A PRIMARY OBJECTIVE OF BOTH WFIRST AND EUCLID IS TO PROVIDE A 3D MAP OF THE DISTRIBUTION OF MATTER ACROSS A SIGNIFICANT FRACTION OF THE UNIVERSE FROM THE WEAK LENSING SHEAR FIELD BUT TO DO SO REQUIRES ACCURATE REDSHIFTS TO THE BILLIONS OF GALAXIES THAT COMPRISE THE WEAK LENSING SAMPLES OF THESE SURVEYS.
$74,990FY2020National Aeronautics and Space AdministrationNASA
California Institute Of Technology, Pasadena CA