BARREL Mission Bremsstrahlung X-ray Spectra from Antarctic and Arctic Balloon Campaigns

NASA's BARREL mission provides 256-channel Bremsstrahlung X-ray spectra with 32-second time resolution, detected by NaI scintillators aboard stratospheric balloons. The data, covering an energy range from 0 MeV to 10 MeV, was collected to study relativistic electron precipitation from Earth's radiation belts. Over 50 balloon payloads were launched across campaigns in Antarctica (2013-2014) and Sweden (2015-2016).

Use Cases

• Analyze the SSPC variable, which combines 256 energy channels, to identify temporal patterns in relativistic electron precipitation events.
• Correlate Bremsstrahlung X-ray spectra with magnetic local time (MLT) data to study spatial scales of precipitation mapped to the radiation belts.
• Use the 0-10 MeV energy range data to validate or constrain models of electron loss processes in the magnetosphere.
• Integrate the 32-second resolution X-ray measurements with concurrent Van Allen Probes in-situ data to investigate wave-particle interaction drivers.

Strengths

• Provides 256-channel spectral resolution for detailed energy distribution analysis of Bremsstrahlung X-rays.
• Data was collected from over 50 stratospheric balloon flights across four dedicated campaigns, offering multiple observational periods.
• Specifically designed to coordinate with the comprehensive Van Allen Probes mission, enabling multi-instrument studies.

Limitations

• Sample data and specific row/column counts are unavailable, hindering initial assessment of dataset size and structure.
• Primary data files are in specialized BIN format, requiring specific tools or libraries for access and processing.
• Observations are limited to specific geographic regions (Antarctica and Arctic Sweden) and campaign periods, not providing continuous global coverage.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Measured by X-ray spectrometers (SSPC) and DC magnetometers carried on approximately 20 kg stratospheric balloons.

Time Range

Campaigns conducted in January-February 2013, 2014 (Antarctica) and August 2015, 2016 (Sweden).

Freshness

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Geography

Balloon launches from Halley Bay and SANAE IV base in Antarctica, and the Esrange Space Center in Kiruna, Sweden.