Analysis of Earth Aledo Effect on Digital Sun Sensor;

Set changchun city for example,the paper study on urban heat island and its control by retrieving land surface temperature,surface albedo and normalized vegetation index in clear sky condition based on LandSat7 ETM+ data,analyzing distributing status of land surface temperature and its relation with surface albedo and normalized vegetation index.

Remote sensing parameters (surface temperature, vegetation index and surface albedo) are extracted from NOAA-AVHRR data and used to study heat island effect of Shanghai city in summer and winter seasons.

Using the land-surface radiation data observed at the Semi-Arid Climate and Environment Ob- servatory of Lanzhou University,the variation rule of land-surface radiation over the semi-arid region of the Loess Plateau was preliminarily analyzed,and the monthly averages of surface radiation balance,surface albedo and influence mechanism were completely studied.

Study on Urban Heat Island Changes in Beijing Using Normalized Difference Vegetation Index and Albedo Data

Surface parameters from the MODIS data have surface temperature(ts), albedo(α),and normalized difference vegetation index(NDVI).

Although many studies on rural areas have been published,there is no validation of Moderate Resolution Imaging Spectroradiometer(MODIS) albedo over urban areas available.

The stimulated data obtained by the Lowtran Disort coupled model show that the parameter is not quite sensitive to surface albedo but highly sensitive to the whole atmospheric aerosol optic depth at the best observing direction.