A holding unit for articles to be carried on an all terrain vehicle, or the like, comprising a mounting base adapted to be secured to various surfaces and components of the vehicle and extending downwardly from a support arm adjustably positioned and securely fixed and at least one article holder having stacked cradles to receive articles to be held in a stacked arrangement. This circuit includes a reverse gamma controller, a contour compensation signal generator, and a calculator. An error-detection circuit coupled to the encoder circuit generates and stores error-detection information associated with the set of M symbols, facilitating subsequent probabilistic determination of a type of error during communication of the set of M symbols to another circuit. Finally, the system includes a processing component for determining thermal characteristics about the analysis area.