JED - December 2017 - 40

its benefit to the potential of
extending ELINT operation to
the mmwave band for longerrange intercept.

INSTALLATION AND
INSTALLED PERFORMANCE

The Journal of Electronic Defense | December 2017

40

Once the ELINT system
architecture and design has
been defined to address the
considerations outlined, the
user must address installation
and installed performance.
Installation
Installation considerations
beyond
the
conventional
items of environmental and
SWAP revolve around the location of antennas and associated RF components. From a user
perspective, we must consider
where to mount the antennas
from the point of view of the
operational imperatives and
the constraints imposed by
the selection of the platform.
The key for the ELINT
system performance is that
of the antenna system that
is responsible for delivering
IFOV (POI) and DF accuracy.
We must consider installation Fig. 5: Antenna array installation considerations.
such that it avoids any obwhich often relates to interference or
structions within the specified IFOV.
blockage of the operational IFOV from
Beyond this is the need to install the
wings or other antennas.
antenna array such that it is positioned
Mutual Interference
for the mission at hand. For example, the
Beyond the special considerations
installation for a stand-in versus a standof the installed performance, the user
off mission creates some considerations
must address the mutual interference
in terms of boresighting the antenna.
problem and the ELINT system design
In Figure 5, we can see that the DF
must not only deal with the potential
accuracy of an interferometer is best at
interference for the EME, but it must
the boresight. Recall also in the standanticipate the fact that the onboard
off mission that the radars of interest
emitters will compromise its ability to
may be deep inside the lethality zone.
effectively conduct its mission. It is of
Then it is likely that the ELINT targets
little benefit if the ELINT system perare on the order of 200 nmi from the
formance is degraded by on-board emitELINT platform, and for DF accuracy the
ters, especially high-duty-cycle data
lookdown angle should be set accordinglinks, which in this case will present the
ly. On the other hand, a stand-in misELINT system not only with interference
sion may drive the boresight to a steeper
at the operating frequency, but often at
look down angle.
frequencies that are harmonically relatInstalled Performance
ed or produced by intermodulation.
With respect to installed perforSIGINT/COMINT
mance, the ELINT system must be able
This article has not addressed the
to deal with any physical effects of the
COMINT aspect of a SIGINT-based UAV
platform on the system performance,

operating against the IAD
network. Nonetheless, at the
periphery and deep inside the
bubble, multiple long-range
early-warning radars (most of
which will be mobile or easily transportable) will share
track data over LPI data links
with other radar systems,
their long-range SAMS and associated weapons systems, as
well as their command nodes.
Therefore, in building the picture of the IAD network, the
data links that network the
radar systems together, as well
as the SAM systems, must be
an essential part of the intelligence picture, especially in anticipation of SEAD operations.

AEA
Beyond the use of a UAV to
perform the ELINT mission at
the edge of or inside the A2AD
bubble, we can also imagine
that a suitably designed UAV
and payload can be used to
provide airborne electronic attack (AEA), with some of the
same advantages as afforded
the ELINT platform. However,
this discussion is outside of
the scope of this article, and is a topic
for the future. a
About the Author: Mike Gale is the Director, EW Systems, at Ultra Electronics
TCS in Ottawa, Canada. For the past 10
years he has served in a variety of roles
in ELINT and AEA programs at Ultra.
Mike began his career as an engineer for
Plessey Radar Ltd, UK and following a
move to Canada, headed up the new EW
business at Canadian Astronautics Ltd. in
1981. He joined Telemus Electronic Systems, Inc., in 1984 and lead a number of
ELINT related R&D programs prior to serving as President and CEO of the company
for many years, before it was acquired by
Ultra. Mike has served as member of the
Defense Research Establishment Ottawa
EW R&D peer review committee and in
2015, Mike's contribution to EW was recognized by the AOC, when he was selected
to receive the 2015 Joseph W. Kearney,
EW pioneer award.

T



JED - December 2017

Table of Contents for the Digital Edition of JED - December 2017

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
Washington Report
World Report
An Approach to UAV-Based ELINT
Combined EW and Cyber Event Illuminates Important Issues and Disconnects
Technology Survey: RF Tuners and Tuner Modules for SIGINT Applications
AOC EW Singapore 2018 Preview
Report from the 2017 AOC CEMA Conference
New Products
Recounting the History of the EW Working Group
EW 101
AOC 2017 Annual Award Winners
AOC News
Index of Advertisers
JED Quick Look
JED - December 2017 - intro
JED - December 2017 - cover1
JED - December 2017 - cover2
JED - December 2017 - 3
JED - December 2017 - 4
JED - December 2017 - 5
JED - December 2017 - The View From Here
JED - December 2017 - 7
JED - December 2017 - Conferences Calendar
JED - December 2017 - 9
JED - December 2017 - Courses Calendar
JED - December 2017 - 11
JED - December 2017 - From the President
JED - December 2017 - 13
JED - December 2017 - 14
JED - December 2017 - insert1
JED - December 2017 - insert2
JED - December 2017 - The Monitor
JED - December 2017 - 16
JED - December 2017 - 17
JED - December 2017 - 18
JED - December 2017 - 19
JED - December 2017 - 20
JED - December 2017 - 21
JED - December 2017 - 22
JED - December 2017 - 23
JED - December 2017 - Washington Report
JED - December 2017 - 25
JED - December 2017 - World Report
JED - December 2017 - 27
JED - December 2017 - An Approach to UAV-Based ELINT
JED - December 2017 - 29
JED - December 2017 - 30
JED - December 2017 - 31
JED - December 2017 - 32
JED - December 2017 - 33
JED - December 2017 - 34
JED - December 2017 - 35
JED - December 2017 - 36
JED - December 2017 - 37
JED - December 2017 - 38
JED - December 2017 - 39
JED - December 2017 - 40
JED - December 2017 - Combined EW and Cyber Event Illuminates Important Issues and Disconnects
JED - December 2017 - 42
JED - December 2017 - 43
JED - December 2017 - 44
JED - December 2017 - 45
JED - December 2017 - 46
JED - December 2017 - 47
JED - December 2017 - 48
JED - December 2017 - Technology Survey: RF Tuners and Tuner Modules for SIGINT Applications
JED - December 2017 - insert3
JED - December 2017 - insert4
JED - December 2017 - 50
JED - December 2017 - 51
JED - December 2017 - 52
JED - December 2017 - 53
JED - December 2017 - 54
JED - December 2017 - 55
JED - December 2017 - 56
JED - December 2017 - 57
JED - December 2017 - 58
JED - December 2017 - 59
JED - December 2017 - 60
JED - December 2017 - 61
JED - December 2017 - 62
JED - December 2017 - AOC EW Singapore 2018 Preview
JED - December 2017 - 64
JED - December 2017 - 65
JED - December 2017 - 66
JED - December 2017 - 67
JED - December 2017 - Report from the 2017 AOC CEMA Conference
JED - December 2017 - 69
JED - December 2017 - 70
JED - December 2017 - 71
JED - December 2017 - 72
JED - December 2017 - 73
JED - December 2017 - New Products
JED - December 2017 - 75
JED - December 2017 - 76
JED - December 2017 - Recounting the History of the EW Working Group
JED - December 2017 - 78
JED - December 2017 - 79
JED - December 2017 - 80
JED - December 2017 - EW 101
JED - December 2017 - 82
JED - December 2017 - 83
JED - December 2017 - 84
JED - December 2017 - AOC 2017 Annual Award Winners
JED - December 2017 - 86
JED - December 2017 - 87
JED - December 2017 - 88
JED - December 2017 - 89
JED - December 2017 - 90
JED - December 2017 - 91
JED - December 2017 - 92
JED - December 2017 - 93
JED - December 2017 - 94
JED - December 2017 - AOC News
JED - December 2017 - 96
JED - December 2017 - Index of Advertisers
JED - December 2017 - JED Quick Look
JED - December 2017 - cover3
JED - December 2017 - cover4
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