JED - December 2017 - 30

sion that is part of a routine program
of maintaining the NEDB, in which the
platform is operating in a stand-off
role, can store data onboard the UAV
until the system has returned to base.
In this scenario, the UAV's datalink
system does not have to be demanding
in terms of SWAP. On the other hand,
a tactical collection mission conducted
at the beginning of a conflict in contested airspace creates a different set of
operational demands. In this situation,
there is a need to feed operational com-

The Journal of Electronic Defense | December 2017

30

887541_Crane.indd 1

manders real-time ELINT and EOB data
regarding an ever-changing threat that
will be mobile (shoot and scoot). This
would require varying degrees of data
link capacity depending on whether the
data link is streaming and or supporting
queries and resolving ambiguities on locating and identifying specific emitters
and associated weapon systems.

ELINT SYSTEM CONSIDERATIONS
Once the CONOPS and operational
ELINT missions have been identified

and the platform has been selected, the
user must now consider the ELINT system itself.
Threat Band Coverage
First, the ELINT system must be designed to cover all of the emitters of interest in the A2AD bubble. In this case,
it can be argued that the frequency
band coverage should be from A Band to
J Band, which parametrically would approximately be from below 100 MHz to
above 18 GHz. Of course, such a broad
frequency range will add to the antenna
array requirements and complexity on
the platform, among other things, and
is one of the driving requirements
POI vs. Detection
Another consideration is probability
of intercept (POI). Depending on your
point of view, POI is really more than just
time coincidence of two events. Before
detection can occur, interception must
have occurred. The probability that a
given signal is detected and processed by
the system is defined as the POI. This is
a function of the scenario, the signal and
the receiver system. Many types of staring receivers have a high POI, but they often have much less sensitivity. Detection
is a function of signal level, noise level,
detection thresholding and processing.
IFOV
Historically, due to the predominant
use of scanning technology for ELINT
(spinning reflector antenna and scanning superheterodyne receiver), POI has
been about the coincidence of dwells,
such as beam on beam, which can be
thought of as instantaneous field of
view (IFOV) vs. IFOV, beam on frequency
or frequency on frequency. To improve
POI, an ELINT system must increase its
spectral, temporal and spatial instantaneous domain coverage (fields of view),
and ultimately POI represents a tradeoff between coverage versus cost.
In order for the UAV flying an ELINT
mission in a loiter pattern to support
continuous collection, the ELINT system needs a staring capability. In other
words, the system needs a wide spatial
(angular) IFOV. On the other hand, in an
ELINT mission attempting to support the
establishment of an ever-changing EOB,
the need for DF precision is also important to the discovery and assessment of
the high-priority elements of the IAD

2017-10-01 9:52 PM


http://www.craneae.com/mw

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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