This segment covers the period from 06 June 2020 to 11 September 2020 (before the eclipse season) and has 135% data volume as a baseline, however in some orbits the data rate was increased above the baseline value.

For the eclipse season the payload will be off, on SC3 and SC4 the payload will be off during the period 02/09/2020 18:00 - 13/09/2020 00:00, and on SC1 and SC2 the payload will be off during the period 05/09/2020 00:00 - 13/09/2020 00:00. The TDA6 constraints (no BM1 and BM2 modes)are: on C1/C2 - 04/09/2020 12:00 - 13/09/2020 00:00, on C3/C4 - 02/09/2020 00:00 - 13/09/2020 00:00.

There are manoeuvres on C2 on 12/06/2020; on C2 on 08/08/2020; and on C2 on 15/08/2020; for more information ​http://jsocwiki.rl.ac.uk/attachment/wiki/WikiStart/manoeuvres_may2020_dec2020.pdf.

Cluster crosses the magnetopause until mid-June and starts to cross neutral sheet from 10/11 July 2020. Primary science targets are skimming magnetopause, neutral sheet, Cluster/MMS/THEMIS conjunctions in the tail and ECS GI programme on sub-ion magnetic holes in the plasma sheet.