Most satellites are launched with fix hardware and software that can’t be changed, but the US Air Force is funding a project to launch a fleet of craft that can be updated in orbit to carry out a new mission
Source:
https://www.newscientist.com/article/2253922-us-air-force-chameleon-satellites-can-be-reconfigured-in-orbit/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home