Odyssey GRS Gamma Spectra (GAMMAS)

GAMMAS – Gamma 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) Gamma Spectra (GAMMAS) data products are composed of raw gamma spectra and the associated timing and spatial information. The gamma spectra consists of the cumulative counts of gamma rays at the detector over one collection interval binned into 16384 channels based on energy. The collection interval is approximately 19.7 seconds, but may vary over the course of mapping. The timing and spatial data provided with the gamma spectra 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 GAMMAS products have the following file names:

GAMMA_SPECTRA_yyyymmdd.DAT (with detached PDS label)

where:

yyyy = year

mm = month (01-12)

dd = day (01-31)

In ODE, GAMMAS products have the following Product IDs:

GAMMA_SPECTRA_YYYYMMDD