README.ANC The files In the \ANCIL subdirectory are the volume descriptors for each of the three tapes used to store the original full scene. V1 is the volume descriptor for volume one, bands 1, 2, and 3. V2 is the volume descriptor for volume two, bands 4, 5, and 6. V3 is the volume descriptor for volume three, band 7. Each volume descriptor is 1 record of 1536 bytes.