TIROS-2 FMRT: First Space-Based Meteorological Radiation Measurements

TIROS-2 satellite data from November 1960 provides the first meteorological radiation measurements from space, covering a five-month operational period. The dataset contains radiance values from a five-channel scanning radiometer, expressed as blackbody temperatures or radiant emittance across infrared and visible wavelengths. Data is stored in its original IBM 7094 36-bit binary format, with one file per satellite orbit.

Use Cases

• Analyzing early instrument performance degradation based on documented channel failure timelines.
• Studying historical atmospheric radiation patterns using the 8.0-12.0 micron atmospheric window channel.
• Tracing the technological lineage of satellite radiometry by comparing with follow-on TIROS-3, -4, and -7 instruments.
• Calibrating modern climate models with foundational space-based observations from 1960-1961.

Strengths

• Represents a historically significant first: the first radiometer to make meteorological measurements from space.
• Provides detailed sensor specifications, including a 55 km nadir footprint and five distinct spectral channels with defined wavelength ranges.
• Has clear provenance with a named Principal Investigator (Joseph D. Barksdale, NASA GSFC) and a legacy identifier (ESAD-00113).

Limitations

• Instrument suffered significant degradation; channels 1 and 4 were useless by January 1961, and channels 3/5 had extremely low signal-to-noise.
• Data format is a proprietary 36-bit binary TAP file from IBM 7094 machines, requiring specialized tools for access and interpretation.
• Metadata completeness is low; column names, row counts, and exact spatial coverage are not provided in the available descriptions.

Provenance

Source

NASA Goddard Space Flight Center (GES_DISC), Principal Investigator Joseph D. Barksdale.

Collection Method

Recovered from original Final Meteorological Radiation Tapes (FMRT) written on IBM 7094 machines.

Time Range

Approximately five months from satellite launch on November 23, 1960.

Freshness

2026-04-09 21:45:12.995581

Geography

Global coverage from satellite orbit, with ground traces forming elliptical, parabolic, or hyperbolic patterns.