REFLECTIVITY STUDIES OF PASSIVE MICROWAVE CALIBRATION TARGETS AND ABSORPTIVE MATERIALS

Published

July 30, 2010

Author(s)

Dazhen Gu, Amanda Cox, Derek A. Houtz, Dave K. Walker, James P. Randa, Robert L. Billinger

Abstract

We report the characterization of blackbody reflections as a part of the recent progress on the development of brightness standards for microwave remote sensing at National Institute of Standards and Technology (NIST).Three blackbody targets at variable temperatures used for airborne and/or satellite systems along with a metal plate made of aluminum were measured in terms of their reflection coefficients by horn antennas in connection with a vector network analyzer (VNA) in the WR-42 waveguide band. Precision measurements of reflection are needed for blackbody emissivity computation to supplement the brightness temperature measurement of blackbody targets. All experiments were carried in a couple of distance ranges by free-space methods in an anechoic chamber. Preliminary results show negligible reflections from the calibration targets, indicating near ideal blackbody characteristics in the measured frequency range.

Proceedings Title

2010 IEEE international Geoscience and Remote Sensing Symposium

Conference Dates

July 25-30, 2010

Conference Location

Honolulu, HI

Pub Type

Conferences

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Keywords

Blackbody targets, brightness standard, free-space measurement, reflection coefficients

Citation

Gu, D. , Cox, A. , Houtz, D. , Walker, D. , Randa, J. and Billinger, R. (2010), REFLECTIVITY STUDIES OF PASSIVE MICROWAVE CALIBRATION TARGETS AND ABSORPTIVE MATERIALS, 2010 IEEE international Geoscience and Remote Sensing Symposium, Honolulu, HI, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906017 (Accessed October 1, 2025)