Implementation and evaluation of the landsat ecosystem disturbance adaptive processing systems (LEDAPS) model: A case study in the Colombian andes [Implementación y evaluación del modelo Landsat Ecosystem Disturbance Adaptive Processing System (LEDAPS): Estudio de caso en los Andes colombianos]

Q4 Environmental Science
G. M. Valencia, J. Anaya, F. Caro-Lopera
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引用次数: 5

Abstract

espanolEn este trabajo se hace un analisis de la reflectividad obtenida con una serie de imagenes Landsat procesadas con el modelo LEDAPS en una region de los Andes Colombianos. Fueron calibradas 38 imagenes de los sensores TM y ETM con el modelo LEDAPS con el fin de evaluar las diferencias de reflectividad entre las bandas de un mismo sensor, las diferencias entre sensores, y los patrones temporales. Se utilizaron pruebas estadisticas no parametricas exactas que permitieron concluir: a) la reflectividad superficial entre bandas (1-5 y 7) es distinta y que esta diferencia se mantiene entre escenas de fechas distintas; b) al comparar las bandas de igual longitud de onda entre los sensores TM y ETM+ hay altas similitudes estadisticas entre las bandas; c) las variaciones temporales en reflectividad desde el ano 1986 a 2013 con los sensores estudiados no son significativas. Estos resultados estan sustentados con la implementacion de modelacion robusta con varios metodos resistentes a observaciones inusuales y otros problemas tipicos de la modelacion de minimos cuadrados clasicos. EnglishThis paper analyzes the reflectance obtained with a series of Landsat images processed with LEDAPS model in a region of the Colombian Andes. A total of 38 images of TM and ETM sensors were calibrated to surface reflectance using LEDAPS in order to determine difference among bands of the same sensor, difference between sensors and analyze temporal patterns. Exact nonparametric statistics allow to conclude that: a) surface reflectance for band 1–5 and 7 were significantly different and this difference remains among images of different dates; b) there are statistical similarities between the TM and ETM sensors bands; c) temporal variations on surface reflectance from the years 1986 to 2013 with the sensors studied are not statistically significant. These results are supported by the implementation of robust modeling with various methods resistant to unusual observations and other typical problems of the classical least squares modeling.
landsat生态系统扰动自适应处理系统(LEDAPS)模型的实施与评价:哥伦比亚安第斯山脉案例研究[landsat生态系统扰动自适应处理系统模型的实施与评价:哥伦比亚安第斯山脉案例研究]
西班牙这项工作分析了哥伦比亚安第斯山脉一个地区用LEDAPS模型处理的一系列陆地卫星图像获得的反射率。使用LEDAPS模型校准了38张TM和ETM传感器的图像,以评估同一传感器波段之间的反射率差异、传感器之间的差异和时间模式。使用了准确的非参数统计测试,得出的结论是:(a)波段(1-5和7)之间的表面反射率不同,并且这种差异在不同日期的场景之间仍然存在;b) 在比较TM和ETM+传感器之间的等波长波段时,波段之间有很高的统计相似性;c) 1986年至2013年期间,使用所研究的传感器,反射率的时间变化并不显著。这些结果得到了鲁棒建模实现的支持,该建模采用了几种方法,可以抵抗异常观测和经典最小平方建模的其他典型问题。英文本文分析了哥伦比亚安第斯山脉一个地区用LEDAP模型处理的一系列陆地卫星图像获得的反射率。共有38张TM和ETM传感器图像使用LED校准为表面反射率,以确定同一传感器频带之间的差异、传感器之间的差异并分析时间模式。准确的非参数统计数据得出的结论是:(a)1-5和7波段的表面反射率差异很大,不同日期的图像之间仍然存在这种差异;b) TM和ETM传感器频带之间存在统计相似性;c) 1986年至2013年期间,所研究传感器的表面反射率的时间变化在统计上并不显著。这些结果得到了各种方法的鲁棒建模的实施的支持,这些方法抵抗不寻常的观测和经典最小二乘建模的其他典型问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Scopus: Journal of East African Ornithology
Scopus: Journal of East African Ornithology Environmental Science-Ecology
CiteScore
0.60
自引率
0.00%
发文量
0
期刊介绍: Journal of East African Ornithology has been published since 1977 by the Bird Committee of the East Africa Natural History Society. Originally titled Scopus, the addition of Journal of East African Ornithology began with our January 2018 issue. The journal is published Open Access twice a year, typically in January and July. Authors retain copyright and their work is licensed under the Creative Commons Attribution 4.0 International License. Our copyright and licensing agreement only applies from January 2018 onwards, and does not apply to previously published issues. Users have the right to read, download, copy, distribute, print, search, or link to the full texts of these articles.
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