Staggered SAR: From Concept to Experiments with Real Data

نویسنده

  • Michelangelo Villano
چکیده

Staggered SAR is an innovative synthetic aperture radar (SAR) concept, where the pulse repetition interval (PRI) is continuously varied. This, together with digital beamforming (DBF) in elevation, allows high-resolution imaging of a wide continuous swath without the need for a long antenna with multiple azimuth apertures. Criteria for the design of sequences of PRIs and data processing strategies are presented, together with some system design considerations. The impact of staggered-SAR operation on image quality is furthermore assessed, using highly oversampled F-SAR airborne data and operating TerraSAR-X in staggered-SAR mode.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Staggered SAR: Imaging a Wide Continuous Swath by Continuous PRI Variation

Synthetic aperture radar (SAR) remote sensing allows high-resolution imaging independent of weather conditions and sunlight illumination and is therefore very attractive for the systematic observation of dynamic processes on the Earth’s surface. However, conventional SAR systems are limited, in that a wide swath can only be achieved at the expense of a degraded azimuth resolution. This limitati...

متن کامل

Multichannel Staggered SAR Azimuth Sample Regularization

Next-generation spaceborne SAR systems pose demanding and contradicting requirements on system design, owing to the increasing need to cover ultra-wide swaths with high azimuth resolution, as required for numerous applications. To this end, a large number of multichannel SAR system concepts have been proposed that employ digital beamforming on receive with planar arrays, and more recently also ...

متن کامل

Modified Omega-k Algorithm for High-Speed Platform Highly-Squint Staggered SAR Based on Azimuth Non-Uniform Interpolation

In this work, the staggered SAR technique is employed for high-speed platform highly-squint SAR by varying the pulse repetition interval (PRI) as a linear function of range-walk. To focus the staggered SAR data more efficiently, a low-complexity modified Omega-k algorithm is proposed based on a novel method for optimal azimuth non-uniform interpolation, avoiding zero padding in range direction ...

متن کامل

Comprehensive RF safety concept for parallel transmission MR.

PURPOSE The goal of this study is to increase patient safety in parallel transmission (pTx) MRI systems. A major concern in these systems is radiofrequency-induced tissue heating, which can be avoided by specific absorption rate (SAR) prediction and SAR monitoring before and during the scan. METHODS In this novel comprehensive safety concept, the SAR is predicted prior to the scan based on pr...

متن کامل

Towards Patient-specific SAR Calculation for Parallel Transmission Systems

Introduction The safety assessment via the specific absorption rate (SAR) is a prerequisite for in vivo MRI experiments. In parallel transmission, such an assessment is non-trivial, since the local SAR distribution does not only depend on the individual patient anatomy, but also on the multi-channel excitation. In general, patient safety can be achieved by carrying out simulation-based SAR calc...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014