPWS alerts since neither
temperature, the ghostly graphic soon fades away.
provides the perspective available from a view of
Once a feature found largely in air-transport and
terrain. That's the step EVS provides beyond GPWS
business-turbine aircraft, EVS today is available
available from avionics makers; EVS delivers a view
in a wide variety of forms delivered on an array of
of something otherwise not visible to the naked eye.

AND IMPROVE
THE VIEW
WHERE THE
EYEBALL
NEEDS A
LITTLE HELP.

Continued on following page

avionics news

*

june

2017

17



Table of Contents for the Digital Edition of Avionics News June 2017

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Avionics News June 2017 - Intro
Avionics News June 2017 - No label
Avionics News June 2017 - Cover2
Avionics News June 2017 - 1
Avionics News June 2017 - 2
Avionics News June 2017 - 3
Avionics News June 2017 - 4
Avionics News June 2017 - 5
Avionics News June 2017 - 6
Avionics News June 2017 - 7
Avionics News June 2017 - 8
Avionics News June 2017 - 9
Avionics News June 2017 - 10
Avionics News June 2017 - 11
Avionics News June 2017 - 12
Avionics News June 2017 - 13
Avionics News June 2017 - 14
Avionics News June 2017 - 15
Avionics News June 2017 - 16
Avionics News June 2017 - 17
Avionics News June 2017 - 18
Avionics News June 2017 - 19
Avionics News June 2017 - 20
Avionics News June 2017 - 21
Avionics News June 2017 - 22
Avionics News June 2017 - 23
Avionics News June 2017 - 24
Avionics News June 2017 - 25
Avionics News June 2017 - 26
Avionics News June 2017 - 27
Avionics News June 2017 - 28
Avionics News June 2017 - 29
Avionics News June 2017 - 30
Avionics News June 2017 - 31
Avionics News June 2017 - 32
Avionics News June 2017 - 33
Avionics News June 2017 - 34
Avionics News June 2017 - 35
Avionics News June 2017 - 36
Avionics News June 2017 - 37
Avionics News June 2017 - 38
Avionics News June 2017 - 39
Avionics News June 2017 - 40
Avionics News June 2017 - 41
Avionics News June 2017 - 42
Avionics News June 2017 - 43
Avionics News June 2017 - 44
Avionics News June 2017 - 45
Avionics News June 2017 - 46
Avionics News June 2017 - 47
Avionics News June 2017 - 48
Avionics News June 2017 - 49
Avionics News June 2017 - 50
Avionics News June 2017 - 51
Avionics News June 2017 - 52
Avionics News June 2017 - 53
Avionics News June 2017 - 54
Avionics News June 2017 - 55
Avionics News June 2017 - 56
Avionics News June 2017 - 57
Avionics News June 2017 - 58
Avionics News June 2017 - 59
Avionics News June 2017 - 60
Avionics News June 2017 - 61
Avionics News June 2017 - 62
Avionics News June 2017 - 63
Avionics News June 2017 - 64
Avionics News June 2017 - 65
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Avionics News June 2017 - 67
Avionics News June 2017 - 68
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Avionics News June 2017 - 70
Avionics News June 2017 - 71
Avionics News June 2017 - 72
Avionics News June 2017 - 73
Avionics News June 2017 - 74
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Avionics News June 2017 - 84
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Avionics News June 2017 - 87
Avionics News June 2017 - 88
Avionics News June 2017 - Cover3
Avionics News June 2017 - Cover4
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