"In chapter one we reviewed de concepts to asses remote sensing systems and the typical errors that can mislead the measurements, at the chapter two we review the figures of merit from the ideal thermal and quantum detectors and the incidance from a gray body detected in a wavelength interval. We apply the result to a tungsten lamp. At chapter three we will perform the theoretical comparison between the detected thermal contrast measured with a quantum and a thermal detector for an earth based remote monitoring at room temperature process. At chapter four we determine the temperature distribution along a short line with continuous two wavelength thermometry on a micro surface element of the coiled coil whit a spectrometer."