LN-100LG Launch and Reentry GPS Inertial Navigation System
The affordable, flight-proven LN-100LG navigates critical launch and reentry vehicles reliably and accurately.Ready to Launch
The LN-100LG system provides an affordable, reliable, accurate and flight proven guidance unit for critical launch and reentry vehicles that is available today. Adapted from the high-production LN-100G GPS-updated inertial navigation system, the LN-100LG employs common hardware and software modules to offer shorter delivery lead times, faster service, and ensured supportability. To address the more severe and dynamic environments of launch and reentry, the LN-100LG has been mechanically ruggedized and its operating range has been enhanced. The embedded GPS receiver has been modified to operate in most launch and ballistic coast trajectories.
Performs in Severe Environments
The mechanical robustness of the LN-100LG has been proven in qualification tests and in many flight applications, including:
• Low earth orbit
• Geosynchronous orbit
• Target vehicles
• Midcourse and reentry navigation
Proven Accuracy
The LN-100LG can be initialized on the ground by gyrocompassing or by using GPS updates optimized by a multi-error-state Kalman filter while in flight. Its orbital insertion accuracy has been demonstrated on its many launches.
Launch and Reentry Vehicle Experience
The LN-100LG variants have successfully performed in over 35 flights for programs including:
• Pegasus
• Hyper-X
• Taurus
• Minotaur
• Payload Launch Vehicle
• Athena
• Multi-Service Launch System
Advantages
• Flight proven on critical launch and reentry programs
• Derived from the production LN-100 family of systems
• Optional embedded GPS receiver
• Optional separate processor for userprogrammed vehicle flight control and mission functions
Functional Capability
The LN-100LG performs inertial navigation and guidance and offers GPS update capability. The system outputs position, velocity, attitude, attitude rates, body-axis linear acceleration and angular rate and acceleration data.
Data messages are transmitted via dual MILSTD- 1553B buses and via three RS-485/422 data buses with UART protocol. The MIL-STD- 1553B buses function as either a remote terminal or bus controller.