PNU / UPNU
High-precision pointing and position location for HIMARS, MLRS, and next-generation fire control systems — GPS-aided, jam-resistant, and combat-proven across more than 1,500 fielded units.
One self-contained unit
A single sealed housing pairs high-performance RLG-34 ring laser gyros with a SAASM-capable GPS receiver and odometer aiding, delivering precision pointing and position location without external electronics boxes to integrate. Embedded built-in test and no periodic calibration requirement keep it combat-ready with minimal support burden.
Built for combat-proven precision
Equipped with more than 30 years of direct experience aiming and navigating MLRS and HIMARS launchers, the PNU / UPNU family delivers a true state-of-the-art system approach — combat-proven and engineered for reliable, low-maintenance service in the field.
RLG-34 Ring Laser Gyros
High-performance inertial sensing for precision pointing and position location without external aiding.
SPS GPS Receiver
Standard Positioning Service GPS with an embedded 12-channel Selective Availability Anti-Spoofing Module (SAASM).
Jam-Resistant
Impervious to jamming in inertial mode, maintaining pointing accuracy when GPS is degraded or denied.
Combat-Proven
More than 1,500 PNUs / UPNUs fielded and forward deployed across MLRS and HIMARS programs.
Embedded Built-In Test
Continuous BIT simplifies fault isolation, reduces mean time to repair, and keeps units mission-ready.
No Periodic Calibration
Eliminates recurring calibration downtime for lower total cost of ownership over the unit's service life.
High Reliability
High MTBF and low mean time to repair (MTTR), backed by three decades of fielded system experience.
Common Architecture
Shares architecture and components with the Paladin, PIM, Firefinder, and IPADS system family.
Growth Capability
Designed for ready adaptation and optimization to current and future weapon systems or sensors requiring precision pointing and positioning.
Where PNU / UPNU is deployed
Fielded on the Army's premier rocket artillery systems, with growth capability to future fire control platforms.
High-Mobility Artillery Rocket System
- M142 HIMARS
- Precision-guided rockets
- Rapid emplacement & displacement
- IFCS / UFCS fire control
Multiple Launch Rocket System
- M270-series launchers
- Rocket & missile fire control
- Legacy IFCS retrofit
- Combat-proven
Shared platform family
The PNU / UPNU family shares architecture and components across a broader set of Army fire control and positioning systems, assuring growth capability to meet future needs.
M109 Paladin / PIM
- M109A6 / A7 Paladin
- Paladin Integrated Management (PIM)
Firefinder-Class Radar
- AN/TPQ-53-class systems
- Shared architecture & components
Rocket Artillery
- M142 HIMARS
- M270A1 / M270A2 MLRS
Self-Propelled Artillery
- M109A6 / A7 Paladin
- Paladin Integrated Management (PIM)
Target Acquisition
- Firefinder-class radar systems
Positioning & Azimuth
- IPADS-class systems
Fire Control Growth
- Future / emerging weapon systems
- Sensors requiring precision pointing
Sustainment
- Embedded BIT diagnostics
- No periodic calibration
- Low MTTR field service
Talk to a navigation
systems engineer
From datasheet questions to evaluation units, our team can help scope PNU / UPNU for your platform.