AIAA-2004-6840-258 - AIAA 2004-6840 USAF Developmental Test...

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American Institute of Aeronautics and Astronautics 1 Threat Radar System ECM System Target Simulator Test Equipment Test Equipment System Trigger (PRF) Target and ECM Boresight Tower ? Figure 1. Diagram of Ground-mount Test Reading the Tea Leaves: Extracting Meaningful, Quantifiable Measures of Effectiveness from Electronic Warfare Jammer Data Michael H. Lutz * and Nathanael E. Mosley Sverdrup Technology, Inc. 308 West D. Avenue, Suite 1, P.O. Box 1935, Eglin AFB, FL 32542 I. Abstract With typical radar jammer testing, there is no shortage of data to evaluate. On the contrary, threat radar mode and tracking error data is available in large quantities. Frequently, missile and gun fly-out models are available to convert tracking error information into projectile miss distances. The ‘trick’ to evaluating the results of these tests is quickly identifying, locating, and organizing the nuggets of relevant information buried in the mass of available data and correlating them into meaningful Measures of Effectiveness (MOE). This paper presents a case study of the ‘near real-time’ development of an automated data analysis and scoring system for a recent ground mount test. The process includes custom data extraction to gain access to threat tracking errors, integration of an existing missile fly-out model to calculate miss distances, and a novel approach to a combined numerical and graphic presentation of the resulting MOEs. II. Introduction EVELOPMENTAL testing of electronic warfare (EW) systems does not simply consist of flying an aircraft against a threat and noting the results. Robust tests are designed to study the characteristics of the EW systems in numerous environments. However, the overwhelming cost of flight tests restricts the number of viable test points that can be collected. Flight tests are also very rigid in their adherence to test plans. Ground-mount testing is a cost- effective alternative. Furthermore, this alternative allows the EW test engineer the flexibility to change test parameters as the results of the test become clear. If accurate test data can be analyzed within minutes of the completion of a test point, this flexibility is greatly enhanced. This capability is what the Range Data Decoder tool provides. III. Ground-mount Tests and MOEs The first thing this paper should explain is the nature of ground-mount testing (Figure 1). Essentially, the electronic countermeasure (ECM) system is removed from the aircraft and plugged into an antenna on a tower. The threat radar is set up such that it does not radiate but only receives. The ECM suite and threat radar are connected by a fiber optic cable. A trigger pulse travels from the threat to the ECM system via the cable. The tower antenna then radiates a
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AIAA-2004-6840-258 - AIAA 2004-6840 USAF Developmental Test...

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