wireless communication over non-terrestrial networks (ntn) have become a major boost of interest since the launch of sos messaging via satellites on the iphone 14. besides ntn in 5g, the technology is also added for legacy technologies such as nb-iot. the main use case is to provide global network coverage via satellites in case of an emergency in rural or remote areas as well as worldwide tracking. the r&s cmw500 mobile radio tester, the unrivaled network simulator for all iot technologies, supports latest 3gpp release 17 nb-ntn technology for r&d and type approval testing.