BARREL 3G: Bremsstrahlung X-ray Spectra from Balloon Campaigns for Radiation Belt Studies

48 channels of medium time resolution, 4-second Bremsstrahlung X-ray spectra detected with a NaI Scintillator, covering an energy range from 0 MeV to 4 MeV. The data was collected by NASA's BARREL mission, a multiple-balloon investigation designed to study electron losses from Earth's Radiation Belts, with campaigns conducted from 2013 to 2016. Over 50 stratospheric balloons were launched from Antarctic and Swedish stations to provide measurements of relativistic electron precipitation.

Use Cases

• Modeling relativistic electron precipitation events based on 4-second resolution X-ray spectra.
• Analyzing spatial and temporal variations in radiation belt losses based on multi-balloon constellation data.
• Correlating balloon-based X-ray measurements with in-situ satellite data from the Van Allen Probes mission.
• Characterizing the spatial scale of precipitation at relativistic energies based on the balloon array observations.

Strengths

• Data collected from over 50 balloon flights across four campaigns (2013-2016), providing a multi-year observational record.
• Spectra cover a defined energy range (0-4 MeV) with 48 channels aggregated into a single variable for analysis.
• Mission was coordinated with the Van Allen Probes and other ground/space-based instruments, enabling multi-instrument studies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale ML training.
• Data may reflect geographic bias inherent to collection from specific Antarctic and Arctic circle latitudes.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measured by X-ray spectrometers and DC magnetometers carried on stratospheric balloons.

Time Range

Campaigns conducted in 2013, 2014, 2015, and 2016.

Freshness

Last updated 2026-03-13 12:03:29.285619; freshness should be verified.

Geography

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