Saudi astronauts Rayyanah Barnawi and Ali Alqarni made a radio call with students using Amateur Radio frequencies while the International Space Station (ISS) flew over Riyadh's ground station. With the coordination of the Saudi Space Commission (SSC), in partnership with the Ministry of Education along with the Communications, Space and Technology Commission (CST) and in cooperation with the Saudi Amateur Radio Society (SARS). With the goal of educating students about scientific knowledge and satisfying their curiosity about space while inspiring them with future technologies.

During the call, the Saudi astronauts answered the students’ questions about their lifestyle in space and their routine aboard the ISS. As well as sharing personal experiences and their feelings during the journey.  

The Saudi astronauts used the Kingdom's call signal "HZ0ISS" through radio communication technology that uses very high frequencies (VHF) for radio amateurs, which operates via a voice mode transceiver communication between Earth and the ISS when it passes over the ground station, with the coordination of “ARISS" organization.

Saudi astronauts arrived at the International Space Station on May 22, 2023 on a scientific mission that seeks to conduct 14 experiments in zero-gravity environment. The results will enhance Saudi Arabia’s position globally in space exploration, serving humanity, highlighting the role of Saudi research centers and verifying their efforts in making a scientific impact in this field.