The MESSENGER GRS Derived Analysis Products (DAPs) are maps of gamma-ray count rates or elemental abundances derived from summed GRS data, each with a corresponding one standard deviation error map.

 
Citation P. Peplowski (APL), MESSENGER E/V/H GRNS 5 GAMMA RAY SPECTROMETER DAP V1.0, NASA Planetary Data System, 2013.
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Data Set Abstract Abstract ======== The GRS experiment is a gamma-ray spectrometer designed to observe spectra of gamma rays emitted from Mercury's surface in the energy range from 0.1 to 10 MeV. This data set consists of the MESSENGER GRS advanced data products (DAPs), which are jpeg2000 maps of gamma-ray count rates or elemental abundances derived from summed GRS data, each with a corresponding one standard deviation error map.
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    Additional Information
    Mission Information MESSENGER
    Data Set Information MESS-E/V/H-GRNS-5-GRS-DAP-V1.0
    Instrument Host Information MESS
    Instrument Information GRS
    Target Information CALIBRATION
    EARTH
    MERCURY
    VENUS