This segment covers the period from 03 December 2021 to 19 March 2022(before and including majority of the long eclipses season 2021) and has 140% data volume as a baseline.

For the eclipse season the payload will be off, the preliminary dates are:

• C1: 25/02/2022 20:00 - 29/03/2022 14:00
• C2: 23/02/2022 14:00 - 31/03/2022 20:00
• C34: 25/02/2022 20:00 - 22/03/2022 19:00

There is no moon eclipses during this segment.

There will be manoeuvres 09/02/2022 on C134, on 17/02/2022 on C1234, on 24/02/2022 on C3, the full list of manoeuvres for this period is included here ​​http://jsocwiki.rl.ac.uk/attachment/wiki/WikiStart/manoeuvres_mar2021_apr2022.pdf.

Cluster crosses the predicted bow shock from: C2 - 24/12/2021, C1 - 26/12/2021, C34 - 04/01/2022.

The main science targets are the magnetopause, bow shock, magnetosheath, conjunctions between Cluster with MMS and/or THEMIS, and hiss origin. The primary science target is magnetosheath high-speed jets. The BM1 data for the PEACE/WHISPER cross-calibration in the magnetosheath also will be collected.

Special operations for three BM1 intervals with good conjunctions between Cluster and MMS&THEMIS during eclipse season are also planned.