HR: 0800h
AN: B21A-0044    [Abstracts]
TI: Derivation of Time Series Vegetation Map from MODIS over Taiwan
AU: * Dashnyam, G
EM: gerelmaa@mail.atm.ncu.edu.tw
AU: Liu, G R
EM: grliu@csrsr.ncu.edu.tw
AU: Kuo, T H
AU: Lin, T H
AB: The monitoring of land-cover and its greenness is very important for modern environmental issue. Satellite remote sensing can serve as a very suitable tool for gathering such relevant temporal information for various analyses. However, there are many factors, such as atmospheric (cloud, aerosols etc) effects, view and sun angle's effects and geometric distortions, should be considered during the task. This study is to carry out the derivation of the time series vegetation index from satellite data with considering above mentioned effects. In the study, the characteristic of the different wavelength solar radiation interacted with the different surface are analyzed, and find out the suitable cloud masking threshold based on the visible and near infrared brightness temperature/reflectance for Taiwan region. Also the viewing and sun angle effects are analyzed for each 3x3 pixel window and try to find out their correlation relationship between vegetation index and angles. Finally the vegetation maps for a given time period can be derived with MODIS.
DE: 0480 Remote sensing
SC: Biogeosciences [B]
MN: 2007 Fall Meeting