[ARCHIVE] Baltic Sea, Ocean Colour Optics product (daily observation)

'''This product has been archived''' For operationnal and online products, please visit https://marine.copernicus.eu

'''Short description:'''

The Global Ocean Satellite monitoring and marine ecosystem study group (GOS) of the Italian National Research Council (CNR), in Rome, distributes the "Optics" products available over Baltic Sea. They are *RRSxxx : the fully normalised remote sensing reflectances at xxx nm (expressed in sr-1). The list of spectral values is 400, 412, 443, 490, 510, 560, 620, 665, 674, 681 and 709 nm for OLCI. *APH440: absorption due to phytoplankton at 440 nm. *ADG440: absorption due to gelbstoff and detrital material at 440 nm. *BBP510: the particulate back-scattering coefficient at 510 nm *KD490: diffuse attenuation coefficient at 490 nm

These datasets are available at 300m of resolution. The OLCI single sensor product is produced with the BAL_HZG_OLCI_v2 processing chain incorporating two complementary neural network approaches: the C2RCC (Case 2 Regional CoastColour) Atmospheric Correction with revised neural nets from May 2019 is applied to OLCI L1B data to retrieve the remote sensing reflectances (RRSxxx) ; then the OLCI Neural Network Swarm (ONNS) version 0.9 (2019) is applied as bio-geo-optical in-water algorithm to retrieve the vertical attenuation coefficient (KD490) and IOPs (APH440, ADG440, BBP510) as well as the additional Chlorophyll-a observation dataset available in the product OCEANCOLOUR_BAL_CHL_L3_NRT_OBSERVATIONS_009_049.

'''Processing information :'''

A one month rolling archive of daily products is daily updated one day after the satellite acquisition. The rolling archive products are replaced by consolidated products 31 days after satellite acquisition.

'''Description of observation methods/instruments :'''

The BAL_HZG_OLCI_v2 optics product is available starting 26 April 2016 and is based on OLCI L1B data. The datasets based on NASA MODIS/AQUA level1 data were retired in December 2019 and have been archived offline.

'''Quality /Accuracy / Calibration information :'''

The validation of the OC NRT Rrs product was conducted with in situ data collected at AERONET-OC stations. The other datasets were not validated due to the lack of matching in situ data. A detailed description of cal/val is given in CMEMS-OC-QUID-009-048-049 document available on the CMEMS web portal.

'''Suitability, Expected type of users / uses :'''

This product is meant for use for educational purposes and for the managing of the marine safety, marine resources, marine and coastal environment and for climate and seasonal studies.

'''Dataset names :'''

*dataset-oc-bal-opt-olci-l3-kd490_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs400_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs412_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs443_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs490_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs510_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs560_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs620_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs665_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs674_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs681_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-rrs709_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-bbp510_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-aph440_300m_daily-rt-v02 *dataset-oc-bal-opt-olci-l3-adg440_300m_daily-rt-v02

'''Files format:''' *CF-1.4 *INSPIRE compliant.

'''DOI (product) :'''
https://doi.org/10.48670/moi-00084