Tactical and Atmospheric Coherent Laser Radar Technology

Abstract

Infrared laser radars constitute a direct extension of conventional radar techniques to very short wavelengths. Whether they are called Lidar (Light detection and ranging) or Ladar (Laser detection and ranging), they operate on the same basic principles as microwave radars. Because they operate at much shorter wavelengths, Lidars are capable of higher accuracy and more precise resolution than microwave radars. On the other hand, Lidars are subject to the vagaries of the atmosphere and are thus generally restricted to shorter ranges than microwave radar. Rather than supplanting microwave radar, Lidar opens up new applications that exploit the great shift in wavelength. Lidar applications include:

• Tactical imaging systems

• Missile guidance

• Aircraft guidance

• Clear air turbulence and severe storms sensors

• Fire control and line-of-sight command systems

• Remote sensing of atmospheric constituents

• Satellite tracking