Ulysses SCE 1-sec Radio Doppler Data C4: February-March 1995

February 22 to March 14, 1995, dual-frequency (S- and X-band) radio Doppler data sampled at one-second resolution from the Ulysses spacecraft's fourth superior conjunction with the Sun. The 30.0 MB (compressed) dataset was derived from raw Deep Space Network tracking data and provided by the Jet Propulsion Laboratory's Radio Science Support group. Data files are organized by day-of-year and tracking station, with a companion document listing pass details.

Use Cases

• Modeling solar corona plasma effects based on dual-frequency Doppler measurements.
• Analyzing signal propagation delays and scintillation from one-second sampled tracking data.
• Studying temporal variations in the solar wind during a specific superior conjunction event.
• Calibrating or validating spacecraft tracking and navigation algorithms.

Strengths

• Data is sampled at a high one-second temporal resolution.
• Includes dual-frequency (S- and X-band) measurements for comparative analysis.
• Total validated data volume is specified (30.0 MB compressed, 149.8 MB uncompressed).
• A companion document file provides detailed metadata for each tracking pass.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is from a specific 21-day period in 1995, limiting temporal generalizability.

Provenance

Source

Jet Propulsion Laboratory Radio Science Support group, NASA.

Collection Method

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

Time Range

February 22 to March 14, 1995.

Freshness

Last updated 2026-03-13 05:26:25.295684; freshness should be verified.

Geography

Data recorded from Deep Space Network tracking stations; target is the Ulysses spacecraft near solar conjunction.