Radiometry is the measurement of radiant electromagnetic energy, especially that associated with the IR spectrum. It can be more simply defined as an absolute measurement of radiant flux. The typical unit of measure for imaging radiometry is radiance, which is expressed in units of Watts/(sr-cm2). (The abbreviation “sr” stands for steradian; a non-dimensional geometric ratio expressing the soli...

Abstract: Photothermal radiometry is an infrared remote sensing technique that has been used for skin and skin appendages research, in the areas of skin hydration, hydration gradient, skin hydration depth profiling, skin thickness measurements, skin pigmentation measurements, effect of topically applied substances, transdermal drug delivery, moisture content of bio-materials, membrane permeatio...

Based on the focused microwave radiometry imaging method, a novel microwave radiometry imaging system (MiRaIS) has been developed in order to explore the possibility of non-invasively measuring variations of brain activation associated with specific psychophysiological tasks. The radiometric output voltage fluctuations could be attributed to electrical conductivity variations of excitable cell ...

Two special applications of ECE radiometry at W7-AS, for measurement of temperature fluctuations and non-thermal electron distributions, are presented. In the first case correlation-radiometry is applied. The fluctuation spectra are found to be composed of two components, a diffusive and a turbulent one, with relative levels of 0.L-2o/". The latter one is discussed in the frame of a turbulent m...

The combination of a cryogenic radiometer and synchrotron radiation enables detector scale realization in spectral regions that are otherwise difficult to access. Cryogenic radiometry is the most accurate primary detector-based standard available to date, and synchrotron radiation gives a unique broadband and continuous spectrum that extends from x ray to far IR. We describe a new cryogenic rad...

THE MEASUREMENT OF INTERNAL TEMPERATURE ANOMALIES IN THE BODY USING MICROWAVE RADIOMETRY AND ANATOMICAL INFORMATION: INFERENCE METHODS AND ERROR MODELS

Digital airborne imaging is established in practice. Still there are continuous changes in the layout of the digital sensors itself, but also in the processing chains and calibration processes. This current status will shortly be highlighted within this paper. No empirical results are given but a more general overview with focus on the differences between geometric and radiometric aspects of di...