performance specification digital terrain elevation data

MIL-PRF-89020BField Length CharacterField Contents In Characters Start Description26 34 Reserved for future use.(Blank filled).DTED0, DTED1 5 60 NIMA Series Designator foror DTED2product level.15 65 Unique reference number.(For producing nations ownuse (free text or zerofilled)).8 80 Reserved for future use.(Blank filled).01-99 2 88 Data Edition Number.A-Z 1 90 Match/Merge Version.YYMM 4 91 Maintenance Date. (Zerofilled until used.)YYMM 4 95 Match/Merge Date. (Zerofilled until used.)0000 or ANNN 4 99 Maintenance DescriptionCode. (Zero filled untilused.)CCAAABBB 8 103 Producer Code.(Country -Free Text) (FIPS 10-4 CountryCodes used for first 2characters).16 111 Reserved for future use.(Blank filled).AAAAAAAAA 9 127 Product Specification.(Alphanumeric field)00-99 2 136 First digit is ProductSpecification Amendment Numberand second digit is the ChangeNumber.YYMM 4 138 Date of Product Specification.MSL, E96 3 142 Vertical Datum24