Some EFI-TII Gain Map Calibration was executed on the three Swarm spacecraft between 7 and 11 December 2021 in the following time windows:

Swarm Alpha:

• from 7 December at 21:18 to 8 December at 00:49 UTC
• from 8 December at 22:09 to 9 December at 01:40 UTC
• from 9 December at 21:26 to 10 December at 00:57 UTC

Swarm Bravo:

• from 8 December at 21:44 to 9 December at 01:15 UTC
• from 9 December at 21:24 to 10 December at 00:55 UTC
• from 10 December at 21:04 to 11 December at 00:35 UTC

Swarm Charlie:

• from 7 December at 21:17 to 8 December at 00:47 UTC
• from 8 December at 22:08 to 9 December at 01:39 UTC
• from 9 December at 21:26 to 10 December at 00:57 UTC

During this time intervals no EFI-LP data were generated.