augmented at a level recommended by this scientific assessment. While the costs of obtaining the data that will be needed in the coming decade are difficult to estimate, an increase of 25 percent over the current budget, or a notional budget increment of $20 million over the decade, may be required.

Suborbital Program

NASA-supported balloon and rocket experiments, known collectively as the Suborbital program, enable science, develop technology, and provide an invaluable training ground (Figure 7.7). Many highly successful Explorer missions, such as GALEX and WMAP, were preceded by balloon-borne observations and technology demonstrations.

FIGURE 7.7 Launch of the balloon-borne instrument ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission) in 2009. SOURCE: NASA/GSFC/JPL/UCSB.

FIGURE 7.7 Launch of the balloon-borne instrument ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission) in 2009. SOURCE: NASA/GSFC/JPL/UCSB.



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