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- W2486444214 abstract "A high order computer language called ALOFT has been developed for the checkout and operation of complex space oriented equipment such as the proposed NASA Space Shuttle. The flexibility of the language makes it equally suited for use with existing launch vehicles such as Saturn, Titan, etc. and space systems such as Space Station, Viking, etc. With such flexibility it can be assumed that the language will be equally acceptable to future vehicles, space experiments, etc. Flexibility is obtained by making the language independent of any test system and providing for the user to define a wide variety of words and functions, This later capability also makes it independent of the device it is testing. The paper describes the language and its syntax. It also shows its ability to operate in a multidiscipline environment independent of the test system. LANGUAGE CHARACTERISTICS ALOFT has been designed to be independent of the test system and of any particular test article. The language does, however, contain capabilities to enable it to cope with Space Shuttle peculiar features and requirements. A study of these features and requirements, along with the general test and checkout problem, resulted in the determination that the capabilities described below should be included in the language. Test oriented capabilities: Test initiation; Application of stimulus; Measurement of output; Comparison of results; Man/machine interfaces; Records and logs with time tags; Monitoring; Clock and time controlled actions; System, subsystem, and unit testing. Independence with respect to testing equipment via: Dictionary data banks; Common character set; Statements which are free form with respect to input media; Minimum interaction with operating system; Test writer-created safing features. Flexibility provided by: Full arithmetic and relational operator set; Thirty-two character data names; List and table capability; Simple loop capability; Subroutines; Integer, fixed point, Boolean, text, binary, and time data; Simple numeric and Boolean assignment statements; Unconditional and simple conditional transfers; Interrupt initiated routines. Engineering reader orientation with: English words for primitives; Natural English forms as delimiters; Natural statement structure; Generalized commenting capability. Concurrent test execution provisions: Initiated via language primitives; Synchronization capability; Interrupt capability; Meaning dependent on language processor Implementation. Self-extension through: Macro definition capability; Other language capability; Special communications requirements: Computer to computer; Computer to data bus." @default.
- W2486444214 created "2016-08-23" @default.
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- W2486444214 date "1971-01-01" @default.
- W2486444214 modified "2023-09-27" @default.
- W2486444214 title "Aloft : A Language Oriented to Flight Engineering & Testing" @default.
- W2486444214 hasPublicationYear "1971" @default.
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