Uncalibrated Neutron SpectraUncalibrated, or raw, neutron spectra are obtained by the Neutron Spectrometer instrument and consist of fifteen histograms, event data, and associated timing and spatial information. The neutron event data consists of the cumulative counts of neutrons detected at one of four prisms over a collection interval. The times listed (sc_ev_time, UTC time, and spatial fields) all denote the center of the collection interval.
More information on the Neutron Spectra may be found in the EDR Dataset Description. This type of data is sometimes called "LANL data," after the Los Alamos National Laboratory, which designed the Neutron Spectrometer.
Overview of Uncalibrated DataUncalibrated data are raw data that has had associated timing and spatial information added. A full description may be found in the 2001 Mars Odyssey Gamma Ray Spectrometer EDR NASA Level 0 Software Interface Specification (EDR SIS).
Gamma-Ray Spectrometer Instruments BackgroundThe Mars Odyssey Gamma-Ray Spectrometer (GRS) is a suite of three instruments working together to collect data that map the elemental concentrations on the surface of Mars. The three instruments are: