Dunhuang CEOS Calibration Site Instrumentation Data

Dunhuang, China, is one of eight instrumented sites in the CEOS LANDNET network for sensor calibration and validation. The site provides surface and atmospheric measurements to support traceable intercomparison of wide swath satellite sensors. Data collection and maintenance were initiated following a 2004 CEOS recommendation, with support from member agencies like USGS_LTA.

Use Cases

• Predict Top of Atmosphere (TOA) radiance using site characteristics and atmospheric measurements for sensor intercomparison.
• Validate radiometric gain for in-flight instruments using field campaign data from the instrumented site.
• Facilitate traceability and bias evaluation for future satellite instruments by analyzing harmonized site data.
• Support autonomous calibration by analyzing surface and atmospheric measurements from automated site operations.

Strengths

• One of eight CEOS Reference Test Sites providing standardized data for international efforts.
• Designed for continuous traceable calibration and validation to ensure a high level of accuracy for climate data products.
• Long-term vision includes full automation of sites for sustained measurement collection.

Limitations

• Specific row count, column details, and data formats are unknown from the description.
• The temporal coverage and update frequency of the site data are not specified.
• Only three of the eight instrumented sites were reported to be fully automated at the time of the description.

Provenance

Source

Committee on Earth Observing System (CEOS) Calibration and Validation subgroup, with data provision by member agencies.

Collection Method

Field campaigns at instrumented sites to obtain radiometric measurements, with a goal of transitioning to autonomous data collection.

Time Range

Activities initiated following a 2004 recommendation, with a planned two-year implementation and two-year maintenance period.

Geography

Dunhuang, China; part of a global network of eight CEOS instrumented sites.