The Institute of Applied Physics observes middle atmospheric trace gases, such as ozone and water vapour, by microwave radiometry. We report on the comparison of measurements using a novel digital Fast Fourier Transform and accousto optical spectrometers. First tests made on ground are presented as well as first experience about the use of such spectrometers under aircraft conditions.

The evolution of phenomenological and microphysical approaches to radiative transfer (RT) and directional radiometry (DR) is outlined. The importance of the seminal 1887 paper by Eugen von Lommel is discussed. It is shown that owing to recent advances, the disciplines of RT and DR have finally become legitimate branches of statistical electromagnetics.

The application of microwaves in medicine has recently obtained renewed attention within the scientific community through emerging techniques in breast cancer detection (microwave tomography and ultra-wide-band radar imaging), high power ablation as well as microwave angioplasty and lipoplasty (Rosen et al., 2002). Nevertheless, more established techniques reported in the literature based on RF...

AIMS Modeling of ionic distribution fluctuations of excitable tissues based on data elicited using focused microwave radiometry. METHODOLOGY Focused Microwave Radiometry implemented to carry out measurements of in depth body temperature distributions, may provide the capability of sensing local electrical conductivity fluctuations during the cycle of actions potentials in the case of brain ex...

Microlens array homogenizers are an attractive choice in the field of radiometry and photometry to generate highly uniform beams with high efficiency. In the present paper a microlens array homogenizer used to determine the spectral responsivity of large size, partially filtered photometer is presented. The effect of nonuniformity of the field is shown to be smaller than 0.2% in the whole visib...

A new method for measuring stratum corneum hydration in-vivo, using opto-thermal transient emission radiometry with 2.94pm Er:YAG excitation and wavelength selective detection, is described. Results on skin recovery following exogenous hydration, skin stripping with Sellotape and wound healing are presented.