XGPS170D
3
A Note on ADS-B
The ADS-B network provides weather data as
well as a growing amount of air traffic information.
However, ADS-B is an emerging system which still
has coverage gaps. The current coverage map is
available on the FAA website at http://www.faa.
gov/nextgen.
Weather.
The ADS-B ground system broadcasts
regional NEXRAD weather information every 2.5
minutes and continental NEXRAD information ev-
ery 15 minutes. Both weather broadcasts are re-
ceived by the XGPS170D.
Traffic.
The XGPS170D will also receive ADS-B
traffic information from both the ADS-B ground
system and from other aircraft operating UAT or
1090ES transponders. Traffic information includes
position, heading, speed and altitude for each air
-
craft.
However, it is important to know that traffic infor
-
mation offered through the ADS-B ground system
is only broadcast in response to a signal from an
ADS-B Out transponder. Since not all aircraft are
equipped with ADS-B transponders at this point,
please be aware that the traffic information provid
-
ed by the ADS-B network is only a partial picture
of traffic. Until all aircraft are ADS-B out equipped,
always assume there is air traffic around you that