  ULTRASAT (ULtra-violet TRansient Astronomy SATellite) is a wide-angle space
telescope that will perform a deep time-resolved all-sky survey in the
near-ultraviolet (NUV) spectrum. The science objectives are the detection of
counterparts to short-lived transient astronomical events such as gravitational
wave sources and supernovae. The mission is led by the Weizmann Institute of
Science and is planned for launch in 2026 in collaboration with the Israeli
Space Agency and NASA. DESY will provide the UV camera, composed by the
detector assembly located in the telescope focal plane and the remote
electronics unit. The camera is composed out of four back-metallized CMOS Image
Sensors (CIS) manufactured in the 4T, dual gain Tower process. As part of the
radiation qualification of the camera, Single Event Effect (SEE) testing has
been performed by irradiating the sensor with heavy ions at the RADEF,
Jyvaskyla facility. Preliminary results of both Single Event Upset (SEU) and
Single Event Latch-up (SEL) occurrence rate in the sensor are presented.
Additionally, an in-orbit SEE rate simulation has been performed in order to
gain preliminary knowledge about the expected effect of SEE on the mission.
