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MERADCOM was tasked by USATHAMA to administer and monitor a contract with Geophysical Survey Systems, Inc. on the utility of a ground-penetrating radar for the detection of buried unexploded ordnance (UXO). This report documents that evaluation. Disposition of military installations known or suspected to be contaminated with UXO has become a matter of increasing concern to the Department of the Army. Reutilization of DA lands previously utilized as impact areas, demolition ranges, and munition burial sites is significantly restricted. In particular, any such lands declared excess to Army needs are precluded from being turned over to productive civil disposition until determined to be free of hazardous UXO contamination. In order to define the scope of work required for cleanup and to plan and support actual UXO recovery and disposal operations, an effective UXO detection and location system must be developed to define the extent of any such UXO contamination; i.e., type munitions, quantity, conditions, depth of burial, etc. Final certification of such land as free of UXO contamination could potentially be based on the findings of surveys done with such systems. The GSSI radar was evaluated and in its present form was found to be unsuitable for the task for two reasons: (1) it detected only a small portion of the buried targets and (2) there were many more false detections than true detections. (Author)

Explicit differential equations in closed form have been found for pole piece geometries which are generalizations of those used in the QMF. For arbitrarily shaped pole pieces, the solution of Laplace's equation cannot be written in closed form and, thus in general the ion differential equations of motion cannot be written in closed form. The geometries shown in figures 4, 5 and 6 are analytically useful in determining if other geometries might yield mass filters with improved resolution/transmission characteristics. Computer simulation of ion motion in these geometries is a subject for future research. The principal new results of our research are: 1) new derivations of the equations which describe ion motion in a QMF, 2) the equations of pole pieces for hexapole, octupole and decapole geometries illustrated in figures 4, 5 and 6, 3) closed form differential equations of ion motion in these geometries (equations (17), (20) and (21) and 4) the realization that the inverted pendulum is a mechanical analog of the QMF., Paper from the Proceedings of the Army Sciences Conference (1982), 15-18 Jun 1982.

The shape of a surface influences reflectance properties; therefore, shape is one factor among many which determines how difficult it is to 'see' a surface-laid mine from the air. The shape of the surface can be locally characterized using the radius of curvature concept. A survey of the literature showed no systematic radius of curvature treatment which displayed explicit formulae for calculating radius of curvature in three dimensions and which emphasized applications of this concept. In this report a new and physically motivated definition for radius of curvature is given and from this definition the well-known and some hitherto unknown radius of curvature formulae are derived. The problem of computing radius of curvature in three dimensions for curves known at discrete points is solved and applied to the problem of measuring one parameter characterizing enemy aircraft maneuverability from radar data. Other applications include: the design of a device for measuring road or railroad track radius of curvature, the design of a device for checking highspeed roads for proper banking and a technique for the use of curvature concepts in the design of a land navigational system. (Author)