Year 7
Oct 2021-Oct 2022
Year 8
Oct 2022 - Oct 2023
Year 9
Oct 2023 - Oct 2024
Year 10
Oct 2024 - Oct 2025
Plus, there are Charts showing predicted outer cusp encounters at this link

Year 11
Oct 2025-Oct 2026
Year 12
Oct 2026-Oct 2027
Year 13
Oct 2027-Oct 2028
Year 14
Oct 2028-Oct 2029

Year 9

PhaseRegionTimeline Files from S. Petrinec
These are planning files, not actuals
Spacecraft Separations
Additional Notes

Extended Mission 3 - Year 1

Phase 9a29 RE Dusk Flank

Phase 9b

29 RE DaysideMMS_orbit_Phase9B_and_conjunctions_v1a.pptx
Phase 9c29 RE Dawn Flank

Phase 9d29 RE Nightside






Year 8

Extended Mission 2 - Year 3

PhaseRegionTimeline Files from S. Petrinec
These are planning files, not actuals
Spacecraft Separations
Additional Notes
Phase 8a:29 RE Dusk FlankMMS_orbit_Phase8A_and_conjunctions_v1.pptx
Phase 8b:29 RE DaysideMMS_orbit_Phase8B_and_conjunctions_v1.pptx
Phase 8c:29 RE Dawn FlankMMS_orbit_Phase8C_and_conjunctions_v1.pptx
Phase 8d:29 RE Nightside

MMS_orbit_Phase8D_and_conjunctions_v2.pptx






Year 7

Extended Mission 2 - Year 2

Phase 7a:

~10/6/21-11/28/21

29 RE Dusk Flank

Phase 7b:

~11/28/21-04/28/22

29 RE DaysideMMS_orbit_Phase7B_and_conjunctions.pptxfast_mode_times_agse1_2021296-000000_2022171-000000_V004_v1.dat

Phase 7c:

~04/28/22-06/9/22

29 RE Dawn FlankMMS_orbit_Phase7C_and_conjunctions.pptx

Phase 7d:

~06/9/22~10/10/22

29 RE Nightside

MMS_orbit_Phase7D_and_conjunctions_v3.pptx

MMS_orbit_Phase8B_and_conjunctions_v1.pptx
(adjustments due to Artemis-1 Launch attempts)

fast_mode_times_agse1_2022107-000000_2022343-000000_V004_v3.dat

LongShadows_update19July2022.pptx






Year 6

Extended Mission 2 - Year 1

MMS_Year6_Orbits&Phases.png

Phase 6a:

~10/6/20-11/24/20

29 RE Dusk FlankMMS_Ph6A_ConOps_20200908[1].pptx

Phase 6b:

~11/24/20-04/27/21

29 RE DaysideMMS_Ph6B_ConOps_20201118.pptx

Phase 6c:

~04/27/21-06/24/21

29 RE Dawn Flank

Phase 6d:

~06/24/21~10/10/21

29 RE Nightside





Year 5

Extended Mission 1 - Year 3


MMS_Year5_Orbits&Phases.png

Phase 5a:

~09/30/1019 - 11/24/2019

29 RE Dusk FlankMMS_EM5A_orbits_20190821.pptx
timelines_orbs1046_1061.pdf
fast_mode_times_agse1_EM5A.dat ← offsets submitted

3 SROI


Phase 5b:
~11/24/2019 - 04/23/2020
29 RE DaysideMMS_Ph5B_ConOps_20191029.pptx

3 SROI

Parker Solar Probe perihelion alignment

11/28-11/30 - formation resize to <20km>

11/26 (DOY 330) - 34% moon shadow

12/27 (DOY 361) - 73% moon shadow - timeline

Solar Wind SROI: FPI electrons: 4eV-940eV / FPI ions: 197eV-9222eV

Phase 5c:
~04/23/2020 - 06/19/2020

29 RE Dawn FlankFormation resize to 40km: planned for 4/14-16/2020

Phase 5d:
~06/22/2020 - 10/02/2020

29 RE NightsideLong Eclipses (~5.124 hr):  8/13/2020 and 8/17/2020






Phase 4a:

September 28, 2018

25RE Dusk Flank

(Dwell time outside BS (0.3 nPa < 10 hrs)

MMS_4A_SROIs_v2.pptx

3 SROI

20 km Oct 18

Phase 4b:

November 29, 2018

25RE Dayside

(Dwell time outside BS (0.3 nPa)  > 10 hrs)

before apogee raise: MMS_half4B_SROIs_v2.pptx
after apogee raise: MMS_4B_turbulencecampaign_SROIs_Final.pptx
+ timeline charts

Ref: from Ergun --> guidelines for Solar Wind Turbulence Campaign
Ref: from MOC -->
TurbulenceCampaignFinalDates.ppt

3 SROI

Apogee raise to 29RE
20 km Mar 13

Solar Wind Turbulence Campaign

Phase 4c:

~April 16, 2019 - ~June 28, 2019

29RE Dawn Flank

(Dwell time outside BS (2.3 nPa) < 10 hrs)

MMS_proposed_SROIs_EM4C_26mar2019.zip

3 SROI

40 km May 22

Phase 4d:

~June 29, 2019 - ~September 29, 2019

1st 29RE Nightside

(Apogee within avg. MP (~2.3 nP))

MMS_EM4D_orbits_20190520.pptx

3 SROI

06/04/2019 (DOY 155) 09:17:13.29495 - MMS3 Processor reset

30 km Sep 8






Year 3

Extended Mission 1 - Year 1


MMS_Year3_Orbits&Phases.png



Phase 3a:

September 1, 2017

25RE Dusk FlankMMS_3a_SROIs_792-817_dusk_timelines.pdf

1 SROI

Perigee Raise Oct 3
30 km Oct 11
20 km Nov 8

Phase 3b:

November 14, 2017

25RE DaysideMMS_3b_SROIs_818-860_dayside_timelines.pdf3 SROI, 1st use of SW modes

Phase 3c:

March 13, 2018

25RE Dawn Flank

3 SROI

40 km May 16

Phase 3d:

May 25, 2018

2nd 25RE NightsideMMS_3d_SROIs_886_930_mtail_timelines.pdf3 SROI





Year 2

Prime Mission  - Year 2


MMS_2017Orbits_GSE.png

Phase 2a:

January 31, 2017

Apogee raise, Dawn No science ROIs planned in Phase 2A

No FPI ops

60 km Feb 1
Apogee Raise Feb 9
160 km Apr 26

Phase 2b:

May 1, 2017

1st 25RE Nightside
Completion of Prime Mission
MMS_2b_SROIs_748-793_mtail_timelines.pdf

1 SROI

60 km May 18
30 km Jun 1
20 km Jun 29






Year 1

Prime Mission - Year 1


MMS_2016Orbits_GSE.jpg

Phase 1a:

September 1, 2015

1st 12RE Dayside
60 km DOY 259/260 (Sept 16/17)
25 km DOY 273/274 (Sept 30/Oct 1)
10 km DOY 287/288 (Oct 14/15)
40 km Dec 16
10 km Jan 13


Phase 1x:

March 8, 2016

12RE Dawn, Nightside, Dusk No science ROIs planned in Phase 1x

No FPI Ops

40 km Mar 24
10 km Sep 1

Phase 1b:

Sept 12, 2016

2nd 12RE Dayside7 km Sep 15 






March 15, 2015

Nightside --> Dusk Flank


160 km DOY 188/190 (July 7/9)

Selected datasets only
BBF campaign

12RE Orbit25RE Orbit29RE Orbit
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