Hello, on this zip file you have : SPOTZhangbei20020823.bil Subset of the SPOT2/HRV1 Generic Binary array file (data stored by row), band interleaved by line (BIL) format Data are stored in the order (line1,band1),(line1,band2),(line1,band3),(line2,band1),... Data format is an unsigned integer (2 bytes) Data Type is litlle endian (Host Intel, ENVI data type=0) Pixels are registered by their upper left corner Envi header file (.hdr) is available GENERAL CHARACTERISTICS Acquisition Date : 23/8/2002 Acquisition Hour : 3:38:45 Samples : 152 Lines : 151 Bands : 3 Solar zenith angle (°) : 31.01 Solar azimuth angle (°) : 158.04 PROJECTION CHARACTERISTICS This image was geo-referenced by INRA Map Projection Name : UTM, 50 North Datum : WGS-84 Units : units = meters Pixel Size (Easting) : 2.0000000000e+001 Pixel Size (Northing) : 2.0000000000e+001 Upper Left Corner Easting : 304833.919 Upper Left Corner Northing : 4573788.217 RADIOMETRIC CHARACTERISTICS REFLECTANCE = DIGITAL COUNT / 1000 TOA reflectance (Top of Atmosphere)