10
The list of negative effects is long, and the consequences are very
dangerous and can jeopardize the safety and security of a flight. Here are
some points, but the list is longer:
Jamming is an intentional radio
frequency interference (RFI) with
GNSS
signals.
This
prevents
receivers from locking onto satellites
signals and has the main effect
of rendering the GNSS system
ineffective or degraded for users in
the jammed area.
Spoofing
involves
broadcasting
counterfeit
satellite
signals
to
deceive GNSS receivers, causing
them to compute incorrect position,
navigation, and timing data.
What is
jamming and
spoofing?
AND WHAT ARE THE EFFECTS OF
JAMMING AND SPOOFING?
Unavailability of GNSS
navigation
False warnings
(e.g. PULL UP alerts
during cruise).
Unavailability of INS.
Sometimes the false signal
is of sufÏcient strength
and integrity so as to fool
the aircraft systems.
Aircraft shown at wrong
position.This may evolve in
a false loss of separation/
airspace infringement
warning, or an actual event
not being detected.
Inability to use GNSS
arrival and approach
procedures.
Degradation of time-
dependent systems,
such as clock, fuel
computation system, FMS.
Lost radio
communication between
flight deck and ground.
Route deviations or
uncommented turns.
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