Development of VHF CARABAS II SAR

Hans Hellsten; Lars M.H. Ulander; Anders Gustavsson; Bjoern Larsson

doi:10.1117/12.243087

17 June 1996 Development of VHF CARABAS II SAR

Hans Hellsten, Lars M.H. Ulander, Anders Gustavsson, Bjoern Larsson

Proceedings Volume 2747, Radar Sensor Technology; (1996) https://doi.org/10.1117/12.243087
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

There is an increasing interest in imaging radar systems operating at low frequencies. Examples of military and civilian applications are detection of stealth-designed man- made objects, targets hidden under foliage, biomass estimation, and penetration into glaciers or ground. The developed CARABAS technology is a contribution to this field of low frequency SAR imagery. The used wavelengths offer a potential of penetration below the upper scattering layer in combination with high spatial resolution. The first prototype of the system (CARABAS I) has been tested in environments ranging from rain forests to deserts, collecting a considerably amount of data often in parallel with other SAR sensors. The work on data analysis proceeds and results obtained so far seem promising, especially for application in forested regions. The experiences gained are used in the development of a new upgraded system (CARABAS II), which is near completion and initial airborne radar tests for system verifications followed by some major field campaign are scheduled to take place during 1996. This paper will summarize the CARABAS I system characteristics and system performance evaluation. The major imperfections discovered in the radar functioning will be identified, and we explain some of the modification made in the system design for CARABAS II. A new algorithm for future real-time CARABAS data processing has been derived, with a structure well-suited for a multi-processor environment. Motion compensation and radio frequency interference mitigation are both included in this scheme. Some comments on low frequency SAR operation at UHF-based versus VHF-band will be given.

Citation Download Citation

Hans Hellsten, Lars M.H. Ulander, Anders Gustavsson, and Bjoern Larsson "Development of VHF CARABAS II SAR", Proc. SPIE 2747, Radar Sensor Technology, (17 June 1996); https://doi.org/10.1117/12.243087

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