BARREL: Bremsstrahlung X-ray Spectra from Balloon Campaigns, 0.05s Resolution

Over 50 stratospheric balloons carried X-ray spectrometers to detect electron precipitation from Earth's radiation belts. The BARREL mission, a NASA Living with a Star project, collected four-channel, 50-millisecond resolution data from campaigns in Antarctica (2013-2014) and Sweden (2015-2016). This data provides the first balloon measurements of relativistic electron precipitation coordinated with in-situ satellite observations.

Use Cases

• Modeling relativistic electron precipitation spatial scales based on multi-balloon array data.
• Correlating X-ray bremsstrahlung spectra with in-situ plasma wave measurements from the Van Allen Probes.
• Analyzing temporal variations in electron precipitation using the 50-millisecond fast time resolution.
• Studying magnetic local time (MLT) dependencies of precipitation using the balloon constellation design.

Strengths

• Provides four channels of data (FSPC1-FSPC4) with a fast 50-millisecond time resolution.
• Data collected from over 50 balloon flights across four campaigns spanning 2013 to 2016.
• Coordinated measurements with the Van Allen Probes mission and other ground-based instruments like EISCAT.

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 tasks.
• Data may reflect geographic bias inherent to collection from specific Antarctic and Arctic sites.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

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

Time Range

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

Freshness

Last updated 2026-03-13 13:59:06.515779; freshness should be verified.

Geography

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