NASA DC-8 Nadir Camera Imagery for GCPEx Snowfall Validation

February 20, 2012, provides the sole day of data for this collection of geo-located, visible-wavelength imagery from a nadir camera aboard the NASA DC-8 aircraft. The dataset was created by the GHRC_DAAC for the Cold-season Precipitation Experiment (GCPEx), which aimed to improve satellite-based snowfall detection algorithms. It includes ancillary aircraft navigation data and ground temperatures to support emissivity studies related to snow and ice cover.

Use Cases

• Validating satellite-based microwave snowfall retrieval algorithms by providing coincident ground truth imagery.
• Mapping snow cover extent and lake ice cover for surface emissivity modeling studies.
• Analyzing the relationship between visible surface conditions and coincident aircraft navigation and ground temperature data.

Strengths

• Data is precisely geo-located, enabling direct spatial correlation with other remote sensing observations.
• Imagery is from a controlled, clear-air flight day (February 20, 2012) designed for validation purposes.
• Includes ancillary aircraft navigation and ground temperature data to support reproducible emissivity analysis.

Limitations

• Extremely limited temporal coverage, containing data from only a single day.
• Conflicting metadata: one source lists a last update date of 2026-03 13, while another lists the data date of 2012-02-20 as the last update.
• Specific column names, file sizes, and total image counts are not provided in any source description.

Provenance

Source

GHRC_DAAC (Global Hydrology Resource Center Distributed Active Archive Center)

Collection Method

Collected from a nadir camera aboard the NASA DC-8 aircraft during the GCPEx field campaign.

Time Range

2012-02-20

Freshness

2026-03-13 02:05:28.627370

Geography

Canada (specific regions flown during the GCPEx campaign)