PACE Data Access and Tools

Download Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) datasets and access tools to help you find, analyze, and visualize the data.

Product	Description/Use	Availability/Latency	Status
Calibrated Radiometry and Polarimetry
Spectral top-of-atmosphere radiances from OCI	Spectral radiance observed at the top of the atmosphere.	Level-1B: daily Level-1C: daily	Standard Product
Spectral top-of-atmosphere radiances and polarimetry from SPEXone	Spectral radiance and polarimetry observed at the top of the atmosphere, for all sensor viewing angles.	Level-1B: daily Level-1C: daily	Standard Product
Spectral top-of-atmosphere radiances and polarimetry from HARP2	Spectral radiance and polarimetry observed at the top of the atmosphere, for all sensor viewing angles.	Level-1B: daily Level-1C: daily	Standard Product
Ocean Properties to be Produced by OCI
Spectral remote sensing reflectances	Spectral color of the ocean in the ultraviolet-to-near infrared spectral range. Used as input into algorithms to retrieve information about colored dissolved organic matter, phytoplankton, non-algal particles, and other aquatic constituents. Provided in continuous 2.5-nm steps from 350 to 717.5-nm with a resolution (bandwidth) of 5-nm.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Apparent visible wavelength	An optical water classification index reported as the weighted harmonic mean of visible-range Rrs wavelengths (400-700 nm).	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Spectral diffuse attenuation coefficients	Spectral diffuse attenuation of downwelling irradiance at multiple wavelengths between 350 and 700 nm. Provides indices of water clarity and light penetration.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Spectral phytoplankton absorption coefficients	Spectral absorption coefficients for total phytoplankton absorption at multiple wavelengths between 350 and 700-nm. Provides information on phytoplankton physiology, abundance, and community composition.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Spectral non-algal particle plus dissolved organic matter absorption coefficients	Spectral absorption coefficients for non-algal particulates and dissolved organic matter at multiple wavelengths between 350 and 700-nm. Provides information on the concentrations of the dissolved component of organic carbon and the detrital (non-algal) component of the particulate assembly.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Spectral chromophoric dissolved organic matter absorption coefficients	Spectral absorption coefficients for dissolved organic matter at multiple wavelengths between 350 and 700-nm. Provides information on the concentration of the dissolved component of organic carbon.	TBD	Test
Spectral slope coefficients of chromophoric dissolved organic matter absorption	Absorption spectral slope coefficients of chromophoric dissolved organic matter for multiple wavelength ranges: 275-295, 350-400, 380-600 nm. Provides information on the contribution of land-derived dissolved organic matter, relative contribution of land- versus marine-derived dissolved organic matter, and as a relative measure of solar photobleaching.	TBD	Test
Spectral non-algal particle matter absorption coefficients	Spectral absorption coefficients for non-algal particulate matter at multiple wavelengths between 350 and 700 nm. Provides information on the concentration of non-phytoplankton particulate components.	TBD	Test
Spectral particlulate matter absorption coefficients	Spectral absorption coefficients for particulate matter at multiple wavelengths between 350 and 700 nm. Provides information on the concentration of particulate matter in the water column.	TBD	Test
Spectral particle backscattering coefficients	Spectral backscattering of the light associated with particulate material, at multiple wavelengths between 350-700 nm. Provides an indicator of the concentration of particules in the ocean and a proxy indicator of particulate carbon concentrations.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Fluorescence line height	Light leaving the surface ocean due to the sun induced chlorophyll fluorescence. Provides an indicator of phytoplankton physiology (health?).	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Daily photosynthetically available radiation (PAR)	The amount of sunlight that is useful for photosynthesis, defined here as the 400-700 nm spectral range, that reaches the surface of the ocean over a day. As phytoplankton require light to convert inorganic carbon to organic carbon, PAR provides a critical parameter for understanding the oceanic carbon cycle.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Instantaneous photosynthetically available radiation (iPAR)	The amount of sunlight that is useful for photosynthesis, defined here as the 400-700 nm spectral range, that reaches the surface of the ocean at the moment of satellite data collection. As phytoplankton require light to convert inorganic carbon to organic carbon, iPAR provides a critical parameter for understanding the oceanic carbon cycle.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Concentration of chlorophyll-a	Near surface concentration of the photosynthetic pigment chlorophyll-a. Provides proxies for algal biomass, ecosystem health and function, and eutrophication.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Phytoplankton pigment concentrations	Concentration of specific photosynthetic pigments in the surface ocean. As different phytoplankton taxa contain their own specific pigment suites, these concentrations provide indicators of presence and abundance of specific types of phytoplankton in the ocean (e.g. harmful algal blooms).	TBD	Test
Net primary production (NPP)	Rate of conversion of dissolved carbon dioxide to organic carbon through photosysthesis minus the carbon used for respiration. NPP is an important part of the carbon cycle and these products are used in local models (estimating food avaliable to fish populations) all the way up to global climate and Earth System models (to predict information about the oceans of today and tomorrow).	TBD	Test
Phytoplankton community composition	Descriptors of the composition of phytoplankton populations. Different approaches describe these populations in different ways, such as by carbon content or biovolume per class (e.g., diatom contributions vs. cyanobacteria contributions), particle size distributions (or fraction of large cells vs. small cells), or targeted identification of a single class (e.g., detection of a harmful cyanobacteria algal bloom).	TBD	Test
Concentration of particulate organic carbon	Near surface concentration of the particulate organic carbon. It is a proxy for all living material (phytoplankton, zooplankton, bacteria) and detritus. It is also a venue through which organic carbon, sequestered through the photosynthesis, is transferred towards higher trophic levels and into the deep ocean.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Concentration of particulate inorganic carbon	Concentration of particulate inorganic carbon in the surface of the ocean. Used to track the presence and abundance of calcite containing phytoplankton in the open ocean (coccolithophores).	Level-2: daily Level-3: daily, 8-day, monthly, annual	Standard Product
Concentration of phytoplankton carbon	Concentration of carbon contained in phytoplankton cells. Provides a proxy for phytoplankton biomass that is often used in primary productivity algorithms and biogeochemical and Earth System models.	Level-2: daily Level-3: daily, 8-day, monthly, annual	Provisional
Concentration of dissolved organic carbon	Near surface concentration of dissolved organic carbon. It is exported into coastal waters from land through rivers and groundwater. In the aquatic environment, it is produced or released by all living material (phytoplankton, zooplankton, bacteria) and detritus. It is a source of energy for bacteria and other microbial organisms and is transferred to higher trophic levels. It typically comprises well over 95% of the organic carbon in the ocean.	TBD	Test
Suspended particulate matter	Near surface concentration of particles both living (phytoplankton, zooplankton, bacteria) and non-living (detritus, sediments).	TBD	Test
Atmospheric Properties to be Produced by OCI
Spectral aerosol optical depth	Spectral measurement of the extinction of the solar beam caused by atmospheric aerosol particles, such as dust and haze, at 380, 440, 500, 550, and 675 nm (and potentially additional wavelengths) over land and oceans. Provides information on the concentration of aerosols in a vertical column of atmosphere.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Aerosol fine mode fraction (over ocean)	Fraction of visible aerosol optical depth from fine mode aerosols over oceans at 550 nm.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Cloud mask	Provides information on whether or not a given pixel is covered by cloud. This is an input to many downstream algorithms, as most process either only cloudy or only cloud-free scenes, and is also useful for climate research.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Cloud phase	Provides information on whether a given cloudy pixel is composed of liquid-phase or ice-phase clouds. Used as an input to downstream processing to inform optical model choices, as well as for climate research.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Cloud top pressure of opaque clouds	Atmospheric pressure at the height of the cloud top. Useful for climate research and in L1c reaggregation.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Optical thickness of liquid and ice clouds	Measurement of extinction of the solar beam due to clouds in the mid-visible wavelength. Used for climate studies.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Effective radius of liquid and ice clouds	Ratio of the third to second moments of the cloud droplet size distribution, as an indicator of cloud particle size. Used for climate studies.	Level-2: daily Level-3: daily, 8-day, month	Standard Product
Water path of liquid and ice clouds	Mass of (liquid or ice) water in clouds in the vertical column. Used for climate studies.	Level-2: daily Level-3: daily, 8-day, monthly	Standard Product
Shortwave radiation effect	Reflected solar flux (spectral and directional integral of reflected sunlight).	Level-2: daily Level-3: daily, monthly	Standard Product
Land Data Products to be Produced by OCI
Surface reflectance	Effective reflectance of the Earth's surface as observed by OCI. Used as an input to downstream land data products.	TBD	Test
BRDF/albedo and model parameters	Describes the spectral and directional dependence of surface reflectance.	TBD	Test
Normalized difference vegetation index (NDVI)	Empirical metric related to vegetation abundance and health, corrected for atmospheric scattering and absorption.	TBD	Test
Enhanced vegetation index (EVI)	Empirical metric related to vegetation abundance and health, similar to NDVI, with additional resistance to atmospheric effects and sensitivity in densely vegetated regions.	TBD	Test
Photochemical reflectance index (PRI)	Hyperspectral vegetation index designed to capture subtle shifts in carotenoids and provides information on stress in plants	TBD	Test
Aerosol and Ocean Properties from HARP2
Spectral aerosol optical depth	Spectral measurement of the extinction of the solar beam caused by atmospheric aerosol particles. Provides information on the concentration of aerosols in a vertical column of atmosphere. May be represented separately for different aerosol size/type modes.	TBD	Test
Aerosol size distribution	Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins.	TBD	Test
Aerosol complex refractive index	Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption.	TBD	Test
Aerosol layer height	Parameterization of aerosol vertical distribution.	TBD	Test
Aerosol shape, fraction spherical	Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids.	TBD	Test
Spectral remote sensing reflectances	Spectral color of the ocean in the visible spectral range. Used to evaluate performance of atmospheric correction based on aerosol properties retrieved from polarimeters, faciliate synergy with other instruments.	TBD	Test
Aerosol single scattering albedo	Ratio of aerosol scattering to extinction.	TBD	Test
Ocean surface roughness	Surface roughness defines the directionality of the solar specular reflectance (sunglint), often parameterized by wind speed and direction.	TBD	Test
Ocean body properties	In water optical properties that define the water leaving radiance. Parameterization schemes may be simple or complex, the validity of which depend on ocean conditions.	TBD	Test
Aerosol and Land Surface Properties from HARP2
Spectral aerosol optical depth	Spectral measurement of the extinction of the solar beam caused by atmospheric aerosol particles. Provides information on the concentration of aerosols in a vertical column of atmosphere. May be represented separately for different aerosol size/type modes.	TBD	Test
Aerosol number concentration	Number of aerosols present within a defined volume or area.	TBD	Test
Aerosol size distribution	Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins.	TBD	Test
Aerosol complex refractive index	Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption.	TBD	Test
Aerosol layer height	Parameterization of aerosol vertical distribution.	TBD	Test
Aerosol shape, fraction spherical	Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids.	TBD	Test
Aerosol single scattering albedo	Ratio of aerosol scattering to extinction.	TBD	Test
Spectrally resolved land surface Bidirectional Reflectance Distribution Function (BRDF)	Defines the reflectance as a function of illumination and observation characteristics. Often represented as a modal sum of angular distribution kernels.	TBD	Test
Spectrally resolved land surface Bidirectional Polarized Distribution Function (BPDF)	Defines the surface polarization as a function of illumination and observation characteristics.	TBD	Test
Cloud Properties from HARP2
Cloud detection	Cloud identification, either as binary flag, percentage or other metric.	TBD	Test
Cloud physical thickness	Distance between cloud base and cloud top.	TBD	Test
Cloud top height	Altitude of cloud top.	TBD	Test
Cloud top phase	Determination of liquid or ice phase cloud.	TBD	Test
Cloud optical depth	Synonymous with cloud optical thickness.	TBD	Test
Liquid cloud droplet effective radius and effective variance	A microphysical property describing droplet size distribution and distribution width.	TBD	Test
Ice particle shape and asymmetry parameter	Parameterization of shape is relevant for radiative transfer modeling.	TBD	Test
Liquid water path	Can be derived from measures of optical depth and droplet size distribution.	TBD	Test
3D cloud field	3D reconstruction of cloud vertical and horizontal distribution using multi-angle polarimetry.	TBD	Test
Ocean Surface Properties from HARP2
Aerosol optical depth in the near infrared	Byproduct of the primary algorithm.	TBD	Test
Ocean surface refractive index	Indication of non-seawater substances on the ocean surface, such as oil.	TBD	Test
Aerosol and Ocean Properties from SPEXone
Spectral aerosol optical depth	Spectral measurement of the extinction of the solar beam caused by atmospheric aerosol particles. Provides information on the concentration of aerosols in a vertical column of atmosphere. May be represented separately for different aerosol size/type modes.	TBD	Test
Aerosol size distribution	Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins.	TBD	Test
Aerosol complex refractive index	Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption.	TBD	Test
Aerosol layer height	Parameterization of aerosol vertical distribution.	TBD	Test
Aerosol shape, fraction spherical	Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids.	TBD	Test
Aerosol single scattering albedo	Ratio of aerosol scattering to extinction.	TBD	Test
Ocean surface roughness	Surface roughness defines the directionality of the solar specular reflectance (sunglint), often parameterized by wind speed and direction.	TBD	Test
Ocean body properties	In water optical properties that define the water leaving radiance. Parameterization schemes may be simple or complex, the validity of which depend on ocean conditions.	TBD	Test
Aerosol and Land Surface Properties from SPEXone
Spectral aerosol optical depth	Spectral measurement of the extinction of the solar beam caused by atmospheric aerosol particles. Provides information on the concentration of aerosols in a vertical column of atmosphere. May be represented separately for different aerosol size/type modes.	TBD	Test
Aerosol number concentration	Number of aerosols present within a defined volume or area.	TBD	Test
Aerosol size distribution	Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins.	TBD	Test
Aerosol complex refractive index	Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption.	TBD	Test
Aerosol layer height	Parameterization of aerosol vertical distribution.	TBD	Test
Aerosol shape, fraction spherical	Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids.	TBD	Test
Aerosol single scattering albedo	Ratio of aerosol scattering to extinction.	TBD	Test
Spectrally resolved land surface Bidirectional Reflectance Distribution Function (BRDF)	Defines the reflectance as a function of illumination and observation characteristics. Often represented as a modal sum of angular distribution kernels.	TBD	Test
Spectrally resolved land surface Bidirectional Polarized Distribution Function (BPDF)	Defines the surface polarization as a function of illumination and observation characteristics.	TBD	Test
Aerosol and Ocean Properties from OCI + HARP2 + SPEXone
Spectral aerosol optical depth	Spectral measurement of the extinction of the solar beam caused by atmospheric aerosol particles. Provides information on the concentration of aerosols in a vertical column of atmosphere. May be represented separately for different aerosol size/type modes.	TBD	Test
Aerosol size distribution	Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins.	TBD	Test
Aerosol complex refractive index	Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption.	TBD	Test
Aerosol layer height	Parameterization of aerosol vertical distribution.	TBD	Test
Aerosol shape, fraction spherical	Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids.	TBD	Test
Aerosol scattering phase matrix	Defined by above parameters, this describes the angular distribution of scattering and polarization.	TBD	Test
Aerosol single scattering albedo	Ratio of aerosol scattering to extinction.	TBD	Test
Spectral remote sensing reflectances	Spectral color of the ocean in the visible spectral range. Used to evaluate performance of atmospheric correction based on aerosol properties retrieved from polarimeters, faciliate synergy with other instruments	TBD	Test
Ocean surface roughness	Surface roughness defines the directionality of the solar specular reflectance (sunglint), often parameterized by wind speed and direction.	TBD	Test
Ocean body properties	In water optical properties that define the water leaving radiance. Parameterization schemes may be simple or complex, the validity of which depend on ocean conditions.	TBD	Test
Thin cloud contamination	Some algorithms may detect the presence of optically thin clouds (usually cirrus) that would otherwise adversely affect the retrieval of other parameters.	TBD	Test

Datasets

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Dataset	Instruments	Temporal Extent	Spatial Extent	Version	Data State	Data Format	Related Topics
PACE HARP2 Level-1B Acquisition Scheme Type 4 - Science Mode Data, version 3	HARP2	2024-02-22 to Present	N: 90 S: -90 E: 180 W: -180	3	ACTIVE	netCDF-4	Ocean Color
PACE SPEXone Level-2 Regional Aerosol Over Ocean Optical Properties, FastMAPOL Algorithm - Near Real-time (NRT) Data, version 3.0	SPEXone	2024-02-25 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Aerosol Particle Properties
PACE SPEXone Level-3 Global Ocean Properties, RemoTAP Algorithm - Near Real-time (NRT) Data, version 3.0	SPEXone	2024-02-05 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Ocean Color
PACE HARP2 Level-1C Science Data, version 3	HARP2	2024-02-22 to Present	N: 90 S: -90 E: 180 W: -180	3	ACTIVE	netCDF-4	Ocean Color, Aerosol Particle Properties
PACE SPEXone Level-2 Regional Aerosol Optical Properties Over Ocean, RemoTAP Algorithm - Near Real-time (NRT) Data, version 3.0	SPEXone	2024-02-25 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Ocean Color
PACE SPEXone Level-3 Global Land Properties, RemoTAP Algorithm - Near Real-time (NRT) Data, version 3.0	SPEXone	2024-02-05 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Ocean Color
PACE SPEXone Level-3 Global Aerosol Optical Properties, RemoTAP Algorithm - Near Real-time (NRT) Data, version 3.0	SPEXone	2024-02-05 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Ocean Color
PACE HARP2 Level-1B Science Data, version 3	HARP2	2024-02-22 to Present	N: 90 S: -90 E: 180 W: -180	3	ACTIVE	netCDF-4	Ocean Color, Aerosol Particle Properties
PACE SPEXone Level-2 Regional Aerosol Optical Properties Over Land, RemoTAP Algorithm - Near Real-time (NRT) Data, version 3.0	SPEXone	2024-02-25 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Ocean Color
PACE SPEXone Level-3 Global Aerosol Optical Properties, RemoTAP Algorithm Data, version 3.0	SPEXone	2024-02-05 to Present	N: 90 S: -90 E: 180 W: -180	3.0	ACTIVE	netCDF-4	Ocean Color

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PACE Data Tools

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Tool Sort descending	Description	Services
Worldview	Worldview offers the capability to interactively browse over 1,200 global, full-resolution satellite imagery layers and download the underlying data.	Analysis, Search and Discovery, Visualization, Access, Comparison, Monitoring Natural Events

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