performance specification digital terrain elevation data

MIL-PRF-89020B3.12 Description of record contents.For each of the following records,• an ASCII character requires one byte (8 binary bits).• b is a blank.• DDD is 000 - 180 degrees.• MM is 00 - 59 minute.• SS is 00 - 59 seconds.• H is the hemisphere, N,S,E or W.• YY is the last two digits of the year.• MM is the month 01 - 12.tape only.a. Volume Header Label (VOL). The VOL is used for magneticField Length CharacterField Contents In Characters Start DescriptionVOL 3 1 Recognition sentinel.1 1 4 Fixed by standard.6 5 Reel Number. Six alphanumericcharacters identifyingthe physical reel. (Requiresleading alpha and trailingnumeric.)Blank or Non blank 1 11 Non blank indicates restrictedaccess, as the tape reel isprivately owned.Blanks 26 12 Unrequired available space.Account Number 14 38 *Account number of owner ofthis tape reel. (NIMA uses amaximum of 12 charactersleft-justified, space filled.)Blanks 28 52 Fixed by standard.1 1 80 Fixed by standard.Note: *These fields, to be defined by the producer, may be left blank.19