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Related Experiment Video

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Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

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Scanning lidar with a coupled radar safety system.

G S Kent¹, G M Hansen

¹Science and Technology Corporation, 101 Research Drive, Hampton, Virginia 23666-1340, USA. kent@arbs9.larc.nasa.gov

|March 8, 2008

Summary

A novel radar safety system ensures aircraft safety by making lidar and radar beams collinear. This system prevents potential hazards from atmospheric lidar measurements, especially when scanning away from the zenith.

Area of Science:

Atmospheric Science
Optical Remote Sensing
Aviation Safety

Background:

A scanning three-wavelength lidar system has been operational since 1992 for atmospheric measurements.
Measurements often occur away from the zenith, posing a potential hazard to air traffic.
Aircraft exhaust plume evolution and stratospheric/upper tropospheric aerosols are key research areas.

Purpose of the Study:

To develop and test a safety system for a scanning lidar.
To mitigate the risk of laser beam hazards to aircraft.
To integrate radar technology with lidar for enhanced safety.

Main Methods:

A radar safety device was integrated with the lidar system.
A dichroic mirror was used to make the laser and radar beams collinear.

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The system was tested to ensure beam collocation during scanning and radar-based laser inhibition.

Main Results:

The integrated lidar and radar system demonstrated collocated beams during scanning.
The radar system successfully inhibited the laser when an aircraft was detected.
The novel collinear beam configuration proved effective for safety.

Conclusions:

The developed radar safety system effectively enhances the safety of scanning lidar operations.
Collinear laser and radar beams provide a reliable method for hazard mitigation.
This integrated system allows for safer atmospheric measurements near air traffic routes.