Space-based infrared early warning spectrum section selection method and device based on detection efficiency

Abstract

The embodiment of the invention provides a space-based infrared early warning spectrum section selection method and device based on detection efficiency, and belongs to the technical field of remote sensing detection. The method comprises the following steps: determining spectral radiance Itw of tail flame gas of a to-be-detected target; determining the spectral radiance Ib of background infrared radiation and the spectral atmospheric transmittance tau t from the target top of the to-be-detected target to a detector; determining the radiance It of the tail flame gas at an entrance pupil; determining a temperature difference [delta] T between the tail flame gas and the background at the entrance pupil within each of a plurality of detection spectrum sections; determining the minimum resolvable temperature difference MRTD of the space-based infrared detector by adopting an optical remote sensing detection efficiency evaluation method; determining the detection probability of the tail flame gas in each detection spectrum section; and setting an optimized detection spectrum section according to the detection probability obtained for each detection spectrum section. According to the embodiment of the invention, the space-based infrared early warning spectrum section is optimally selected by taking the detection efficiency as an evaluation index, and the evaluation result is more visual and reliable.

Description

technical field [0001] The invention relates to the technical field of remote sensing detection, in particular to a method and device for selecting a space-based infrared early warning spectrum segment based on detection efficiency. Background technique [0002] Space-based infrared early warning satellites are currently the most effective means of detecting ballistic missile launches. They judge the launch of ballistic missiles by detecting the infrared radiation of missile tail flames, especially the high-intensity radiation in the active section, and give early warning and position missiles. The information is transmitted to the ground station to provide sufficient time for the judgment, preparation and interception of the ground defense system, which is of great significance to defending homeland security. [0003] The missile target and the background radiation in the infrared band have certain spectral characteristics, and the atmospheric radiation transmission also ha...

AI Technical Summary

Problems solved by technology

Through the contrast model, the contrast of different spectral bands can be obtained, and then the detection spectral band can be optimized, but the detector response and background clutter are not considered enough.

The signal-to-noise ratio model is a comprehensive model that comprehensively considers the influencing factors of the imaging link, and can fully reflect the early warning and detection capabilities. However, it does not fully consider the resolution and contrast, and the model complexity is high.

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