QA4SM/FRM4SM

QA4SM is a free, online tool for validating soil moisture (SM) data, offering best-practice methods, full traceability, and repeatability for scientific studies. It evaluates satellite-derived SM datasets against in situ measuremets (ISMN) for representativeness, quality, and suitability for specific applications, addressing errors from sensors, algorithms, or environmental factors. QA4SM compares datasets against a reference using metrics like bias and correlation, adapting to evolving validation practices and data needs. It ensures traceability by tracking dataset versions, algorithms, and changes, with reproducible results archived on Zenodo. QA4SM is open-source, accessible on GitHub, but data usage depends on providers' restrictions. It facilitates reliable, standardized SM validation globally.

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