In this work we present a comparison of the current SCIAMACHY and MERIS reflectance calibrations at wavelengths between 442 and 885 nm. For that purpose we, firstly, locate all the SCIAMACHY pixels within a given MERIS image and, secondly, we calculate the median and standard deviation of all the MERIS pixels (≈1000) within each SCIAMACHY pixel. Results show that SCIAMACHY underestimates the re...

This paper investigates the performance of MERIS reduced resolution data to monitor water quality parameters in the Berau estuary waters, Indonesia. Total Suspended Matter (TSM) and Chlorophyll-a (Chl-a) concentration were derived from MERIS data using three different algorithms for coastal waters: standard global processor (MERIS L2), C2R and FUB. The outcomes were compared to in situ measurem...

MERIS Level 2 surface reflectance products are now available to the scientific community. This paper demonstrates the production of MERIS-derived surface albedo and Nadir Bidirectional Reflectance Distribution Function (BRDF) adjusted reflectances by coupling the MERIS data with MODIS BRDF products. Initial efforts rely on the specification of surface anisotropy as provided by the global MODIS ...

This paper discusses the validation of the operational Medium Resolution Imaging Spectrometer (MERIS) land product which corresponds to the biophysical variable of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). The FAPAR value is currently and automatically estimated from MERIS data at reduced resolution and it can be computed using the full resolution using the same phys...

A new MERIS spectral calibration method is proposed exploiting the synergy between MERIS and SCIAMACHY ENVISAT instruments. Detailed method description and preliminary results are presented in this paper. In the O2 calibration mode MERIS is measuring atmospheric radiances in the 750-780 nm spectral range in order to verify the instrument ability to reproduce position and shape of O2 band-A abso...

The capabilities of the Envisat MEdium Resolution Imaging Spectrometer (MERIS) for monitoring water quality parameters of oligoto mesotrophic lakes in Austria and of Lake Garda in Italy are investigated within the project AO-164, “Environmental Research in the Eastern Alps”. From May to September 2003 field measurements and routine measurements from limnological stations are available parallel ...

The successful launch of MERIS in March 2002 has given a great opportunity to understand the changes of water colour with high temporal and spatial resolutions. In this study, potentials of MERIS sensor were investigated to describe variations of optically active substances of Lake Garda. The basin is located in the Italian sub-alpine lacustrine district, where several other lakes and rivers gi...

This paper describes a first application-oriented analysis of MERIS products for Suspended Particulate Matter (SPM) and Chlorophyll-a (CHL) concentration in Belgian coastal waters. Regional algorithms designed for Belgian waters have been implemented and compared with the standard MERIS products, termed Total Suspended Matter and Algal2 respectively. The standard and regional SPM products seem ...

Empirical band ratio algorithms for the estimation of colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) for Sea-viewing Wide Field-of-view Sensor (SeaWiFS), Moderate Resolution Imaging Spectroradiometer (MODIS) and MERIS ocean color sensors were assessed and developed for the northern Gulf of Mexico. Match-ups between in situ measurements of CDOM absorption coefficients...

RESUME In this study we have performed in situ optical characterisation of reef waters and adjacent ocean waters and substratum type and cover. Next we developed an inversion optimisation method to infer water column composition, bathymetry and per pixel unmixing of substratum type and/or cover using MERIS FR scenes. Based on sensitivity analysis of the forward optical model, MERIS is capable o...