PNG Command Guidance Implementation

To implement PNG in a command guidance setting (i. e., no seeker), a differentiating filter must be used to estimate the LOS rate. As a result, command guidance is more sus­ceptible to noise than homing guidance. This issue is ex­acerbated as the engagement takes place further from the tracking station, noise increases, and guidance degrades. Within Reference 25, the authors address command-guided SAMs by spreading the acceleration requirements over tgo. The method requires estimates for target position, veloc­ity, acceleration, and tgo but takes into account nonlinear engagement geometry.

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