chemical methods ( actinometry ) depend on the measurement of the extent to which a chemical reaction occurs under the influence of uv light. two chemical actinometers have been used in this research. in one method, the mixtures of potassium peroxidisuiphate butanol solutions were irradiated for various time intervals, and ph-changes were determined. a linear relationship was observed between t...

Conventionally defined, radiometry is the field that studies the measurement of electromagnetic radiation in terms of its power, spectral characteristics, and other parameters. The term applies to electromagnetic radiation characterization in a wavelength range from nanometers to tens of microns and at all optical power levels. Because radiometry is defined so broadly, a wide variety of measure...

Thls paper explores the potential for airborne remote sensing for atmospheric sciences research. Passive and active techalques from the microwave to visible bands are discussed. It is concluded that technology has progressed sufficiently in several areas that the time Is right to develop and operate new remote sensing instruments for use by the community of atmospheric scientlste as general pur...

The problem of high resolution radiometry imaging is considered. An iterative method of radiometry image processing is presented in the paper. The problem of image reconstruction is considered as the inverse ill-posed problem. The method proposed makes use of the iterative technique and regularization procedure to improve image quality. Nonlinearity of the method is provided by a nonnegative co...

Two different designs of analog correlators for radiometry are compared in this paper. A continuum correlator based on a microwave nonlinear device is a simple and inexpensive way to detect wide-band polarized signals. Analysis and extensive measurements including linearity, dynamic range, amplitude response, phase balance, and stability are presented, and the suitability of the designs for mic...

Interferometric synthetic aperture radiometry is a relative new technique in the area of microwave earth observation to measure the brightness temperature distribution of the earth. It can enhance the spatial resolution of the passive microwave remote sensing effectively. Steady progress of this technology have been achieved in both one dimensional and two dimensional cases since 1990’s. The ty...

Comparative planetology of the giant planets is key to the origin and evolution of the solar system and, by extension, extrasolar systems. In particular, elemental composition of well-mixed atmospheres is the most critical measurement, but it is also most challenging. This is because the well-mixed region for certain species lies well below the clouds, a deep region where measurements are diffi...

OBJECTIVE Microwave Radiometry is a non-invasive method which determines within seconds the in vivo temperature of internal tissues at a depth of 3-7 cm with an accuracy of ±0.2°C. In this proof-of-concept study, we tested the hypothesis that, in absence of relevant clinical signs, increased local temperature detected by microwave radiometry reflects subclinical synovial inflammation, using ult...