NEAR Gamma-Ray Spectrometer (GRS)


    The Gamma-Ray Spectrometer consists of a prime detector and shield detector mounted on the instrument deck. The prime detector is a 2.5 x 7.5 cm NaI (Tl) scintillator with a field of view of about 60 degrees and 8.5% FWHM minimum resolution at 662 keV. The shield detector is an 8.9 x 14 cm BGO scintillator cup with 15% FWHM minimum resolution at 662 keV. The Gamma-Ray Spectrometer can measure an energy range from 0.3 to 10 MeV in 10-keV channels. Gamma-rays are produced by naturally occurring radioactive elements such as K, Th, and U, and by the interaction of cosmic ray protons and energetic particles associate with solar flares with other elements near the surface such as Fe, Si, O, Mg, and H. They can be detected from material from the s... ...Show More

    Identifier (LID)




The data sets listed in the table below are PDS3 legacy data sets. Once these data sets have been migrated to PDS4 they will be listed in the section above.

Data Processing Level Data set ID Mission phase Browse Download
Raw data (level 1b):
NEAR-A-GRS-2-EDR-CRUISE2-V1.0 Cruise 2 299 Mb 53 Mb
NEAR-A-GRS-2-EDR-EARTH-V1.0 Earth Flyby 144 Mb 15 Mb
NEAR-A-GRS-2-EDR-CRUISE3-V1.0 Cruise 3 269 Mb 44 Mb
NEAR-A-GRS-2-EDR-CRUISE4-V1.0 Cruise 4 276 Mb 47 Mb
NEAR-A-GRS-2-EDR-EROS/ORBIT-V1.0 Eros Orbit 719 Mb 135 Mb
NEAR-A-GRS-2-EDR-EROS/SURFACE-V1.0 Eros Surface 138 Mb 13 Mb
Calibrated data (levels 2 and 3):
NEAR-A-GRS-3-EDR-EROS/ORBIT-V1.0 Eros Orbit 411 Mb 296 Mb
NEAR-A-GRS-3-EDR-EROS/SURFACE-V1.0 Eros Surface 18 Mb 6 Mb

Highlighted data products from the above volumes:

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