Due to some EFI-TII Gain Map Calibration executed on the three Swarm spacecraft on 19, 20, and 21 July 2021, no EFI LP L1B data are available for the following time-windows:

Swarm Alpha:

• 19 July from 10:21 to 13:57 UTC
• 20 July from 09:39 to 13:15 UTC
• 21 July from 10:31 to 14:07 UTC

Swarm Bravo:

• 19 July from 09:50 to 13:26 UTC
• 20 July from 09:30 to 13:07 UTC
• 21 July from 10:45 to 14:21 UTC

Swarm Charlie:

• 19 July from 10:21 to 13:57 UTC
• 20 July from 09:39 to 13:15 UTC
• 21 July from 10:31 to 14:07 UTC