AMERICA’S ARMY WINNING IN A COMPLEX WORLD

ACAT II
NAVSTAR Global Positioning System (GPS)
PEO Intelligence, Electronic Warfare and Sensors | Aberdeen Proving Ground, MD
WARFIGHTING
FUNCTION
Mission Command
Movement and Maneuver
Intelligence
Fires
Sustainment
Maneuver Support
and Protection
Engagement
ACQUISITION
LIFECYCLE PHASE
Materiel Solution Analysis
Technology Maturation &
Risk Reduction
Engineering & Manufacturing
Development
Production & Deployment
Operations & Support
MILESTONE DECISION
AUTHORITY
Defense Acquisition Executive
Army Acquisition Executive
Program Executive Officer
DESCRIPTION
The NAVSTAR Global Positioning System (GPS) is a space-based,
Joint-service program led by the Air Force that distributes Positioning,
Navigation and Timing (PNT) data to tactical and strategic organizations.
The GPS has three segments: A space segment (nominally 24 satellites),
a ground control segment, and a user equipment segment consisting
of receivers configured for hand-held, ground, aircraft and watercraft
applications.
Military GPS receivers utilize the Selective Availability Anti-Spoofing
Module (SAASM) to access the Precise Positioning Service signal for
enhanced accuracy and signal protection not available to commercial
equipment. The two highest density GPS receivers in the Army today
are the Defense Advanced GPS Receiver (DAGR) and the Ground-
Based GPS Receiver Applications Module (GB-GRAM). Approximately
331,000 DAGR were fielded through 2012 for dismounted use and
platform installations. More than 125,000 GB-GRAM have been
procured to date through a still-active Army contract to equip a wide
array of weapon systems. In addition, the DAGR Distributed Device
(D3) will provide a distributed PNT capability to selected platforms
in FY16.
BENEFIT TO THE WARFIGHTER
When operated in keyed mode, SAASM-based GPS receivers provide
warfighters with enhanced positional accuracy and signal protection.
SPECIFICATIONS
DAGR:
• Size: 6.37 x 3.4 x 1.56 inches
• Weight: 1 pound; fits in a two-clip carrying case that attaches to
load-bearing equipment
• Frequency: Dual (L1/L2)
• Battery Life: 19 hours (4 AA batteries)
• Satellites: All-in-view
GB-GRAM:
• Size: 0.6 x 2.45 x 3.4 inches
• Weight: 3.5 ounces
• Frequency: Dual (L1/L2)
• Satellites: All-in-view
D3:
• Size: 6.37x 3.74 x 1.64 inches
• Weight: 1 pound
• Frequency: Dual (L1/L2)
• Satellites: All-in-view
PROGRAM STATUS
• Through FY17: DAGR hardware retrofit process continues
• 4QFY14:
››
DAGR sustainment management transitioned to U.S. Army
Communications-Electronics Command Logistics and
Readiness Center
››
New operating software issued for field reprogramming
• FY15: D3/Stryker was designated as Army-led platform for Military
GPS User Equipment (MGUE) integration
PROJECTED ACTIVITIES
• 2QFY16-4QFY17:
››
Field D3 to Armored Knight vehicles
››
D3/Stryker support for evaluation of MGUE prototypes
through FY19
››
Resiliency Software Assurance modification for DAGR with
Modification Working Order field reprogramming in FY18
››
Completion of DAGR 3.2 retrofit and retirement of DAGR 3.1 to
standardize DAGR configuration in field Army
››
Award production contract for embeddable Military-code (M-code)
››
Mitigate gap between GB-GRAM (SAASM) production contract
and initial availability of successor M-code product
››
Program Management Office and System Engineering support for
modernization of DAGR, GB-GRAM and D3
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UNITED STATES ARMY