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BELHARMONY: Consistency between Earth observing Sensors

In the face of limitations in revisit times and frequent cloud coverage, many land and water applications need to combine data from multiple medium or high-resolution sensors in order to build a time series.

In December 2017, the BELHARMONY research project started off with the aim to assess the consistency between recent high-resolution Earth Observation sensors, focusing on Proba-V (100m), Sentinel-2, Landsat-8 and DEIMOS-1.

As an example, the project addresses biases between the sensors in the early processing stages (i.e. level-1, top-of-atmosphere), using a series of calibration sites. To demonstrate, this Proba-V image shows a dry lakebed of the Railroad Valley Playa calibration site in Nevada, USA. The 100m image was acquired on 04 February 2018.

In addition, BELHARMONY examines the differences in the relative spectral response (for level-2 reflectance products) and the use of a common processing chain towards a set of derived land and water parameters (level-3 processing). To evaluate the impact of the harmonization measures, the project relies on Earth Observation and in-situ data collection over the network of urban, agricultural and coastal sites from the Belgian BELAIR network.

Nevada, USA

© ESA-BELSPO 2018, produced by VITO
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