Program purpose

The XPOSE program computes the exposure of a single point in the sky for a given time range and up to ten different energy levels. The time range need not be restricted to a single viewing period. The program requires user determination of certain parameters such as event class, spectral index, zenith cutoff angle, and global scale factor. The resulting exposures are recorded in the output file "xpose.log". The sensitive areas, livetimes, and exposures for each exposure history file entry within the time limits are stored to a binary output file.