Ulysses SCE: 1-Second Radio Doppler Data from 1991 Solar Conjunction

Ulysses SCE 1-sec Radio Doppler Data C1 includes dual-frequency (S- and X-band) data sampled at one-second resolution from the Ulysses spacecraft's superior conjunction with the Sun. The data were derived from raw tracking station data in Archival tracking Data Files (ATDFs) by the Radio Science Support group at the Jet Propulsion Laboratory. The validated data covers August 6 to September 5, 1991, with a total volume of 32.4 MB for compressed files and 161.8 MB for uncompressed ASCII data.

Use Cases

• Analyzing solar corona density and turbulence based on dual-frequency radio Doppler data.
• Studying signal propagation effects during a spacecraft's superior solar conjunction.
• Modeling plasma dynamics in the solar wind using high-resolution (1-second) Doppler shifts.
• Calibrating or validating Deep Space Network (DSN) tracking receiver performance.

Strengths

• Provides high-resolution dual-frequency (S- and X-band) Doppler data sampled at one point per second.
• Includes a detailed document file listing each tracking pass with start/end times, station overlaps, and other metadata.
• Total validated data volume is specified as 32.4 MB (compressed) and 161.8 MB (uncompressed).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Radio Science Support group at the Jet Propulsion Laboratory, NASA.

Collection Method

Derived from raw tracking station data in Archival tracking Data Files (ATDFs) from the Deep Space Network.

Time Range

August 6 to September 5, 1991.

Freshness

Last updated 2026-03-13 05:27:26.163978; freshness should be verified.

Geography

Data collected from ground tracking stations (DSS) during the Ulysses spacecraft's solar conjunction.