Passive detection of source of known spectral emission

Details Passive detection of source of known spectral emission Passive detection of source of known spectral emission

1995-07-25

1997-04-29

Gonzalez, Frank

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

2502521, 364423098, G01J 328

Patent

active

056254520

ABSTRACT:
A system and method of passive detection of a luminous target employs a prior knowledge and a present measurement of its electromagnetic spectrum during a target acquisition procedure and, subsequently, during analysis of the spectrum to determine the presence of Doppler shift and broadening of lines of the spectrum. The prior known reference spectrum is adjusted for the Doppler shift so as to enable identification of the corresponding spectral lines of the received target spectrum. A history of the spectral data enables an identification of the type of target, as in the case of a rocket, and a determination of characteristics of a flight of the rocket.

REFERENCES:
patent: 4694172 (1987-09-01), Powell
patent: 5329595 (1994-07-01), Davies
Helicopter Plume Detection By Using an Ultranarrow-Bond Noncoherent Laser Doppler Velocimeter by: S. H. Bloom et al., Optics Letters, vol. 18, No. 3, Feb. 1, 1993 at pp. 244-246.

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