Odyssey GRS HEND Spectra (HENDS)

HENDS – HEND Spectra

Instrument: Odyssey Gamma Ray Spectrometer

PDS Data Set ID: ODY-M-GRS-2-EDR-V1.0 DOI: 10.17189/1519560

For more information about GRS EDR products, see the Data Set Catalog File.

The Gamma Ray Spectrometer Experiment Data Record (GRSEDR) HEND Spectra (HENDS) data products are composed of high-energy neutron detector (HEND) records and the associated timing and spatial information. HEND records (frames) can be one of three types: nominal (spectra), profile (time series), or status (commands). The nominal frame consists of six spectra, with 16 channels, two bytes per channel. The profile frame consists of the six spectra plus two time profiles. The inner scintillator profile is thirty seconds in duration, with a count for each second. The outer scintillator profile is also thirty seconds in duration, but has a resolution of 0.25 seconds, with a count for each interval. The timing and spatial data provided with the HEND data includes spacecraft clock values and spacecraft geometry data. The sc_ev_time, UTC time, and spatial fields are all recorded at the center of the collection interval.

GRS HENDS products have the following file names:

HEND_SPECTRA_yyyymmdd.DAT (with detached PDS label)

where:

yyyy = year

mm = month (01-12)

dd = day (01-31)

In ODE, HENDS products have the following Product IDs:

HEND_SPECTRA_YYYYMMDD