JED - June 2014 - 24

The Journal of Electronic Defense | June 2014

24

AN/ALA-3 pulse analyzer and the
AN/APA-74 signals analyzer.
For its part, the September 1964
USAF was involved in SIGINT collection
at both the strategic and tactical levels, with Boeing's RB-47H handling the
former. First fielded during 1955, the
RB-47H was the aircraft that marked
the transition between manual and
automated collection by virtue of its
AN/ALD-4 automatic signals intercept,
analysis and recording system. Entering
service during 1957, AN/APD-4 was able
to cover the 1- to 4-GHz band in three
sub-bands and recorded parametric and
other data on film. As might be expected with such a first generation system,
the AN/APD-4 had its faults, and from
1961 onwards was supplemented by
the AN/ALD-4 Silver King equipment.
Installed as an upgrade, the AN/ALD-4
was mounted in a 7.62-meter long pod
that was attached to the side of the
RB-47H's fuselage just aft of its starboard wing root. As such, the 100-MHz
to 16-GHz band AN/ALD-4 included a
"channelizer" (made up of approximately 200 crystal-video receivers) and
three scanning receivers, together with
a limited amount of hardwired functional logic, and processed received
data into information blocks that were
recorded on magnetic tape for post-mission analysis. Flown by then Strategic
Air Command's 55th Strategic Reconnais-

677599_ARSProducts.indd 1

sance Wing (still going strong today),
the RB-47H flew from bases in Europe
and the Far East, as well as ones located
in the continental US, and continued in
service until the late 1960s when it was
finally replaced by the first generation
of the current RC-135 platform.
At the tactical level, 1964 saw three
USAF Tactical Reconnaissance Squadrons equipped with the Douglas EB-66C
(RB-66C) whose four "Ravens" operated
a mission suite that in baseline form
included AN/APR-9, AN/APR-14 and
AN/ARR-8 receivers, the AN/ALA-5
pulse analyzer, the AN/ALA-6 directionfinder, the AN/APD-4 signals collection

1/28/14 4:17 PM

system and the AN/APA-74 signals analyzer. Although virtually at the end of
its operational life, the EB-66C went on
to play a significant part in the USAF's
campaign in North Vietnam during the
mid- to late-1960s.
Elsewhere in the inventory, the mid1960s USAF also managed the Airborne
Communication Reconnaissance Program (ACRP) that by 1964 was centered
on the Lockheed C-130A-II and B-II Sun
Valley I/II (also known as Rivet Victor
I/II) COMINT platforms. Created under
the "Big Safari" construct (which aims
to create required capabilities at the best
cost and in the minimum time), work on
the C-130A-II began during 1957, with
the type emerging as a 10-operator, 0.1MHz to 1.75-GHz band COMINT platform.
Onboard equipment included "Greenville" receivers [named after the Temco
(later E-Systems and now L-3 Integrated
Systems Group) plant at Greenville, TX],
narrow and wideband recorders, a VHF/
UHF direction-finding sub-system, a
100- to 150-MHz band panoramic receiver and the AN/APN-99 navigation system. First delivered to the German-based
7406th Support Squadron during the late
1950s, the C-130A-II went on to be cycled
through Greenville for depot maintenance/upgrading four times by the time
it was withdrawn from service in 1972.
Work on the Sun Valley II aircraft began at Greenville during May 1960, with
the 11th airframe in the program being
inducted during the following November. Similarly tasked to the C-130A-II,


http://www.arsproducts.com

JED - June 2014

Table of Contents for the Digital Edition of JED - June 2014

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
World Report
50 Years of Airborne SIGINT
ACE Program Lays Out Plans for New EW Capabilities
Technology Survey: Spectrum Analyzers
EW 101
NAWCWD Hosts 43rd Annual Collaborative Electronic Warfare Symposium
AOC News
Index of Advertisers
JED Quick Look
JED - June 2014 - cover1
JED - June 2014 - cover2
JED - June 2014 - 3
JED - June 2014 - 4
JED - June 2014 - 5
JED - June 2014 - The View From Here
JED - June 2014 - 7
JED - June 2014 - Conferences Calendar
JED - June 2014 - 9
JED - June 2014 - Courses Calendar
JED - June 2014 - 11
JED - June 2014 - From the President
JED - June 2014 - 13
JED - June 2014 - 14
JED - June 2014 - The Monitor
JED - June 2014 - 16
JED - June 2014 - 17
JED - June 2014 - 18
JED - June 2014 - 19
JED - June 2014 - World Report
JED - June 2014 - 21
JED - June 2014 - 50 Years of Airborne SIGINT
JED - June 2014 - 23
JED - June 2014 - 24
JED - June 2014 - 25
JED - June 2014 - 26
JED - June 2014 - 27
JED - June 2014 - 28
JED - June 2014 - 29
JED - June 2014 - 30
JED - June 2014 - 31
JED - June 2014 - 32
JED - June 2014 - ACE Program Lays Out Plans for New EW Capabilities
JED - June 2014 - 34
JED - June 2014 - 35
JED - June 2014 - 36
JED - June 2014 - Technology Survey: Spectrum Analyzers
JED - June 2014 - 38
JED - June 2014 - 39
JED - June 2014 - 40
JED - June 2014 - 41
JED - June 2014 - 42
JED - June 2014 - 43
JED - June 2014 - 44
JED - June 2014 - 45
JED - June 2014 - 46
JED - June 2014 - 47
JED - June 2014 - 48
JED - June 2014 - EW 101
JED - June 2014 - 50
JED - June 2014 - 51
JED - June 2014 - 52
JED - June 2014 - NAWCWD Hosts 43rd Annual Collaborative Electronic Warfare Symposium
JED - June 2014 - AOC News
JED - June 2014 - 55
JED - June 2014 - 56
JED - June 2014 - Index of Advertisers
JED - June 2014 - JED Quick Look
JED - June 2014 - cover3
JED - June 2014 - cover4
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