Possible effects of clear-air refractive-index perturbations on SAR images

Andreas Muschinski; Fred M. Dickey; Armin W. Doerry

doi:10.1117/12.605651

16 May 2005 Possible effects of clear-air refractive-index perturbations on SAR images

Andreas Muschinski, Fred M. Dickey, Armin W. Doerry

Proceedings Volume 5788, Radar Sensor Technology IX; (2005) https://doi.org/10.1117/12.605651
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

Airborne synthetic aperture radar (SAR) imaging systems have reached a degree of accuracy and sophistication that requires the validity of the free-space approximation for radio-wave propagation to be questioned. Based on the thin-lens approximation, a closed-form model for the focal length of a gravity wave-modulated refractive-index interface in the lower troposphere is developed. The model corroborates the suggestion that mesoscale, quasi-deterministic variations of the clear-air radio refractive-index field can cause diffraction patterns on the ground that are consistent with reflectivity artifacts occasionally seen in SAR images, particularly in those collected at long ranges, short wavelengths, and small grazing angles.

Citation Download Citation

Andreas Muschinski, Fred M. Dickey, and Armin W. Doerry "Possible effects of clear-air refractive-index perturbations on SAR images", Proc. SPIE 5788, Radar Sensor Technology IX, (16 May 2005); https://doi.org/10.1117/12.605651

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available