SSL-SWT 1 Aug 6-8, 2007 THEMIS Extended Phase Summary of THEMIS team discussions (Please note: this is work in progress)

SSL-SWT 2 Aug 6-8, 2007 ARTEMIS “Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon’s Interaction with the Sun” ARTEMIS

SSL-SWT 3 Aug 6-8, 2007 What are the important magnetospheric questions after THEMIS, before MMS? Distant magnetotail (after Geotail and WIND – single spacecraft) What is the nature and extent of the distant tail neutral line? Does the tail vanish in response to Interplanetary Coronal Mass Ejections? What are the dimensions and topology of plasmoids (carry ½ energy of storms) Answers necessitate multiple THEMIS-type satellites at R E scales Solar Wind and Shocks (after multiple missions: Cluster, ISEE1/2) How do shocks accelerate particles? (Shock acceleration or diffusion) What is the nature of solar wind turbulence in 1-10RE scale lengths (no data) Answers necessitate multiple THEMIS-type satellites at 1-20R E scales Lunar Wake (after Lunar Prospector and WIND) What are the plasma waves that make up the nature of the Lunar Wake? How does the wake fill-in from near the moon to far down What makes up, sustains and dissipates the electric fields behind the wake Answers necessitate multiple THEMIS-type satellites at ,000km scales

SSL-SWT 4 Aug 6-8, 2007 ARTEMIS Science Objectives Acceleration in shocks, tail and lunar environment What is the nature of acceleration at shocks? Follow evolution of particle distributions at two points along the shock. How do MeV electrons get accelerated in the tail? Measure field topology, particle spectra and evolution in time and space. How do energetic (100s of keV) ions and electrons get accelerated in the wake? Measure particles and fields in the wake and the solar wind simultaneously. Reconnection What is the distant tail reconnection onset mechanism, effects and response to solar wind drivers? Spontaneous or induced? Continuous or impulsive? Answers necessitate multiple THEMIS-type satellites at 1-20R E scales Lunar Wake (after Lunar Prospector and WIND) What are the plasma waves that make up the nature of the Lunar Wake? How does the wake fill-in from near the moon to far down What makes up, sustains and dissipates the electric fields behind the wake Measure particles and fiels in the wake and outside at ,000km distance

SSL-SWT 5 Aug 6-8, 2007 ARTEMIS Mission Profile

SSL-SWT 6 Aug 6-8, 2007 ARTEMIS Mission Phases Phase I (Oct ’09 – Oct ’10) - placement

SSL-SWT 7 Aug 6-8, 2007 ARTEMIS Select Orbits Phase II (Oct ’10 – Jan ’11) Opposite Sides – Sun-Earth Alignments

SSL-SWT 8 Aug 6-8, 2007 Phase II (Oct ’10 – Jan ’11) Opposite Sides– Dawn-Dusk Alignments ARTEMIS Select Orbits

SSL-SWT 9 Aug 6-8, 2007 Phase III (Jan ’11 – Apr ’12) Same Side – Sun-Earth Alignments ARTEMIS Select Orbits

SSL-SWT 10 Aug 6-8, 2007 Phase III (Jan ’11 – Apr ’12) Same Side – Dawn-Dusk Alignments ARTEMIS Select Orbits

SSL-SWT 11 Aug 6-8, 2007 ARTEMIS Wake Crossings: Phase II,III

SSL-SWT 12 Aug 6-8, 2007 ARTEMIS Wake Crossings: Phase II,III

SSL-SWT 13 Aug 6-8, 2007 ARTEMIS Distant Wake Crossings: A Perspective BB

SSL-SWT 14 Aug 6-8, 2007 Phase IV (Apr ’12 – May ’13) ARTEMIS After Insertion

SSL-SWT 15 Aug 6-8, 2007 ARTEMIS Wake Crossings

SSL-SWT 16 Aug 6-8, 2007 ARTEMIS Ground Operations Concept DSN, 34m TLM, TRK, CMD Translunar Orbits OVRO, 40m TLM Receive Only BGS, 11m TRK & CMD Lunar Orbits Flight Dynamics –Translunar Orbit: JPL: Mission Design, Orbit Determination, Ephemeris, Maneuver Planning UCB: Attitude Determination –Lunar Orbit: UCB: Mission Design, Orbit/Attitude Determination, Ephemeris, Maneuver Planning Mission Operations (UCB) –Pass Scheduling, Mission Planning & Command Generation –Data Trending & Anomaly Resolution, ITOS CMD & Control Science Operations (UCB) –Follows Standard THEMIS practices Alternate Downlink: OVRO – Refurbishment+Ops: ~1M – Can track >3hrs/day – A 40m dish: better than DSN – Saves government >$10M

SSL-SWT 17 Aug 6-8, 2007 ARTEMIS Science Team Tail Plasmoids, ScalesSlavin, Murphy Rx/HeatingOieroset, Schriver TurbulenceWeygand, Velli Acceleration, ScalesSlavin, Murphy Solar Wind Shock accelerationEastwood, Bale TurbulenceVelli, Weygand ForeshockEastwood Wake Computer sim’sTravnicek, Schriver, Farrell Laboratory sim’sGekelman ExosphereDelory Refilling, BeamsHalekas, Farrell, Bale

SSL-SWT 18 Aug 6-8, 2007 Senior Review panel – Decides how to apportion funds between continuing missions (Voyager, Cluster …) – Evaluates and approves plans for FY09/10; hears proposals for FY11/12 THEMIS ends in FY09, would request funding for FY10 and present plan for FY11/12 THEMIS – extension funding request for FY10 with further extension in FY11/12 ARTEMIS – proposal to slowly ramp up in FY08/09 and move to operations in FY11/12 Costs – Cost Guidance would be sufficient to continue THEMIS with minimal operations Hinges on scientific publications and discoveries made by THEMIS now Reviewed on basis of past performance as indicator for future output – Guest Investigator program to accompany THEMIS extended mission, also possible Hinges on quality and accessibility of THEMIS data, and community involvement – Cost increase due to ARTEMIS team and mission operations may necessitate new funds Senior review panel chair may have to obtain additional funding from Heliophysics director Received recommendation to proceed with a combined proposal Timeline – Proposal due February 21 Review of Mission Archive Plan: March Presentations: April Selection Jun 12, 2008 THEMIS Extended Phase Proposal