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		<isbn>978-85-17-00088-1</isbn>
		<label>59895</label>
		<citationkey>SantosCarnJesu:2017:DeEsCo</citationkey>
		<title>Derivada espectral como técnica de extração de informações de espectros de reflectância de corpo hídrico do baixo curso do Rio Subaé, Bahia</title>
		<format>Internet</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
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		<size>933 KiB</size>
		<author>Santos, Erli Pinto dos,</author>
		<author>Carneiro, Ayala de Souza Reis,</author>
		<author>Jesus, Taise Bonfim de,</author>
		<electronicmailaddress>erlitec.agri@hotmail.com</electronicmailaddress>
		<editor>Gherardi, Douglas Francisco Marcolino,</editor>
		<editor>Aragão, Luiz Eduardo Oliveira e Cruz de,</editor>
		<e-mailaddress>daniela.seki@inpe.br</e-mailaddress>
		<conferencename>Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)</conferencename>
		<conferencelocation>Santos</conferencelocation>
		<date>28-31 maio 2017</date>
		<publisher>Instituto Nacional de Pesquisas Espaciais (INPE)</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<pages>3894-3901</pages>
		<booktitle>Anais</booktitle>
		<organization>Instituto Nacional de Pesquisas Espaciais (INPE)</organization>
		<transferableflag>1</transferableflag>
		<abstract>The techniques of processing data of remote sensing have provide a best comprehension of structures ecosystems and your interaction with the electromagnetic radiation. But, there are methodological difficulties  for the processing of high resolution hyperspectral data for insulation limnological variables relationship on radiometric data of detected reflectance by the sensors in field (in situ), directly influencing in choose of technique for use in mathematical modeling, it is difficult the analysis using only originals spectra. In this sense the technique of derivative analysis of the hyperspectral data, calculation attribute, was used with a goal of study the variation of  optically active components (COAs) in water, through of data from field. The studied environment was the low course of river Subaé, Santo Amaro city, state of Bahia. The procedures of mathematical modeling adopted was the derivation by finite approximation of values of reflectance of filtrated originals spectra and first derived (for the second order) related the a finite band of wavelength. It was observed a relation between the behavior of spectrorradiometric originals curves, the obtained curves from the spectra derivate technique and chlorophyll-a concentrations. The first order derivative presented satisfactory results for features of chlorophyll-a. However the obtained graphics with application of second derivative, presented strong irregularity of values derived, its related to other COAs which were not included in the modeling. From the methodological procedure was possible to demonstrate the potential of successive derivation, corroborating with other authors.</abstract>
		<area>SRE</area>
		<type>Radiometria e sensores</type>
		<language>pt</language>
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