PROCESS FOR SELECTION OF OBJECT AGAINST BACKGROUND OF STARS

• Main Authors: KOCHKIN V.A, KUTAEV JU.F, PROTOPOPOV V.V
• Format: Patent
• Language: English
• Published: 27.03.1998
• Edition: 6
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

FIELD: passive optical location of remote object against background of stars. SUBSTANCE: process is based on reading of image of object and stars recorded in focal plane of telescope 1 by first scanning aperture in image recording unit 2, on processing of obtained videosignal , on subsequent isolation of object, on amplitude selection of videosignal in gating unit 3 in voltage interval between two reference levels and , on binary quantization in threshold processing unit 4, on digitization of selected videosignal in summing unit 5, on logic summing of N frames of selected videosignal and on isolating of object. Additional amplitude selection of videosignal with upper reference level is carried out, summary videosignal is converted to luminous flux Φh of summary image in converter 6, spatial frequency filtration of luminous flux in direction is conducted, filtered luminous flux is read in filtration unit 7, videosignal is obtained by second scanning aperture in unit of backward conversion. Two-level quantization with threshold Vb and discretization of obtained videosignal in dialysis unit 9 are performed. Coordinates of readings of non-zero digitized videosignal are found by line and frame, minimal tauc@min, tauk@min and maximal tauc@max, tauk@max values of readings are determined by line and frame correspondingly, values tauc@min, tauc@max, tauk@min, tauk@max are analyzed, gating videosignal is formed by results of analysis, fragments of videosignal Vs in time interval corresponding to gate Vs are extracted. Minimal Vmin and maximal Vmax<