Earth limb infrared clutter model from measurements

Michael Kendra; Donald Mizuno; Kathleen Kraemer; Robert O'Neil

doi:10.1117/12.890199

16 September 2011 Earth limb infrared clutter model from measurements

Michael Kendra, Donald Mizuno, Kathleen Kraemer, Robert O'Neil

Proceedings Volume 8155, Infrared Sensors, Devices, and Applications; and Single Photon Imaging II; 81550Q (2011) https://doi.org/10.1117/12.890199
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

Mid-Course Space Experiment (MSX) infrared (IR) observations in the earth limb were used to obtain spatial power spectral densities (PSDs) for five sensor bands over a wide range of earth limb background clutter conditions. These backgrounds include daytime, nighttime, terminator, aurora, polar mesospheric cloud, atmospheric gravity wave, stratospheric warming, airglow, and other observations collected over approximately 100 episodic data collection events. Using a subset of detectors and restricting detector tangent altitude variations, a total of more than 33,000 high-quality PSDs were generated. For infrared detection of unresolved objects where the solid angle of the object is much smaller than the instantaneous field-of-view of a sensor element, the spectral component at high spatial frequencies is a critical metric. PSDs were therefore constructed in the spatial domain using one minute data segments, which allowed spatial scale assessment from 0.01-10 cycles/km. PSDs that met the clutter model selection criteria were identified, accumulated, and processed to obtain a small set of empirical, altitude-based model parameters. We describe the MSX sensor bands, data and data processing employed for PSD generation and final reduction to obtain model parameters. Key model features are discussed with emphasis on object detection against stressing limb backgrounds. The model was constructed in a way that facilitates optical design and system engineering application. In particular, it may be used to address Space Situational Awareness (SSA) questions.

Citation Download Citation

Michael Kendra, Donald Mizuno, Kathleen Kraemer, and Robert O'Neil "Earth limb infrared clutter model from measurements", Proc. SPIE 8155, Infrared Sensors, Devices, and Applications; and Single Photon Imaging II, 81550Q (16 September 2011); https://doi.org/10.1117/12.890199

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KEYWORDS

Data modeling

Sensors

Infrared sensors

Spatial frequencies

Earth's atmosphere

Infrared radiation

Thermal modeling

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