Calibrating ground‐based microwave radiometers: Uncertainty and drifts

Detection of calibration drifts in spaceborne microwave radiometers using a vicarious cold reference

The coldest possible brightness temperatures observed by a downward-looking microwave radiometer from space are often produced by calm oceans under cloud-free skies and very low humidity. This set of conditions tends to occur with sufficient regularity that an orbiting radiometer will accumulate a useful number of observations within a period of a few days to weeks. Histograms of the radiometer...

Interferometric Imaging Technology for Microwave Radiometers 41 Interferometric Imaging Technology for Microwave Radiometers

Since 1957, when the first man made satellite opened the space age of human history, satellite earth observation has been taking advantage of high altitude to look at the globe and have applications in the areas of weather forecasting, oceanography, land survey and resource discovery, environmental and disaster monitoring, as well as applications in the area of defence. The observational freque...

Calibration of Microwave Radiometers: an Overview

INTRODUCTION This paper describes 1) the progress of the work of the IEEE Geoscience and Remote Sensing Society (GRSS) Instrumentation and Future Technologies Technical Committee (IFT-TC) Microwave Radiometer Working Group and 2) an overview of the calibration issues of microwave radiometers as an introduction to a dedicated session.

Soil water infiltration observation with microwave radiometers

Experiments were conducted using truck-based microwave radiometers operating at 1.41(L-band) and 2.65-GHz (S-band) horizontal polarization to observe small plots during and following sprinkler irrigation. These experiments were conducted on a sandy loam soil in 1994 and a silt loam in 1995. Sandy loam soils typically have higher infiltration capabilities than clays, and in our studies, we were ...

Soil Moisture Sensing with Microwave Radiometers