• Calibration

Image Calibrations

I've been given an SPC directory, how do I know which calibrations have been performed?

Radiometric Calibration

SPC normally uses images that have no radiometric calibration, so the image pixel values will be DN and not I/F. However, the easiest way to check is to use the USGS ISIS tool raw2isis. To use raw2isis, you need to know the number of bits in the image (i.e. 8-bit or 16-bit), the endianness [i.e. big-endian (BE or LSB) or little-endian (LE or MSB)], and the pixel/line number (usually 512x512 or 1024x1024 for a framing camera).