A Study of Compensation for Temporal and Spatial Physical Temperature Variation in Total Power Radiometers

Author

Chae, Chun-Sik ; Kwon, Ji-Hoon ; Kim, Yong-Hoon

Author_Institution

Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA

Volume

12

Issue

6

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

2306

Lastpage

2312

Abstract

This paper describes a study of compensation for the physical temperature variation in microwave radiometers. The compensation method is derived by using a multivariable least squares estimation with a radiometer model with temperature-dependent parameters for three system blocks. The feasibility of the method is demonstrated with several experiments with a Ka-band total power radiometer and a temperature control system developed to test the method in various thermal conditions. The results show that the compensation method can be applied to calibrate microwave radiometers without switching systems and is expected to compensate internal temperature gradients and temporal variation of physical temperature.

Keywords

least squares approximations; microwave measurement; radiometers; thermal variables measurement; compensation method; microwave radiometers; multivariable least squares estimation; spatial physical temperature variation; temporal physical temperature variation; total power radiometers; Calibration; Microwave radiometry; Radio frequency; Radiometers; Temperature distribution; Temperature measurement; Temperature sensors; Microwave radiometer; microwave remote sensing; radiometer calibration; temperature variation;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2012.2185690

Filename

6138273