Continuous 21cm Hydrogen Line Drift Scan Survey

Continuous 1-second-cadence power spectra of the 21cm neutral hydrogen line at 1420.405 MHz are recorded from a fixed omnidirectional observer on the US East Coast. The dataset, created by author 'phanerozoic', was last updated on the platform in April 2026. It represents a drift scan survey where Earth's rotation scans the beam across the galactic plane daily.

Use Cases

• Analyze temporal variations in spectral power at 1420.405 MHz to study interstellar medium dynamics.
• Model the daily drift scan pattern caused by Earth's rotation to map the galactic plane.
• Forecast future spectral power values using the continuous 1-second-cadence time-series data.
• Detect transient events or anomalies in the 2 MHz wide power spectrum recordings.

Strengths

• Continuous 24/7 recording provides uninterrupted temporal coverage.
• High temporal resolution with 1-second cadence per spectrum.
• Data is self-timestamped, ensuring accurate time-series alignment.

Limitations

• Specific row count, total size, and exact time range are unknown.
• Geographic coverage is limited to a single fixed observer on the US East Coast.
• Data completeness and potential instrumental gaps are not detailed.

Provenance

Source

Recordings from a radio telescope pointed at the whole sky, author 'phanerozoic'.

Collection Method

Drift scan survey using a fixed omnidirectional observer; Earth's rotation provides the scan.

Time Range

Indefinite recording; specific start and end dates are unknown.

Freshness

Last updated on the platform in April 2026.

Geography

Fixed observer location on the US East Coast.