Origin of The Term
The term "forward looking" is used to distinguish fixed forward looking thermal imaging systems from sideways tracking infrared systems, also known as "push broom" imagers, and other thermal imaging systems such as gimbal-mounted imaging systems, handheld imaging systems and the like. Pushbroom systems typically have been used on aircraft and satellites. They normally involve a one-dimensional (1D) array of pixels which uses the motion of the aircraft or satellite to move the view of the 1D array across the ground to build up a 2D image over time. Such systems cannot be used for real time imaging, and must look perpendicular to the direction of travel.
Read more about this topic: Forward Looking Infrared
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