Patent RU-2627550-C1 (RU)
Inventor: MENSHIKH OLEG FEDOROVICH
IPC: G01S17/02
Filed: 2016-06-14
Granted: 2017-08-08
Abstract: FIELD: measuring equipment. 
     SUBSTANCE: three-dimensional coherent doppler radar comprises a supermode gas continuous wave laser that is attached to the detected object, and to the heterodyne-type photodetector by means of the light-dividing element and of the send-receive lens. It also has a multiple-duct information handling unit, that is linked to the heterodyne-type photodetector outlet, a scan unit in azimuth of a probe radiation, that is formed by the send-receive lens in the fan-like shape emission, where the lens is wide-angled in elevation and narrow-angle in azimuth, and a topographic survey unit that is linked to the last mentioned one. With regard to the above mentioned, the heterodyne-type photodetector is matrix-shaped made from the set of the photosensitive members, the channel wide-band amplifiers, the multilink matched compression filters on the basis of the dispersive delay lines, the channel compensating amplifiers, the channel amplitude demodulators that are linked to the base clippers. The photosensitive members' outlets are attached to the relevant inlets of the multiple-duct information handling unit, which is composed of the placed in series channel frequency rectifiers of the actuating signals with the signal of the linear-frequency modulated heterodyne oscillator. The radar also comprises a multiple-duct unit of the angular coordinates determination on the detected object, that is parallel-connected to the outlets of the multiple-duct information handling unit, and glaring elements of the sea surface and a multichannel measurement unit of the Doppler frequency shifts of the probe radiation rereflections received by the detected object for itself and for the relevant glaring elements of the sea surface. The outlets of the multiple-duct units of the angular coordinates determination and of the multichannel measurement unit of the Doppler frequency shifts for the relevant received emissions are respectively attached to the first and the second inlets of the detected object signature evaluator - its flying height, slant distance and speed vector, the third inlet of which is linked to the topographic survey unit. The outlets of the detected object signature evaluator are linked to the statistical average of the test features at a current time. The reflected radiations detection is achieved just as directly from the detected object so from the sea lights that are formed by the probe radiation dispersion by the detected object surface at different dispersion angles. The monofrequent continuous wave gas laser is complementarily added into radar construction under the collinearity of the optical axes of both transmitting and receiving lenses. This laser is fitted with a piezocorrector of the adjustment of its beam resonator. The piezocorrector forms a transmitting stereo channel based on the additional transmitting lens with the stereo base h. The outlets of both lasers are complementarily linked through the low-reflection mirrors with high transmission to the optical mixer, the outlet of which is attached to the in series affiliated circuit made of the synchronous rectifier (slope detector), the integrating device and the direct-current control amplifier, the outlet of which is attached to the piezocorrector of the additional laser. Upon that, the outlet of the reference quartz-crystal oscillator of the difference adjustment frequency of the primary and additional continuous wave lasers is attached to the second inlet of the synchronous rectifier. Moreover, the same outlet of the reference quartz-crystal oscillator is attached to the third inlet of the detected object signature evaluator - the low altitude naval missile. 
     EFFECT: detected object correct coordinate measuring probability rise. 
     7 dwg