Avionics News August 2019 - 25

Of all the recommendations, those summarized below
are of the utmost importance to maintain U.S. leadership
in core sectors, according to the report. The continued and
successful execution of the GPS Enterprise will require
vigilance and committed governance:
* Continue the support of ongoing GPS modernization,
including space, control and user segments. The U.S.
must maintain its leading edge among world satellite‐
based navigation and timing systems.
* Ensure that complementary and backup capabilities
for GPS‐derived PNT are available and used to protect
the nation's critical infrastructure and public‐safety
applications. Implement Enhanced Loran (eLoran) as a
backup for GPS timing in the continental U.S., subject
to verification of cost and performance. Further, U.S.
agencies should continue the development of additional
capabilities that reinforce PNT resiliency.
* Protect GPS signals from interference. The potential
for more powerful radio signals in adjacent bands
and ongoing deliberate disruption by malicious
actors remain real and present dangers that will
continue to grow.
* Encourage the use of toughened GPS receivers that
can resist interference such as jamming and spoofing,
especially in critical applications. The technology is
available, but it is not being used.
* Permit users in the U.S. to access other nations' properly
vetted GNSS signals. This will increase resilience,
receiver performance, and legitimize many receivers
already in service.
* Demonstrate the utility of backup/augmentation of
allied GNSS signals in military receivers: This could
allow improved resilience, assurance, and GPS backup
capabilities to military operations in increasingly
contested environments.
While many of these issues became known years ago, in
the U.S., very little has been done to address the threats.
Depth of field
In aviation, GPS serves many purposes, not the least
of which is the precision-navigation functions mentioned
earlier. But GPS runs far deeper through aviation than
merely guiding aircraft from Point A to Point B - or to a
runway end in inclement weather.
GPS informs many other systems with safety-critical
functions. Among them: the flight management system for
navigation; enhanced ground proximity warning system
to prevent controlled flight into terrain accidents; the ATC
transponder to support ADS‐B surveillance of the aircraft by air
traffic control; collision-avoidance systems; and other systems.

Airlines and business-aircraft makers started making
GPS a standard feature in cockpits starting in the late
1990s. Today, virtually all commercial transport aircraft,
business jet, turboprop, piston and sport aircraft employ
GPS - increasingly IFR-capable navigators.
And with moves to open up the airspace to autonomous
aerial vehicles for people and package movements,
precision navigation and timing will only become more
critical as those craft depend on the accuracy of spacebased navigation systems such as GPS.
It's this degree of dependence that spurs concerns at
many levels of aviation, from regulators to OEMs to
users.
The good news is slim. The bad news is easy compared
to when the report was issued 17 years ago.
No immunity to jamming
The sad conclusions of both the 2001 and 2018 reports
are sobering, but not without hope.
First, there's no single solution to jamming, and only
case-specific options to combat spoofing.
Garmin's Bill Stone, avionics product manager,
noted that little progress has been made to address the
vulnerabilities cited in the 2001 report.
"Today's GPS network is no more or less vulnerable
now than it was 17 years ago," Stone said. "There have
been no substantive changes."
But future changes appear positioned to make the GPS
system more resilient.
"Multi-frequency, multi-constellation GNSS is coming
that will provide more resiliency, but not complete
immunity from jamming," Stone said. "This is several
years out and will require all new receivers."
But don't expect to see any grand, all-encompassing
counter to deliberate jamming.
"It's not a practical reality to design a 'safeguard'
against jamming," Stone said. "If the GPS signal is
successfully jammed, then you are in a GPS-deprived
environment, there is nothing to receive, and the
navigator will flag."
In other words, the pilot will know the navigator is
inoperative.
The one thing that changed the most in the years
between these two reports involves the availability of
jamming equipment.
Dan Schwinn, founder and owner of Avidyne, offered
this observation, via the company's marketing director,
Tom Harper.
Continued on following page

avionics news

*

august

2019

25



Avionics News August 2019

Table of Contents for the Digital Edition of Avionics News August 2019

No label
Avionics News August 2019 - Intro
Avionics News August 2019 - No label
Avionics News August 2019 - Cover2
Avionics News August 2019 - 1
Avionics News August 2019 - 2
Avionics News August 2019 - 3
Avionics News August 2019 - 4
Avionics News August 2019 - 5
Avionics News August 2019 - 6
Avionics News August 2019 - 7
Avionics News August 2019 - 8
Avionics News August 2019 - 9
Avionics News August 2019 - 10
Avionics News August 2019 - 11
Avionics News August 2019 - 12
Avionics News August 2019 - 13
Avionics News August 2019 - 14
Avionics News August 2019 - 15
Avionics News August 2019 - 16
Avionics News August 2019 - 17
Avionics News August 2019 - 18
Avionics News August 2019 - 19
Avionics News August 2019 - 20
Avionics News August 2019 - 21
Avionics News August 2019 - 22
Avionics News August 2019 - 23
Avionics News August 2019 - 24
Avionics News August 2019 - 25
Avionics News August 2019 - 26
Avionics News August 2019 - 27
Avionics News August 2019 - 28
Avionics News August 2019 - 29
Avionics News August 2019 - 30
Avionics News August 2019 - 31
Avionics News August 2019 - 32
Avionics News August 2019 - 33
Avionics News August 2019 - 34
Avionics News August 2019 - 35
Avionics News August 2019 - 36
Avionics News August 2019 - 37
Avionics News August 2019 - 38
Avionics News August 2019 - 39
Avionics News August 2019 - 40
Avionics News August 2019 - 41
Avionics News August 2019 - 42
Avionics News August 2019 - 43
Avionics News August 2019 - 44
Avionics News August 2019 - 45
Avionics News August 2019 - 46
Avionics News August 2019 - 47
Avionics News August 2019 - 48
Avionics News August 2019 - 49
Avionics News August 2019 - 50
Avionics News August 2019 - 51
Avionics News August 2019 - 52
Avionics News August 2019 - 53
Avionics News August 2019 - 54
Avionics News August 2019 - 55
Avionics News August 2019 - 56
Avionics News August 2019 - 57
Avionics News August 2019 - 58
Avionics News August 2019 - 59
Avionics News August 2019 - 60
Avionics News August 2019 - 61
Avionics News August 2019 - 62
Avionics News August 2019 - 63
Avionics News August 2019 - 64
Avionics News August 2019 - 65
Avionics News August 2019 - 66
Avionics News August 2019 - 67
Avionics News August 2019 - 68
Avionics News August 2019 - 69
Avionics News August 2019 - 70
Avionics News August 2019 - 71
Avionics News August 2019 - 72
Avionics News August 2019 - Cover3
Avionics News August 2019 - Cover4
http://www.brightcopy.net/allen/avne/58-4
http://www.brightcopy.net/allen/avne/58-3
http://www.brightcopy.net/allen/avne/58-2
http://www.brightcopy.net/allen/avne/58-1
http://www.brightcopy.net/allen/avne/57-12
http://www.brightcopy.net/allen/avne/57-11
http://www.brightcopy.net/allen/avne/57-10
http://www.brightcopy.net/allen/avne/57-9
http://www.brightcopy.net/allen/avne/57-8
http://www.brightcopy.net/allen/avne/57-7
http://www.brightcopy.net/allen/avne/57-6
http://www.brightcopy.net/allen/avne/57-5
http://www.brightcopy.net/allen/avne/57-4
http://www.brightcopy.net/allen/avne/57-3
http://www.brightcopy.net/allen/avne/57-2
http://www.brightcopy.net/allen/avne/57-1
http://www.brightcopy.net/allen/avne/56-12
http://www.brightcopy.net/allen/avne/56-11
http://www.brightcopy.net/allen/avne/56-10
http://www.brightcopy.net/allen/avne/56-9
http://www.brightcopy.net/allen/avne/56-8
http://www.brightcopy.net/allen/avne/56-7
http://www.brightcopy.net/allen/avne/56-6
http://www.brightcopy.net/allen/avne/56-5
http://www.brightcopy.net/allen/avne/56-4
http://www.brightcopy.net/allen/avne/56-3
http://www.brightcopy.net/allen/avne/56-2
http://www.brightcopy.net/allen/avne/56-1
http://www.brightcopy.net/allen/avne/55-12
http://www.brightcopy.net/allen/avne/55-11
http://www.brightcopy.net/allen/avne/55-10
http://www.brightcopy.net/allen/avne/55-9
http://www.brightcopy.net/allen/avne/55-8
http://www.brightcopy.net/allen/avne/55-7
http://www.brightcopy.net/allen/avne/55-6
http://www.brightcopy.net/allen/avne/55-5
http://www.brightcopy.net/allen/avne/55-4
http://www.brightcopy.net/allen/avne/55-3
http://www.brightcopy.net/allen/avne/55-02
http://www.brightcopy.net/allen/avne/55-01
http://www.brightcopy.net/allen/avne/54-12
http://www.brightcopy.net/allen/avne/54-11
http://www.brightcopy.net/allen/avne/54-10
http://www.brightcopy.net/allen/avne/54-9
http://www.brightcopy.net/allen/avne/54-8
http://www.brightcopy.net/allen/avne/54-7
http://www.brightcopy.net/allen/avne/54-6
http://www.brightcopy.net/allen/avne/54-5
http://www.brightcopy.net/allen/avne/54-4
http://www.brightcopy.net/allen/avne/54-3
http://www.brightcopy.net/allen/avne/54-2
http://www.brightcopy.net/allen/avne/54-1
http://www.brightcopy.net/allen/avne/53-12
http://www.brightcopy.net/allen/avne/53-11
http://www.brightcopy.net/allen/avne/53-10
http://www.brightcopy.net/allen/avne/53-9
http://www.brightcopy.net/allen/avne/53-8
http://www.brightcopy.net/allen/avne/53-7
http://www.brightcopy.net/allen/avne/53-6
http://www.brightcopy.net/allen/avne/53-5
http://www.brightcopy.net/allen/avne/53-4
http://www.brightcopy.net/allen/avne/53-3
http://www.brightcopy.net/allen/avne/53-2
http://www.brightcopy.net/allen/avne/53-1
http://www.brightcopy.net/allen/avne/52-12
http://www.brightcopy.net/allen/avne/52-11
http://www.brightcopy.net/allen/avne/52-10
http://www.brightcopy.net/allen/avne/52-9
http://www.brightcopy.net/allen/avne/52-8
https://www.nxtbook.com/allen/avne/52-7
https://www.nxtbook.com/allen/avne/52-6
https://www.nxtbook.com/allen/avne/52-5
https://www.nxtbook.com/allen/avne/52-4
https://www.nxtbook.com/allen/avne/52-3
https://www.nxtbook.com/allen/avne/52-2
https://www.nxtbook.com/allen/avne/52-1
https://www.nxtbook.com/allen/avne/51-12
https://www.nxtbook.com/allen/avne/51-11
https://www.nxtbook.com/allen/avne/51-10
https://www.nxtbook.com/allen/avne/51-9
https://www.nxtbook.com/allen/avne/51-8
https://www.nxtbook.com/allen/avne/51-7
https://www.nxtbook.com/allen/avne/51-6
https://www.nxtbook.com/allen/avne/51-5
https://www.nxtbook.com/allen/avne/51-4
https://www.nxtbook.com/allen/avne/51-3
https://www.nxtbook.com/allen/avne/51-2
https://www.nxtbook.com/allen/avne/51-1
https://www.nxtbook.com/allen/avne/50-12
https://www.nxtbook.com/allen/avne/50-11
https://www.nxtbook.com/allen/avne/50-10
https://www.nxtbook.com/allen/avne/50-9
https://www.nxtbook.com/allen/avne/50-8
https://www.nxtbook.com/allen/avne/50-7
https://www.nxtbook.com/allen/avne/50-6
https://www.nxtbook.com/allen/avne/50-5
https://www.nxtbook.com/allen/avne/50-4
https://www.nxtbook.com/allen/avne/50-3
https://www.nxtbook.com/allen/avne/50-2
https://www.nxtbook.com/allen/avne/50-1
https://www.nxtbook.com/allen/avne/49-12
https://www.nxtbook.com/allen/avne/49-11
https://www.nxtbook.com/allen/avne/49-10
https://www.nxtbook.com/allen/avne/49-9
https://www.nxtbook.com/allen/avne/49-8
https://www.nxtbook.com/allen/avne/49-7
https://www.nxtbook.com/allen/avne/49-6
https://www.nxtbook.com/allen/avne/49-5
https://www.nxtbook.com/allen/avne/49-4
https://www.nxtbook.com/allen/avne/49-3
https://www.nxtbook.com/allen/avne/49-2
https://www.nxtbook.com/allen/avne/49-1
https://www.nxtbook.com/allen/avne/48-12
https://www.nxtbook.com/allen/avne/48-11
https://www.nxtbookmedia.com