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

FOREIGN MILITARY SALES

Pulse-per-second-capable GPS receivers have been sold to 41 authorized countries

CONTRACTORS

DAGR/GB-GRAM acquisition and support:
  • Rockwell Collins (Cedar Rapids, IA)
  • D3 acquisition: GPS Source, Inc. (Pueblo, CO)

PEO

PEO-IEWS