An on-orbit upgrade and maintenance operation of BDS-3 MEO-23 satellite, BDS-3 MEO-27 satellite, and BDS-3 MEO-28 satellite will be carried out from 18 April 2026. According to the maintenance process, a single satellite will be set to be unusable for about 4 hours. 

As for BDS-3 MEO-23 satellite, the detailed duration is from UTC 18 April 2026, 22:00, to UTC 19 April 2026, 02:00; as for BDS-3 MEO-28 satellite, the detailed duration is from UTC 19 April 2026, 04:00, to UTC 19 April 2026, 08:00; as for BDS-3 MEO-27 satellite, the detailed duration is from UTC 19 April 2026, 08:00, to UTC 19 April 2026, 12:00.