The electro-optical systems atmospheric effects library (EOSAEL) target acquisition (TARGAC) program was designed to be a self-contained module that would enable the user to predict the atmospheric effects on the ability of EO sensors to detect and/or recognize a target. The module calculates ranges as a function of the probability of detection and recognition for a variety of sensors, including direct-view optics (DVO) devices, image intensifier (II) devices, silicon televisions (SiTV), and thermal imagers (TI). Additionally, provisions have been made for the user to examine the atmospheric e_ects on the performance of a custom device, provided the user can specify the device response. The model has been adopted from the target acquisition model developed over the last few years at the U.S. Army Research Laboratory-Battlefield Environment Directorate (formerly Atmospheric Sciences Laboratory-ASL) (Seagraves, 1989). The TARGAC manual is divided into four major parts. The first part consists of technical documentation and brie y describes the theory invoked in constructing the TARGAC module. The discussion provided and references listed are intended to give the user the background necessary to use the model intelligently. The second part is a discussion of the limitations of the model and the validation of the model conducted thus far. The third part of this report is the operations guide the describes the internal parts of the model, inputs, and structure of the model. The fourth part of this report is a set of examples of the use of the model TARGAC. Readers already familiar with the theory generally invoked in target acquisition modeling may wish to skip to the user's guide directly.

PcEosael Overview
Alphabetical List of EOSAEL Modules
Functional List of EOSAEL Modules

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