Calibration and validation remain essential processes in establishing the reliability of Earth-observation products. They link sensor measurements to traceable reference standards and ensure that data from different missions can be compared and used consistently.
Organised by the European Space Agency (ESA), the VH-RODA workshop offers a forum in which the Cal/Val community reviews current approaches for radar, optical and atmospheric systems. This year’s edition included the intervention of GRASP CEO David Fuertes, dealing with:
• GRASP, an introduction to the algorithm synergistic capabilities to advance Cal/Val.
• GROSAT, an approach for synergetic retrieval from ground-based and satellite measurements surface characterization and validation.
https://www.grasp-earth.com/portfolio/grosat/
• ECAMS/GLADIS, two new projects advancing synergetic retrievals from different satellite observations.
https://www.grasp-earth.com/portfolio/ecams/
https://www.grasp-earth.com/portfolio/gladis/
• GAPMAP/EDAP+, an overview of the data assessment over the GAPMAP mission.
Participants were also able to attend a live demonstration of the ACTRIS-whitelisted AirPhoton IN102 integrating nephelometer, an instrument operated across more than 30 sites worldwide through the Spartan Network.
https://www.grasp-earth.com/wp-content/uploads/2025/08/IN102_datasheet.pdf
Further information on the VH-RODA workshop is available at:
https://earth.esa.int/eogateway/events/vh-roda
