Abstract: In order to determine crosswind effects between a weapon and its intended target (204) a crosswind gradient measuring apparatus (600) directs a first pulsed coherent light beam (646) and a second pulsed coherent light beam (648) to the target (204). Light of both beams scattered back by aerosols in the air is measured by using a detector (652) thus generating a beat frequency in the detector signal. The beat frequency indicates a Doppler-shift due to crosswind as a function of range between weapon and target wherein the range is determined by the time of flight. The information determined by such a Doppler differential interferometer, DDI, is utilized by a signal processor (608) to calculate the bullet's crosswind offset which enables manual of automatic adjustment of an aiming mechanism.

Abstract: In order to determine crosswind effects between a weapon and its intended target (204) a crosswind gradient measuring apparatus (600) directs a first pulsed coherent light beam (646) and a second pulsed coherent light beam (648) to the target (204). Light of both beams scattered back by aerosols in the air is measured by using a detector (652) thus generating a beat frequency in the detector signal. The beat frequency indicates a Doppler-shift due to crosswind as a function of range between weapon and target wherein the range is determined by the time of flight. The information determined by such a Doppler differential interferometer, DDI, is utilised by a signal processor (608) to calculate the bullet's crosswind offset which enables manual of automatic adjustment of an aiming mechanism.

Abstract: In general, the present disclosure relates to persistent surveillance (PS), wide medium and small in area, and large volume data streaming (LVSD), e.g., from orbiting aircraft or spacecraft, and PS/LVSD specific data compression. In certain aspects, the PS specific data or LVSD compression and image alignment may utilize registration of images via accurate knowledge of camera position, pointing, calibration, and a 3D model of the surveillance area. Photogrammetric systems and methods to compress PS specific data or LVSD while minimizing loss are provided. In certain embodiments, to achieve data compression while minimizing loss, a depth model is generated, and imagery is registered to the depth model.