Five CubeSats launched aboard South Korea’s Nuri rocket have successfully made contact with ground stations, joining the mission’s primary payload—the next-generation midsize satellite No. 3—in confirming their status on Thursday.

The seven remaining CubeSats will attempt communication individually, according to their own schedules, which are handled by their respective developers’ ground stations.

Because contact attempts are staggered, the timeline for determining initial mission success will vary, and the Korea Aerospace Administration said it will provide a consolidated assessment on December 2, five days after launch.

The main payload, satellite No. 3, reached its target orbit and had completed fourteen two-way communication sessions with ground stations as of noon Thursday.

It first reported its status at 1:55 a.m., 42 minutes after launch, through the King Sejong Station in Antarctica, followed by additional passes over the Daejeon ground station and facilities in Svalbard and elsewhere, totaling 12 confirmed links so far.

Officials said the latest contact confirmed that the satellite’s core systems are functioning, and further sessions with Daejeon and other stations will gather detailed telemetry.

The satellite will undergo two months of initial operations and payload checks before commencing its one-year mission in a sun-synchronous orbit, circling Earth approximately 15 times per day to observe auroras and space plasma phenomena.