Universiti Teknologi Malaysia Institutional Repository

Validation of MODIS data for localized spatio-temporal evapotranspiration mapping

Hashim, Mazlan and Nadzri, M. I. (2013) Validation of MODIS data for localized spatio-temporal evapotranspiration mapping. In: 8th International Symposium of the Digital Earth, ISDE 2014, 26-29 Aug, 2013, Kuching, Sarawak, Malaysia.

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Official URL: http://dx.doi.org/ 10.1088/1755-1315/18/1/012182

Abstract

Advancement in satellite remote sensing sensors allow evapo-transpiration (ET) from land surfaces to be derived from selected reflectance and emmitance in visible and thermal infrared wavelengths, such as using Moderate Solution Imaging Spectrometer (MODIS). In this paper, we report the validation of recent MODIS-generated higher-order global terrestrial ET product 16A2. The main focus of this paper is to devise the follow-up calibration for the localised region covering the entire Malaysia peninsular. The validation is carried out locally by dividing the study area into 3 distinct climatological regions based on the influence to monsoons, and using multi-temporal MODIS data acquired in 2000-2009. The result, evidently show the local effects still inherit in the MODIS 16A2 products; with varying R2 within the 3 local climatological regions established (Northwest = 0.49 South = 0.47, and Southwest = 0.52; all with P < 0.001). The accuracy each region validated is within + RMSE 43mm for monthly ET. With P value in acceptable range, the correction is useable for further usage.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:calibration, data acquisition
Subjects:Q Science > QC Physics
Divisions:Others
ID Code:63204
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:18 Jun 2017 08:24
Last Modified:18 Jun 2017 08:24

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