AOPA Pilot Magazine - August 2018 - 88

P&E

conditions that meet or are approaching
not previously forecast airmet, sigmet, or
convective sigmet criteria, including moderate or greater icing; moderate or greater
turbulence; heavy or freezing precipitation; conditions at or approaching low
IFR; surface winds or gusts greater than
30 knots; low-level wind shear (2,000
feet agl and below); and volcanic ash,
dust storms, or sandstorms. CWAs are
valid for up to two hours and if a forecaster determines it's warranted, they may
be issued hourly for convective activity.
Transmission interval: 10 minutes.
Cloud tops. The forecast altitude
of cloud tops will be received from the
National Weather Service's High Resolution
Rapid Refresh (HRRR) model. This information is available only for the continental
United States, so cloud tops will not be
provided in Alaska, Hawaii, Guam, or
Puerto Rico. The HRRR is run every hour.
Transmission interval: 15 minutes.
Graphical airmet. This graphical advisory of weather conditions that may be

HARRIS USES THIS CESSNA CARAVAN single-engine turboprop for flight testing of the

ADS-B ground station network. It's based in Rochester, New York.

hazardous to aircraft, but are less severe
than sigmets, is issued by the Aviation
Weather Center at 0245, 0845, 1445, and
2045 UTC; they're updated as necessary.
Graphical airmets are available only for the
lower 48 states and adjacent coastal waters.
Transmission interval: five minutes.
Icing, forecast potential. The icing
product provides forecast icing probability, icing severity, and anticipated presence

of supercooled large droplets at 12 altitude
levels-every 2,000 feet, from 2,000 feet msl
to 24,000 feet msl. This information comes
from the NWS Forecast Icing Potential
model, which is available only in the continental United States, so forecast icing
information will not be provided in Alaska,
Hawaii, Guam, or Puerto Rico. This model is
run on an hourly basis. Transmission interval: 15 minutes.

Protect your future.
Always affordable, configurable and upgradable.
When deciding it's time to replace your steam gauges with glass
displays for your aircraft, many times the easy decision is to go with
a less capable display because of price. However, don't be fooled by
big promises for a lower performing unit
For full-featured and upgradable glass panel displays, go with the
industry's proven value leader, Aspen Avionics. As the most innovative
and affordable glass cockpit system for certified general aviation
aircraft, Aspen's Evolution flight displays deliver unrivaled performance
in single and multiple panel systems for primary flight, multi-function
and back-up display use. Easy software upgrades can cost-effectively
add features and capabilities, like Synthetic Vision, Autopilot Integration,
Angle of Attack or ADS-B capability, to help you fly even safer and
smarter while protecting the value of your investment.

Copyright 2018 Aspen Avionics Inc. "Aspen Avionics," "Evolution Flight Display System," and the Aspen Avionics aircraft logo
are trademarks of Aspen Avionics Inc. All rights reserved. U.S. Patent No. 8,085,168, and additional patents pending.

EFD1000 Pro Plus PFD with Synthetic Vision and Angle of Attack

www.aspenavionics.com

COURTESY OF HARRIS CORPORATION

88 |

ADS-B

http://www.aspenavionics.com

AOPA Pilot Magazine - August 2018

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