What does GHA mean in NASA?

Gha

The letter Ƣ has been used in the Latin orthographies of various, mostly Turkic languages, such as Azeri or the Jaŋalif orthography for Tatar. It usually represents a voiced velar fricative but is sometimes used for a voiced uvular fricative. All orthographies using it have been phased out, so the letter is not well-supported in fonts. It can still be seen on pre-1983 books published by the People’s Republic of China. Historically, it is derived from a handwritten form of the small Latin letter q, around 1900. The majuscule is then based on the minuscule. Its use for stems from the linguistic tradition of representing such sounds by q in Turkic languages and in transcriptions of Arabic or Persian. In alphabetical order, it comes between G and H. Unrelated letters transcribed gha, typically representing a voiced aspirated stop rather than a fricative, occur in scripts descended from Brāhmī script.

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