EP 0727638 B1 20010711 - Method and apparatus for fighting against helicopters operating under cover
Title (en)
Method and apparatus for fighting against helicopters operating under cover
Title (de)
Verfahren und Vorrichtung zur Bekämpfung verdeckt operierender Hubschrauber
Title (fr)
Procédé et dispositif pour combattre des hélicopters opérant à couvert
Publication
Application
Priority
DE 19505791 A 19950220
Abstract (en)
[origin: EP0727638A1] The method is carried out using an aircraft with an integral target search head. The individual radiation of the helicopter modulated by the movement of the rotor blade is used to identify the target. The aircraft containing the search head traverses a flight path parallel to the earth's surface during a search phase. The line of sight axis during the search phase is at a downwards, acute angle. While pursuing the target, the line of sight axis is colinear with the aircraft axis. The rotary and longitudinal movement of the aircraft is quantitatively detected by sensors. Using suitable algorithms, the field of view on the ground is stabilised electronically so that the frequency identification of the helicopter, which requires a still picture in the search head for a given min. time, is carried out within raster elements of a ground coordinate system.
IPC 1-7
IPC 8 full level
F41G 7/22 (2006.01)
CPC (source: EP US)
F41G 7/2226 (2013.01 - EP US); F41G 7/2253 (2013.01 - EP US); F41G 7/2293 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19505791 C1 19960814; DE 59607243 D1 20010816; EP 0727638 A1 19960821; EP 0727638 B1 20010711; US 5874727 A 19990223
DOCDB simple family (application)
DE 19505791 A 19950220; DE 59607243 T 19960216; EP 96102303 A 19960216; US 60332096 A 19960210