performance specification digital terrain elevation data

MIL-PRF-89020B3.6.2.1 Nine (9) Track Tape. The physical characteristics of Nine (9)track magnetic tape are as follows:a. Length: 2400 feet (maximum).b. Width: .5 inch.c. Nine track recording format.d. Odd parity.e. Inter-record gap: .6 inch for 1600 bits per inch (BPI) Tapes;.3 inch for 6250 BPI Tapes.f. Physical end-of-tape markers at the beginning (beginning-oftapemarker) and end of the tape (end-of-tape marker).g. Density-recording methods.(1) 1600 BPI/Phase encoded.(2) 6250 BPI/Group Coded Recording (GCR). Preferred NIMAdata exchange format (shall not be used unless agreed to by sender andreceiver).3.6.2.2 Eight millimeter (8mm) Tape. The physical characteristicsof Eight millimeter (8mm) magnetic tape cartridges are as follows:a. Length: 112 meters (maximum).b. Width: 8 mm.c. Helical recording format.d. Physical end-of-tape markers at the beginning (beginning-oftapemarker) and end of the tape (end-of-tape marker).cartridge.e. Density-recording methods. 5, 7, 10, 14 GB per data3.6.3 Type of Input/Output (I/O). The individual records contain nosystem dependent generated control words.3.7 Record characteristics on Magnetic Tape.3.7.1 Recorded labels. American National Standard Magnetic Tape Labelsfor Information Interchange X3.27-1978. Recorded in ASCII code.3.7.2 Data records.a. Record size. Variable length, maximum 7214 bytes, minimum 14bytes, modal (average) 2414 bytes.b. Blocking factor. 1:1 (block size = record size).6