4. Launch of strategic missions in the reinvigorated Solar-Terrestrial Probes (STP) line and in the Living With a Star (LWS) line to accomplish the survey committee’s highest-priority science objectives. This element includes first the notional IMAP investigation and then DYNAMIC and MEDICI in the STP program and GDC as the next larger-class LWS mission.


Figure 6.1 shows a proposed implementation of the core program, in which each of the assets required to achieve the goals of the survey committee’s recommended solar and space physics program have their


FIGURE 6.1 Heliophysics budget and program plan by year and category from 2013 to 2024. The solid black line indicates the funding level from 2013 to 2022 provided to the survey committee by NASA as the baseline for budget planning, and the black dashed line extrapolates the budget forward to 2024. After 2017 the amount increases with a nominal 2 percent inflationary factor. Through 2016 the program content is tightly constrained by budgetary limits and fully committed for executing existing program elements. The red dashed “Enabling Budget” line includes a modest increase from the baseline budget starting in 2017, allowing implementation of the survey-recommended program at a more efficient cadence that better meets scientific and societal needs and improves optimization of the mix of small and large missions. From 2017 to 2024 the Enabling Budget grows at 1.5 percent above inflation. (Note that the 2024 Enabling Budget is equivalent to growth at a rate just 0.50 percent above inflation from 2009.) Geospace Dynamics Constellation, the next large mission of the LWS program after Solar Probe Plus, rises above the baseline curve in order to achieve a more efficient spending profile, as well as to achieve deployment in time for the next solar maximum in 2024. NOTE: LWS refers to missions in the Living With a Star line, and STP refers to missions in the Solar-Terrestrial Probes line.


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