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