Skip to main content

Description

The Ocean Color (OC) data suite provides calibrated, atmospherically corrected ocean-optics measurements and derived biogeophysical products. This data suite includes the Apparent Optical Properties (AOP) and provides satellite-derived measures of the interaction between solar radiation and the upper ocean. AOPs are ?~@~\apparent?~@~] because they depend not only on the inherent optical properties (IOPs) of seawater and its constituents but also on the ambient light field. These variables are critical for studying light penetration, primary productivity, and biogeochemical cycling.

This activity was informed by the Satellite Needs Working Group (SNWG), an interagency effort of the U.S. Government dedicated to identifying and addressing Earth observation needs across U.S. civilian federal agencies.

Geophysical variables in this suite include:
?~@? Kd_490 - Diffuse attenuation coefficient at 490 nm, KD2 algorithm (m?~A?¹)
?~@? Rrs - Remote sensing reflectance (sr?~A?¹)
?~@? angstrom - Aerosol Angstrom exponent, 443 to 865 nm
?~@? chlor_a - Chlorophyll Concentration, OCI Algorithm (mg m?~A?³)
?~@? l2_flags - Level-2 Processing Flags

?~@? aot_865 - Aerosol optical thickness at 865 nm
?~@? l2_flags - Level-2 Processing Flags

Product Summary

Platforms
Sentinel-3A
Instruments
OLCI
Spatial Extent

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

Location
GLOBAL OCEAN
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2016-04-05 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
C3406446207-OB_CLOUD
Data State
ACTIVE
Number of Files/Granules
76538
Processing Level
2
Published
Updated
Science Keywords
Ocean Color ,
Reflectance ,
Aerosol Optical Depth/Thickness ,
Angstrom Exponent ,
Chlorophyll Concentration ,
Attenuation/Transmission ,
Organic Carbon ,
Inorganic Carbon ,
Fluorescence ,
Photosynthetically Active Radiation

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
geophysical_data/angstrom Aerosol Angstrom exponent, 443 to 865 nm N/A int16 -32767 -30000 to 5000 9.9999997473788E-5
geophysical_data/aot_865 Aerosol optical thickness at 865 nm N/A int16 -32767 0 to 30000 9.9999997473788E-5
geophysical_data/chlor_a Chlorophyll Concentration, OCI Algorithm mg m^-3 float32 -32767 0.0010000000474975 to 100 N/A
geophysical_data/Kd_490 Diffuse attenuation coefficient at 490 nm, KD2 algorithm m^-1 int16 -32767 50 to 30000 0.00019999999494758
geophysical_data/l2_flags Level-2 Processing Flags N/A int32 N/A -2147483648 to 2147483647 N/A
geophysical_data/Rrs_400 Remote sensing reflectance at 400 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_412 Remote sensing reflectance at 412 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_443 Remote sensing reflectance at 443 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_490 Remote sensing reflectance at 490 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_510 Remote sensing reflectance at 510 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_560 Remote sensing reflectance at 560 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_620 Remote sensing reflectance at 620 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_665 Remote sensing reflectance at 665 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_674 Remote sensing reflectance at 674 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_681 Remote sensing reflectance at 681 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_709 Remote sensing reflectance at 709 nm sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
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
sensor_band_parameters/F0 Mean Solar Flux W m^-2 um^-1 float32 -32767 0 to 2500 N/A
sensor_band_parameters/k_no2 NO2 Absorption cross-sections cm^2 molecule^-1 float32 -32767 0 to 0.10000000149012 N/A
sensor_band_parameters/k_oz Ozone Absorption cross-sections cm^-1 float32 -32767 0 to 0.10000000149012 N/A
sensor_band_parameters/Tau_r Rayleigh Optical Thickness N/A float32 -32767 0 to 0.5 N/A
sensor_band_parameters/vcal_gain Vicarious Calibration Gain N/A float32 -32767 0 to 2 N/A
sensor_band_parameters/vcal_offset Vicarious Calibration Offset mW cm^-2 um^-1 sr^-1 float32 -32767 0 to 10 N/A
sensor_band_parameters/wavelength wavelengths nm int32 -32767 0 to 20000 N/A
You're viewing 41 of 41