employment of networking concepts. Until then, this analysis provides a preliminary basis.

The specific problem to be solved is that of hitting a moving surface target among randomly distributed false contacts (real physical objects that can be confused with the intended target). The intended target deliberately maneuvers to avoid engagement.

The committee considered three weapon system concepts:

  1. The weapon launch platform (e.g., a manned aircraft) carries a complex sensor that can acquire the target at long range and can usually distinguish target from false contact,

  2. The weapon (e.g., a future cruise missile) carries a simple seeker that can acquire the target at short range and cannot distinguish target from false contact, and

  3. The weapon (e.g., a Global Positioning System (GPS)-guided bomb with command data link) is delivered without reacquisition of the target.

Since moving targets are often numerous and individually of low value, inexpensive weapons are desirable. In the first concept, the weapon could be inexpensive, but the launch platform cost and the risk to pilots are also factors. To contain aircraft cost, the Joint Strike Fighter program office is conducting trade-off studies on how much targeting capability is needed on board versus how much can be obtained from off-board sources. The weapon for concept 3 can be less expensive than the weapon for concept 2. However, targeting system cost must increase to meet the demands of the simpler weapon. This is one of the key trade-offs to be examined.

C.1 ANALYSIS OF SYSTEM REQUIREMENTS

The mathematical model employed in this analysis is explained at the end of this appendix. The model builds on one used for a previous Naval Studies Board report1 that showed that the targeting system should provide a steady stream of reports to the weapon, as opposed to a single report. The targeting system must be able to (1) classify a target and (2) associate multiple reports with a single track. With these capabilities, a targeting system can then provide a steady stream of reports that enable a tracking filter to estimate speed and heading.

Central to the analysis are the models for target tracking and target reacquisition by the weapon or weapon launch platform. Figures C.1 and C.2 show the methodology for system requirements to kill moving targets. Figure C.1 depicts

1  

Naval Studies Board, National Research Council. 1993. Space Support to Naval Tactical Operations (U), 93-NSB-494. National Academy Press, Washington, D.C. (classified).



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