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Title: Initial assessment of an airborne Ku-band polarimetric SAR.

Abstract

Polarimetric synthetic aperture radar (SAR) has been used for a variety of dual-use research applications since the 1940s. By measuring the direction of the electric field vector from radar echoes, polarimetry may enhance an analysts understanding of scattering effects for both earth monitoring and tactical surveillance missions. Polarimetry may provide insight into surface types, materials, or orientations for natural and man-made targets. Polarimetric measurements may also be used to enhance the contrast between scattering surfaces such as man-made objects and their surroundings. This report represents an initial assessment of the utility of, and applications for, polarimetric SAR at Ku-band for airborne or unmanned aerial systems.

Authors:
;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1088069
Report Number(s):
SAND2013-1636
456398
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Raynal, Ann Marie, and Doerry, Armin Walter. Initial assessment of an airborne Ku-band polarimetric SAR.. United States: N. p., 2013. Web. doi:10.2172/1088069.
Raynal, Ann Marie, & Doerry, Armin Walter. Initial assessment of an airborne Ku-band polarimetric SAR.. United States. doi:10.2172/1088069.
Raynal, Ann Marie, and Doerry, Armin Walter. Fri . "Initial assessment of an airborne Ku-band polarimetric SAR.". United States. doi:10.2172/1088069. https://www.osti.gov/servlets/purl/1088069.
@article{osti_1088069,
title = {Initial assessment of an airborne Ku-band polarimetric SAR.},
author = {Raynal, Ann Marie and Doerry, Armin Walter},
abstractNote = {Polarimetric synthetic aperture radar (SAR) has been used for a variety of dual-use research applications since the 1940s. By measuring the direction of the electric field vector from radar echoes, polarimetry may enhance an analysts understanding of scattering effects for both earth monitoring and tactical surveillance missions. Polarimetry may provide insight into surface types, materials, or orientations for natural and man-made targets. Polarimetric measurements may also be used to enhance the contrast between scattering surfaces such as man-made objects and their surroundings. This report represents an initial assessment of the utility of, and applications for, polarimetric SAR at Ku-band for airborne or unmanned aerial systems.},
doi = {10.2172/1088069},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Feb 01 00:00:00 EST 2013},
month = {Fri Feb 01 00:00:00 EST 2013}
}

Technical Report:

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  • This report documents research into the effects of snow on candidate landmarks for the TFS radar. It includes a discussion of a simple snow model, relevant backscatter data from previous ground based collections, predictions of the effects of snow coverage based on this data, a discussion of the snow data collection with the TFS radar, and an analysis of the results of that collection. All SAR images are for a K/sub u/ band radar, with HH polarization, and a 30/degree/ depression angle. The images have three meter resolution and a one kilometer swath. SAR images were collected of both ruralmore » and urban landmarks. 5 refs., 10 figs., 19 tabs.« less
  • This report documents research into the effects of snow on candidate landmarks for the TFS radar. It includes a discussion of a simple snow model, relevant backscatter data from previous ground based collections, predictions of the effects of snow coverage based on this data, a discussion of the snow data collection with the TFS radar, and an analysis of the results of that collection. All SAR images are for a K/sub u/ band radar, with HH polarization, and a 30/degree/ depression angle. The images have three meter resolution and a one kilometer swath. SAR images were collected of both ruralmore » and urban landmarks. 5 refs., 7 figs., 19 tabs.« less
  • The PHARUS system uses a phased array antenna with solid state amplifiers. The project consisted of two phases, a definition phase and a realization phase. The definition phase consisted of the actual realization of a SAR research system called PHARS, which made its first successful testflight in November 1990. The research system is based on the concept of a wide beamwidth antenna, rigidly fixed to the aircraft. Pulse compression and a high PRF ensure sufficient sensitivity in this system, which is equipped with a 160 Watt peak pulse power solid state transmitter. The processing is done off-line. In the realizationmore » phase the polarimetric PHARUS system has been developed. The design is based on the experience gained with the PHARS system. The system uses a phased array with dual polarized patch radiators and is equipped with solid state amplifiers. This paper will give an overview of the PHARUS design and operational use. Apart from the use as an advanced polarimetric airborne SAR, there is the perspective of using PHARUS as a demonstrator for ESA`s future ASAR system. 2 refs., 2 figs., 1 tab.« less