The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
1212 
(a) ASTER Digital Number 
(b) ASTER Acquisition Date 
(c) MODIS Surface Reflectance 
(d) Normalized MODIS-like Surface Reflectance 
Figure 2. Seven ASTER scenes in digital number (a) acquired from different dates (b) are normalized to the MODIS-like surface 
reflectance (d) by using a MODIS surface reflectance (c) acquired on April 10, 2006 as reference.