Radiometric Correction of LandsatTM Data -example of how to do radiometric corrections

Radiometric Correction of Landsat Data GEOG 535 January 15, 2004 Introduction Typically, when one acquires remotely-sensed information for academic or commercialised message subprograms it is unsuitable for warm map. That is, several types of department of department of corrections must(prenominal) be applied. One stigmatize of corrections that is crucial to the use of remotely-sensed info, peculiarly in quantifiable geography, is known as radiometric correction. though thither are more classes of radiometric corrections, this paper ordain point on the following tercet: sensor related corrections, reason- cheerfulness place correction and solar zenith angle corrections, and atmospheric corrections. detector related do bear on to sensor-specific changes in the data when a remote sensor converts the figureing entry radiance to digital numbers. Earth- solarize surmount corrections look for differences in illumination repayable to the variable distance of the earth from the solarize. Similarly, solar zenith angle corrections account for illumination differences due to variations in the apparent position of the sun carnal knowledge to the earth. Finally, atmospheric corrections adjust the attenuating and/or scattering effects of the earths cash simple machine on electromagnetic radiation. We will see through rest slip exactly what these corrections do and why they are inevitable vis-à-vis their application to remotely-sensed data of the city of Ottawa, Canada.

Aim The aim of this excogitate is to progress to an understanding of the principles of the radiometric corrections described above and measure out their effect(s) on satellite images as well as data derived from give tongue to images, much(prenominal) as vegetation indices and ghostlike signatures. The data employ in this exercise consists of six images of Ottowa, Canada obtained from Landsat TM 5 bands 1-5 and 7. Methods Part 1 The purpose of this particle of the study is see how at-satellite phantasmal reflectance varies with changes in the distance between the earth and the sun and the position of the sun relative to the earth. To see... If you want to get a full essay, rank it on our website: Ordercustompaper.com

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