OLCI-A/B tandem phase: evaluation of FLuorescence EXplorer (FLEX)-like radiances and estimation of systematic differences between OLCI-A and OLCI-FLEX

Jänicke, Lena Katharina; Preusker, Rene; Celesti, Marco; Tudoroiu, Marin; Fischer, Jürgen; Schüttemeyer, Dirk; Drusch, Matthias

doi:https://doi.org/10.5194/amt-16-3101-2023

Articles | Volume 16, issue 12

https://doi.org/10.5194/amt-16-3101-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-16-3101-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 12

Research article

|

23 Jun 2023

Research article |

| 23 Jun 2023

OLCI-A/B tandem phase: evaluation of FLuorescence EXplorer (FLEX)-like radiances and estimation of systematic differences between OLCI-A and OLCI-FLEX

Lena Katharina Jänicke, Rene Preusker, Marco Celesti, Marin Tudoroiu, Jürgen Fischer, Dirk Schüttemeyer, and Matthias Drusch

Data sets

S-3 OLCI Tandem 2018 European Space Agency https://doi.org/10.5270/ESA-624426c

Short summary

To compare two top-of-atmosphere radiances measured by instruments with different spectral characteristics, a transfer function has been developed. It is applied to a tandem data set of Sentinel-3A and B, for which OLCI-B mimicked the ESA’s eighth Earth Explorer FLEX. We found that OLCI-A measured radiances about 2 % brighter than OLCI-FLEX. Only at larger wavelengths were OLCI-A measurements about 5 % darker. The method is thus successful, being sensitive to calibration and processing issues.