INFRARED REMOTE TEMPERATURE MEASUREMENTS: IT'S PHYSIC'S WITH REFERENCE TO COMPLEXITIES, APPROXIMATIONS AND LIMITATIONS INVOLVED II-TEMPERATURE PROFILE RETRIEVAL.

Abstract

With a tentative inclination to complexity, approximation and limitation aspects the process of temperature profile determination in cloudless conditions, effect of 'a priori'  statistical constraint in improving the vertical resolution, reduction of retrieval problem into Fredholm linear integral equation of first kind and its solution using regression method, and comparison of retrieved profile with radiosonde rocketsonde data have been discussed. Effect of spatially correlated errors and observation density towards limitations of satellite-based radiance measurements and the newly reported technique of channel differencing towards increasing vertical resolution of temperature measurements have been discussed. Methods of obtaining temperature profiles in the presence of clouds using single field and multiple field of views have been presented. The practices of accounting for geographical imposition of high terrain and the effect of hot terrain and a brief mention of effect of aerosols have been covered. A very short account of microwave remote temperature measurements,in order to attend to the efforts made in this direction, has also been included.