Overcome Weaknesses In Your Positioning Systems with GPS and Inertial Testing

How do you test your GPS/Inertial Navigation system?

GPS has a number of inherent weaknesses in terms of availability and integrity of information to provide a position solution that can be relied upon. The use of inertial sensors to provide an augmentation to GPS is a common approach in overcoming these weaknesses and to improve performance for demanding applications.

An Inertial Navigation System (INS) provides position, velocity, orientation and angular velocity by measuring the linear and angular accelerations applied to the system. Spirent offers a number of systems designed to simulate the inertial sensor outputs coherently with simulated GPS RF, thus enabling the inertial receiver elements to be tested. In addition, Spirent has a turntable option available for stimulation of embedded inertial sensors, again coherent with simultaneous GPS simulation.

What are the key validation and deployment issues of GPS/INS systems?

Integrated GPS/INS (IGI) systems are essential for high dynamic platforms and provide continuous navigation during RF interference or weak/degraded satellite signal conditions. While GPS/INS system testing may be conducted on the host platform (such as an aircraft), this approach is prohibitively expensive for extended tests and does not allow for repeatability under controlled conditions. A more cost-effective approach is to test the GPS/INS system in the lab. This can be achieved by generating coherent GPS satellite signals and inertial delta-V/delta-theta terms for a specific trajectory and providing these inputs to the system under test.

Spirent Solves Your Critical Test Challenges.

Spirent supports a variety of GPS/INS interfaces:
  • Northrop Grumman (Litton) LN-100, LN-200, LN-251, LN-260
  • Honeywell (H-764G, SIGI, HG-1700, HG-1900, NAV100™)
  • NATO STANAG 4572
  • Barometric altimeter aiding is supported
  • CDU option is available
Why Test with Spirent?
  • GPS L1, L2 and L5 frequencies. All current and planned GPS signals supported today, including C/A, P(Y), M code, L2C and L5 I and Q.
  • Classified testing for authorized users: SA/A-S, SAASM compatibility, AES M-code and SDS M-code.
  • Very high dynamic motion models, high update rate for test scenarios, zero effective latency using Spirent's predictive sampling
  • Multiple RF output configurations for adaptive antenna and platform attitude testing
  • GPS/Inertial (GPS/INS) navigation system testing with hardware-in-the-loop capabilities
  • Interference and augmentation system testing supported

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