Ota test and/or measurement system, and ota testing method

An over-the-air, OTA, testing method of testing a non-terrestrial network device under test (NTN) DUT, the OTA testing method comprising:

• providing the NTN DUT and placing the NTN DUT in a measurement zone;
• providing at least one antenna positioner with at least one radio frequency, RF, antenna being attached to the at least one antenna positioner, he at least one RF antenna is configured to transmit and/or receive RF signals;
• and
• controlling, by a control circuit, the at least one antenna positioner and/or the at least one RF antenna to perform a satellite emulation;
• wherein performing the satellite emulation comprises at least one of controlling the at least one RF antenna to emulate a transmission characteristic of at least one satellite, controlling the at least one RF antenna to emulate a reception characteristic of the at least one satellite, controlling the at least one antenna positioner unit to emulate a relative position between the DUT and the satellite, or controlling the at least one antenna positioner to emulate a trajectory of the at least one satellite.