Laser Tracking System with Automatic Reacquisition Capability

Abstract

A laser based tracking system is described that has the capability of automatically performing an acquisition search to locate the target. This work is intended for precision launch phase tracking of the Saturn V launch vehicle. System tracking accuracies limited only by the atmosphere have been demonstrated, as has acquisition over a 1 degrees x 1 degrees field of view.

<title>Laser Scanning Techniques</title>

“…Equations [10], [12] and the expression for R, R = z1 + z2 (13) are three simultaneous equations in the variables z1, z2, R, d0, and D. It is convenient to regard R and D as the independent variables. Simultaneously solution of Eqs.…”

“…Simultaneously solution of Eqs. [10], [12], and [13] yields the following expressions for the dependent variables z1, z2, and d0;…”

“…However, Beiser [12] has shown that the full resolution is obtainable if transfer lens systems, are used between each pair of deflector elements to image the pupil of each deflector on the next one in line. This method would rarely be used for one dimensional deflection involving many separate units, because of the large accumulated light loss, optical distortion, and length for such a structure, but it is sometimes useful between two orthogonal deflectors [13].…”

“…This method would rarely be used for one dimensional deflection involving many separate units, because of the large accumulated light loss, optical distortion, and length for such a structure, but it is sometimes useful between two orthogonal deflectors [13].…”