Abbrevations

Abbrevation	Definition	Additional information
AVHRR	Advanced Very-High-Resolution Radiometer	Thermal instrument of NOAA satellite series (1km).
BC	Brockmann Consult Oy	One of the partner companies of Syke, which specialises in Earth Observation solutions.
BEAM	BEAM software	The software used to process satellite images. No longer in use; replaced by the SNAP software.
C2RCC	Case 2 Regional Coast Colour	A bio-optical model which can interpret i.e. absorption of chlorophyll-a, suspended solids, and CDOM.
C2R	Case 2 Regional	A bio-optical model which can interpret i.e. absorption of chlorophyll-a, suspended solids, and humus. Specifically adapted to Case-2 type water formations. Previous version of C2RCC:stä, which is currently used.
C2X	Case 2 Extreme	A bio-optical model developed specifically to operate in extreme aquatic environments, such as areas with high levels of CDOM content.
CDOM	Colored dissolved organic matter	Unit 1/m.
Chl-a	Chlorophyll-a concentration	Unit μg/L or mg/m³.
EO	Earth Observation	The usage of remote sensing technologies (satellites) to monitor land, marine and atmosphere.
ESA	European Space Agency	European Space Agency.
FSC	Fractional Snow Cover	Percentage of landcover (0 % – 100 %).
FUB	Freie University of Berlin	A bio-optical model which can interpret i.e. absorption of chlorophyll-a, suspended solids, and humus. In Syke, the MERIS instrument is used for chlorophyll-a interpretation.
HR	High Resolution	High spatial resolution (In Tarkka-service 10 m – 30 m).
Idepix	multi-sensor pixel identification tool	A cloud detection tool commonly used for identifying cloudy areas by various satellite instruments (radiometers).
LC8	Landsat-8	The 8th version of the NASA and USGS Landsat satellite series which includes OLI (Operational Land Imager) and TIRS (Thermal Infrared Sensor) instruments, with a spatial resolution ranging from 30 meters to 100 meters.
LIE	Lake Ice Extent	The occurrence of lake ice is described using a classification scale that may include information about the snow cover on the ice.
MERIS	MEdium Resolution Imaging Spectrometer	The mid-resolution instrument of the ESA Envisat satellite series (up to 2012).
MODIS	MOderate Resolution Imaging Spectrometer	The mid-resolution instrument of NASA’s Terra and Aqua satellites.
MR	Medium Resolution	Medium spatial resolution (In Tarkka-service 300 m – 1 km).
MS	Monitoring Station	Stations from which in-situ observations are made.
MSI	MultiSpectral Instrument	The high-resolution instrument of the Copernicus program’s S2 satellite series, with a resolution ranging from 10 meters to 60 meters.
NASA	National Aeronautics and Space Administration	The United States’ space agency.
OLCI	Ocean and Land Colour Instrument	The optical mid-resolution instrument of the Sentinel-3 satellite series has a resolution of 300 meters.
OLI	Operational Land Imager	The optical instrument of the Landsat satellite series.
RGB	Red Green Blue	A color model which true-color images are built upon. Provides a wide range of colors visible to the human eye. What is a true-color image
SDT	Secchi Depth	Unit metre
SLSTR	The Sea and Land Surface Temperature Radiometer	The thermal instrument of the Sentinel-3 satellite series (1 km).
SNAP	Sentinel Application Platform	A ESA software that brings together tools for processing satellite images.
SST	Sea surface temperature	Unit °C (celsius) or K (kelvin).
S2	Sentinel-2	The satellite series of the Copernicus program with the high-resolution instrument MSI (10 m – 60 m).
S3	Sentinel-3	The satellite series of the Copernicus program with the medium-resolution instruments OLCI and SLSTR (300 m – 1 km).
TIRS	The thermal instrument of the Landsat satellite series (100).
TURB	Turbidity	Yksikkö FNU.
VPD/WFD	Water Framework Directive (Vesipuitedirektiivi)	The directive from the European Parliament and the Council concerning the framework for water policy. In Tarkka service it refers to the monitoring areas (water bodies) defined by the directive in Finland.