The Xi'an Satellite Control Center will exercise an south-north orbital control to FY-4A from 8:00 to 15:00 March 18, 2021(UTC). During the period, ground receiving stations shall cease to receive the cloud imageries sent by FY-4A from 8:00 to 15:00(UTC). Under a normal circumstance, the imageries’ positioning accuracy will see some bias within 24 hours after the orbital control. Please forgive the inconvenience caused.