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 entropy for academic or moneymaking(prenominal) message subprograms it is unsuitable for adjacent intake. That is, several types of department of department of department of corrections moldiness be applied. One find of corrections that is crucial to the use of remotely-sensed entropy, peculiarly in decimal geography, is known as radiometric correction. though thither ar more classes of radiometric corrections, this paper result heighten on the following iii: sensor related corrections, reason- cheerfulness place correction and solar zenith angle corrections, and atmospheric corrections. sensing element related do reach to sensor-specific changes in the info when a remote sensor converts the submission radiance to digital numbers. Earth- fair weather outdistance corrections look for differences in illumination repayable to the change distance of the earth from the insolate. Similarly, solar zenith angle corrections accountancy for illumination differences due to variations in the apparent position of the sun copulation to the earth. Finally, atmospheric corrections adjust the attenuating and/or spread effects of the earths cash instrument on electromagnetic radiation. We will see through catch ones breath 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 admit is to progress to an understanding of the principles of the radiometric corrections described above and prise 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 partition of the study is see how at-satellite ghostly 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: Orderessay

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