DAWN GRAND MAP VESTA HYDROGEN ABUNDANCE
                                      V1.0
A global map of the abundance of
hydrogen in micrograms/g within the regolith of asteroid
4 Vesta is provided for two-degree equal-angle pixels.  Hydrogen
abundances were determined from epithermal neutron counting data
acquired by the NASA Dawn mission's Gamma Ray and Neutron Detector
(GRaND) while in low altitude …