Abstract: An in-vehicle compass system and method that is calibrated based on a magnetic field model and/or a deviation analysis based on a location signal received from a positioning system.

Abstract: A drop target includes a first target seen by a shooter and a second target concealed behind the first target. When the shooter hits the second target, the first target moves, thereby representing that the shooter as hit a desired “kill zone” and should cease shooting.

Abstract: A reusable ballistic door for use in the training of individuals such as police officers and military personnel. The door may be formed to have different weak spots, requiring different techniques to enter the door. The door may be quickly and inexpensively rebuilt for subsequent training. A reusable training door may also be used inside of a shoot house to provide realistic training scenarios.

Abstract: An imaging system includes an exciter generating a series of radio frequency pulses for dividing a frequency band having a sampled band defined by an upper folding frequency and a lower folding frequency. The system also includes a receiver receiving and digitizing the radio frequency pulse after the radio frequency pulse has been reflected. The receiver also samples the frequency band, receives a folded radio frequency pulse appearing within the sampled band, and generates therefrom a receiver signal.

Abstract: A spectral characterization method accurately characterizes an applied signal spectrum that has multiple, spectrally-separated signal peaks. The method detects signal peaks within the spectrum and measures the spectral content of that spectrum using a first measurement bandwidth that is sufficiently wide to encompass each of the signal peaks and accurately measure a signal component of the spectrum. Spectral content of the spectrum measured using a narrow measurement bandwidth that accurately characterizes a noise component of the spectrum. Signal-to-noise ratio for the signal peaks can be calculated based on the measurements performed using the first and second measurement bandwidths. The spectral characterization method is implemented using a spectral measurement instrument having an adjustable measurement bandwidth.