The first two examples show two different CSTOL commands that are translated into the same spacecraft command, indicating that this spacecraft command takes different values as an argument. In the last example, the CSTOL command is translated to another CSTOL command, which would then be translated into a spacecraft command in still-human-readable textual format. The command can be uplinked as-is if the spacecraft has the ability to read the text format. Otherwise, the command is translated to a packed binary representation on the ground, prior to uplink. Spacecraft command languages Open source and government-sourced languages Commercial languages See also Command language Domain-specific language Natural-language user interface Programming Language Synchronous programming language Space exploration References Domain-specific programming languages