• IGAS_1-690x364

Integrated GPS Anti-Jam System (IGAS)

Accuracy is paramount when launching weapons in the field. Your mission success and the safety of your troops depend on it. Rockwell Collins has proven expertise in delivering reliable, accurate navigation products for precision-guided missile and munitions systems. The Integrated GPS Anti-Jam System (IGAS) is no exception.

The IGAS is the first integrated GPS and Anti-Jam system in the proven family of Rockwell Collins munitions receivers. The receiver utilizes 24-channel dual frequency all-in-view navigation, offering high performance GPS for tightly coupled GPS/INS (Global Positioning System/Inertial Navigation System) integrations. It is derived from the field-proven 12-channel NavStrike™ and Joint Direct Attack Munitions (JDAM) receivers. IGAS is a low-cost, small-size, high-accuracy and highly reliable system that has been specifically designed to meet the mission needs of missile and munitions applications.


GS Customer Support
Phone 1: 800-321-2223 (U.S. only)
Phone 2: +1 319-295-5100



Features & Benefits

  • 24-channel SAASM-based design
  • >85 dB J/S performance
  • High-rate aiding
  • SA/AS capable
  • Fast Direct-Y capability
  • All-in-view track and navigation
  • High accuracy
  • Antenna masking selection
  • Precise time transfer (timing pulse not needed)
  • Continuous ionospheric corrections
  • Fifth-generation SAASM-based design
  • Dual-frequency (L1/L2) tracking
  • Enhanced Direct-Y code acquisition/cold start
  • High anti-jamming immunity
  • 24-channel all-in-view tracking and navigation
  • Field-programmable software
  • Designed for high-g vibration
  • High-speed serial interface
  • SAASM extended functions including black-key
  • Clock recalibration




L1 frequency, C/A and P or Y code**
L2 frequency, P or Y code**


Velocity: >1,200 m/sec maximum
Acceleration: 10 g


<10 sec direct-Y - time uncert: ~10 µs
<26 sec direct-Y - time uncert: ~10 ms
77 s nominal cold start w/o initialization data

Time Accuracy  

<100 nanoseconds RMS 

Position Accuracy 

<3 meters CEP**
<2 m CEP typical

Velocity Accuracy  

<0.07 m/sec RMS (typical)


>100,000 ft** 

Position Update Rate 

Unaided - 1 Hz pseudo- range based and 10 Hz propagated;
INS-aided - 1 Hz pseudo- range based and 4-25 Hz dependent on aiding rate

Crypto Key Input 

Serial port, KYK-13/KOI-18/ CYZ-10** 


>6,500 hours 


- Serial data: RS-422, up to 230 Kbaud
- 1 PPS/TimeMark/HaveQuick
- Four L1/L2 RF antenna ports, keyed
- Keying (DS-101/DS-102/high-speed serial port)
- CRPA power/control

Physical Specs


2 pounds maximum 


4.35" W x 5.15" H x 0.9" D maximum


<12 watts continuous


Temperature Range 

-54°C to +74°C (continuous)
-54°C to +90°C (non-operating)


150 g operating 

Typical System

Main Components

Please contact Rockwell Collins for additional information on this product.

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GS Customer Support
Phone 1: 800-321-2223 (U.S. only)
Phone 2: +1 319-295-5100