5G NTN (Non-Terrestrial Network) added in 3GPP Release 17 is the standard for direct communication between mobile phone and not only base stations placed on the ground, but also low orbit satellites (LEOs), geostationary satellites (GEOs) and high altitude platform station(HAPS).In this seminar, we will explain the latest 5G NTN standards for Release 17 and Release 18 which is currently being developed, as well as explain 5G NTN market trends. We will also introduce the measurement solutions necessary to realize 5G NTN.