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Description

The Ocean and Land Colour Instrument (OLCI) is the successor to ENVISAT's Medium Resolution Imaging Spectrometer (MERIS) having additional spectral channels, different camera arrangements and simplified on-board processing. The OLCI is a push-broom instrument with five camera modules sharing the field of view. The field of view of the five cameras is arranged in a fan-shaped configuration in the vertical plane, perpendicular to the platform velocity. Each camera has an individual field of view of 14.2° and a 0.6° overlap with its neighbors. The whole field of view is shifted across track by 12.6° away from the sun to minimize the impact of sun glint. OLCI is equipped with on-board calibration hardware based on sun diffusers. There are three sun diffusers--two 'white' diffusers dedicated to radiometric calibration and one dedicated to spectral calibration, with spectral reflectance features. The native resolution is approximately 300m, refered to as Full Resolution (FR). A Reduced Resolution (RR) processing mode provides Level-1B data at sampling rates decreased by a factor of four in both spatial dimensions resulting to resolution of approximately 1.2 km.

Version Description

Reprocessing of Ocean Color (OC) Datasets

Product Summary

Platforms
Sentinel-3B
Instruments
OLCI
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2018-05-14 to Present
Data Partner
Ocean Biology Processing Group (OBPG) ,
Ocean Biology Distributed Active Archive Center (OB.DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/GCDC/OB.DAAC)
Concept ID
C3407754995-OB_CLOUD
Data State
ACTIVE
Number of Files/Granules
39081
Processing Level
2
Published
Updated
Science Keywords
Reflectance ,
Top of Atmosphere (TOA) Refelctance

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

NASA Ocean Biology Processing Group. (2025). Sentinel-3B OLCI Level-2 Regional Earth-observation Full Resolution (ERR) Inherent Optical Properties (IOP) Data, version 2022.0 [Data set]. NASA Ocean Biology Distributed Active Archive Center. https://doi.org/10.5067/S3B/OLCI/L2/ERR/IOP/2022.0 Date Accessed: 2025-12-25

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
geophysical_data/adg_443 Absorption due to gelbstoff and detrital material at 443 nm, GIOP model m^-1 int16 -32767 -30000 to 25000 9.9999997473788E-5
geophysical_data/adg_s detrital and gelbstoff absorption spectral parameter for GIOP model m^-1 nm^-1 float32 -32767 0 to 5 N/A
geophysical_data/adg_unc_443 Uncertainty in absorption due to gelbstoff and detrital material at 443 nm, GIOP model m^-1 int16 -32767 -24999 to 25000 9.9999997473788E-5
geophysical_data/aph_443 Absorption due to phytoplankton at 443 nm, GIOP model m^-1 int16 -32767 -24999 to 25000 9.9999997473788E-5
geophysical_data/aph_unc_443 Uncertainty in absorption due to phytoplankton at 443 nm, GIOP model m^-1 int16 -32767 -24999 to 25000 9.9999997473788E-5
geophysical_data/a_400 Total absorption at 400 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_412 Total absorption at 412 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_443 Total absorption at 443 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_490 Total absorption at 490 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_510 Total absorption at 510 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_560 Total absorption at 560 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_620 Total absorption at 620 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_665 Total absorption at 665 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_674 Total absorption at 674 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_681 Total absorption at 681 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/a_709 Total absorption at 709 nm, GIOP model m^-1 int16 -32767 -24999 to 32000 9.9999997473788E-5
geophysical_data/bbp_443 Particulate backscattering at 443 nm, GIOP model m^-1 int16 -32767 -27999 to 2000 4.9999998736894E-6
geophysical_data/bbp_s backscattering spectral parameter for GIOP model m^-1 nm^-1 float32 -32767 -3 to 3 N/A
geophysical_data/bbp_unc_443 Uncertainty in particulate backscatter at 443 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_400 Total backscattering at 400 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_412 Total backscattering at 412 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_443 Total backscattering at 443 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_490 Total backscattering at 490 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_510 Total backscattering at 510 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_560 Total backscattering at 560 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_620 Total backscattering at 620 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_665 Total backscattering at 665 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_674 Total backscattering at 674 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_681 Total backscattering at 681 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/bb_709 Total backscattering at 709 nm, GIOP model m^-1 int16 -32767 -27999 to 32000 4.9999998736894E-6
geophysical_data/l2_flags Level-2 Processing Flags N/A int32 N/A -2147483648 to 2147483647 N/A
geophysical_data/rrsdiff Fractional mean Rrs difference, GIOP model N/A float32 -32767 N/A N/A
navigation_data/latitude Latitude degrees_north float32 -999 -90 to 90 N/A
navigation_data/longitude Longitude degrees_east float32 -999 -180 to 180 N/A
navigation_data/tilt Sensor tilt angle degree float32 -32767 -25 to 25 N/A
scan_line_attributes/clat Center Latitude degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/clon Center Longitude degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/csol_z Center Solar Zenith Angle degree float32 -999 -90 to 90 N/A
scan_line_attributes/day Scan day of year days int32 -32767 0 to 366 N/A
scan_line_attributes/detnum Detector Number (zero-based) N/A int8 -1 0 to 25 N/A
scan_line_attributes/elat Ending Latitude degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/elon Ending Longitude degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/msec Scan time, milliseconds of day milliseconds int32 -32767 0 to 86400000 N/A
scan_line_attributes/mside Mirror Side (zero-based) N/A int8 -1 0 to 1 N/A
scan_line_attributes/slat Starting Latitude degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/slon Starting Longitude degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/time scan line time in seconds since 1970-1-1 seconds since 1970-1-1 float64 -32767 N/A N/A
scan_line_attributes/year Scan year years int32 -32767 1900 to 2100 N/A
sensor_band_parameters/aw Band-pass averaged absorption coefficient for seawater m^-1 float32 -32767 9.9999997473788E-5 to 5 N/A
sensor_band_parameters/bbw Band-pass averaged backscattering coefficient for seawater m^-1 float32 -32767 4.9999998736894E-6 to 1 N/A
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