Data Products Table
Calibrated Radiometry and Polarimetry | Aquatic Properties to be Produced by OCI | Atmospheric Properties to be Produced by OCI | Land Data Products to be Produced by OCI | Aerosol and Ocean Properties from HARP2 | Aerosol and Land Surface Properties from HARP2 | Cloud Properties from HARP2 | Aerosol, Ocean, and Land Properties from SPEXone | Aerosol and Ocean Properties from OCI + HARP2 + SPEXone
Points of contact (POCs) under Additional Info refer to the PACE Project Science Lead responsible for shepherding an approach through implementation.
Access to data varies with its status (data maturity level). Provisional data are available through Earthdata Search, the OB.DAAC File Search and Level 3 & 4 Browser. Test and Diagnostic data are available through the OB.DAAC File Search and Level 3 & 4 Browser. See also “Access PACE Data”.
| Calibrated Radiometry and Polarimetry Calibrated and geolocated radiometry and polarimetry as observed at sensor. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| Spectral top-of-atmosphere radiances from OCI | N/A | Spectral radiance observed at the top of the atmosphere. | W m-2 um-1 sr-1 | Level-1B 1.2-km native; daily - Level-1C; 5.2-km; daily | Provisional | Level-1C draft data format and examples |
| Spectral top-of-atmosphere radiances and polarimetry from SPEXone | N/A | Spectral radiance and polarimetry observed at the top of the atmosphere, for all sensor viewing angles. | Various | Level-1B 5.2-km; daily - Level-1C; 5.2-km; daily | Provisional | Level-1C draft data format and examples |
| Spectral top-of-atmosphere radiances and polarimetry from HARP2 | N/A | Spectral radiance and polarimetry observed at the top of the atmosphere, for all sensor viewing angles. | Various | Level-1B 5.2-km; daily - Level-1C; 5.2-km; daily | Provisional | Level-1C draft data format and examples |
| Aquatic Properties to be Produced by OCI Bio-optical and biogeochemical properties of seawater constituents in the sunlit upper ocean. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| Spectral remote sensing reflectances | OC_AOP | 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 and 1.25 nm steps between 640 to 715 nm with a resolution (bandwidth) of 5-nm. | sr-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Amir Ibrahim In situ measurement protocols |
| Surface reflectance | SFREFL | Effective reflectance of the Earth's surface as observed by OCI. Used as an input to downstream ocean data products. Includes inland waters as well as ocean surface reflectance. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Apparent visible wavelength | OC_AOP | An optical water classification index reported as the weighted harmonic mean of visible-range Rrs wavelengths (400-700 nm) | nm | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Ivona Cetinić |
| Spectral diffuse attenuation coefficients | OC_IOP | Spectral diffuse attenuation of downwelling irradiance at multiple wavelengths between 350 and 700 nm. Provides indices of water clarity and light penetration. | m-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Lachlan McKinna In situ measurement protocols |
| Spectral phytoplankton absorption coefficients | OC_IOP | Spectral absorption coefficients for total phytoplankton absorption at multiple wavelengths between 350 and 700-nm. Provides information on phytoplankton physiology, abundance, and community composition. | m-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Lachlan McKinna In situ measurement protocols |
| Spectral non-algal particle plus dissolved organic matter absorption coefficients | OC_IOP | 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. | m-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Lachlan McKinna In situ measurement protocols |
| 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. | m-1 | TBD | POC: Lachlan McKinna In situ measurement protocols | ||
| 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. | nm-1 | TBD | POC: Lachlan McKinna In situ measurement protocols | ||
| 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. | nm-1 | TBD | POC: Lachlan McKinna In situ measurement protocols | ||
| Spectral particulate 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. | nm-1 | TBD | POC: Lachlan McKinna In situ measurement protocols | ||
| Spectral particle backscattering coefficients | OC_IOP | 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. | m-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Lachlan McKinna In situ measurement protocols |
| Fluorescence line height | OC_AOP | Light leaving the surface ocean due to the sun induced chlorophyll fluorescence. Provides an indicator of phytoplankton physiology (health?). | W m-2 um-1 sr-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Ivona Cetinić |
| Photosynthetically available radiation (PAR) | OC_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. Retrievals include instantaneous planar PAR above and below the sea surface, instantaneous scalar PAR below the surface, daily planar PAR above and below the surface, and daily scalar PAR below the surface. | daily PAR: mol m-1 d-1
instantaneous PAR: micromol m-1s-1 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Amir Ibrahim |
| Concentration of chlorophyll-a | OC_BGC | Near surface concentration of the photosynthetic pigment chlorophyll-a. Provides proxies for algal biomass, ecosystem health and function, and eutrophication. | mg m-3 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Ivona Cetinić In situ measurement protocols |
| 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). | mg m-3 | TBD | POC: Ivona Cetinić In situ measurement protocols | ||
| 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). | mg C m-2 d-1 | Level-4 4-km; daily, 8-day, monthly, annual | POC: Ivona Cetinić In situ measurement protocols | ||
| Phytoplankton community composition: MOANA | The composition and distribution of three phytoplankton populations in the Atlantic Ocean. Specifically, near-surface concentrations (cells mL-1 of Prochlorococcus, Synechococcus, and autotrophic picoeukaryotes are retrieved using principle component analysis and multiple regression techniques. | cells mL-1 | Level-3 Atlantic only; 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Ivona Cetinić Imagery submission guidelinesCytometry submission guidelines | |
| Phytoplankton community composition: Cyanobacteria Index | ILW | Metric representing the relative abundance of cyanobacteria in U.S. inland lakes by assessing the spectral shape around 680 nm to assist in identifying harmful algal blooms. | sr-1 | TBD | POC: Bridget Seegers Wynne et al., 2008 (DOI) | |
| Concentration of particulate organic carbon | OC_BGC | 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 transfered towards higher trophic levels and into the deep ocean. | mg m-3 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Ivona Cetinić In situ measurement protocols |
| 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). | mol m-3 | TBD | ATBD POC: Ivona Cetinić | ||
| Concentration of phytoplankton carbon | OC_BGC | 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. | mg m-3 | Level-2 1.2-km native; daily - Level-3 4-km; daily, 8-day, monthly, annual | Provisional | ATBD POC: Ivona Cetinić |
| 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. | mmol m-3 | TBD | |||
| Suspended particulate matter | Near surface concentration of particles both living (phytoplankton, zooplankton, bacteria) and non-living (detritus, sediments). | mg m-3 | TBD | Anticipated regional only. | ||
| Atmospheric Properties to be Produced by OCI Optical, microphysical, and macrophysical properties of aerosols (e.g. dust, smoke) and clouds in the atmosphere. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| Spectral aerosol optical depth | AER_UAA | 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. | unitless | Level-2 8.4-km at nadir, daily - Level-3 0.1-deg, 1-deg; temporal TBD | Test | POC: Andrew Sayer Remer et al., 2019 (DOI) |
| Aerosol fine mode fraction (over ocean) | AER_UAA | Fraction of visible aerosol optical depth from fine mode aerosols over oceans at 550 nm. | unitless | Level-2 8.4-km at nadir, daily - Level-3 0.1-deg, 1-deg; temporal TBD | Test | POC: Andrew Sayer Remer et al., 2019 (DOI) |
| Aerosol single scattering albedo | AER_UAA | Ratio of scattering aerosol optical thickness to total aerosol optical thickness, a measure of aerosol absorption. Determined at near-UV and visible wavelengths under certain conditions only. | unitless | Level-2 8.4-km at nadir, daily - Level-3 0.1-deg, 1-deg; temporal TBD | Test | POC: Andrew Sayer Remer et al., 2019 (DOI) |
| Ultraviolet absorbing aerosol index | UVAI_UAA | A semi-quantitative parameter related to the amount, altitude, and level of absorption of light-absorbing aerosols such as mineral dust or smoke. | unitless | Level-2 1.2-km native, daily - Level-3 0.1-deg, 1-deg; temporal TBD | Test | POC: Andrew Sayer Remer et al., 2019 (DOI) |
| Nitrogen dioxide (NO2) vertical column density | NULL | Column abundance of nitrogen dioxide molecules. Important for air quality and atmospheric chemistry purposes, and atmospheric correction of surface reflectances. | molecules cm-2 | TBD | POC: Andrew Sayer | |
| Cloud mask | CLDMASK | 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. | unitless | Level-2 1.2-km native; daily - Level-3 4 km; 0.1 deg, 1 deg; daily, 8-day, monthly | Provisional | POC: Andrew Sayer |
| Cloud phase | CLD | 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. | unitless | Level-2 1.2-km native; daily - Level-3 4 km; 0.1 deg, 1 deg; daily, 8-day, monthly | Provisional | POC: Andrew Sayer Platnick et al. 2020 (DOI) |
| Cloud top pressure of opaque clouds | CLD | Atmospheric pressure at the height of the cloud top. Useful for climate research and in L1c reaggregation. | hPa | Level-2 1.2-km native; daily - Level-3 4 km; 0.1 deg, 1 deg; daily, 8-day, monthly | Provisional | POC: Andrew Sayer Sayer et al. 2024 (DOI) |
| Optical thickness of liquid and ice clouds | CLD | Measurement of extinction of the solar beam due to clouds in the mid-visible wavelength. Used for climate studies. | unitless | Level-2 1.2-km native; daily - Level-3 4 km; 0.1 deg, 1 deg; daily, 8-day, monthly | Provisional | POC: Andrew Sayer Platnick et al. 2020 (DOI) |
| Effective radius of liquid and ice clouds | CLD | Ratio of the third to second moments of the cloud droplet size distribution, as an indicator of cloud particle size. Used for climate studies. | microns | Level-2 1.2-km native; daily - Level-3 4 km; 0.1 deg, 1 deg; daily, 8-day, monthly | Provisional | POC: Andrew Sayer Platnick et al. 2020 (DOI) |
| Water path of liquid and ice clouds | CLD | Mass of (liquid or ice) water in clouds in the vertical column. Used for climate studies. | gm-2 | Level-2 1.2-km native; daily - Level-3 4 km; 0.1 deg, 1 deg; daily, 8-day, monthly | Provisional | POC: Andrew Sayer Platnick et al. 2020 (DOI) |
| Shortwave radiation effect | Reflected solar flux (spectral and directional integral of reflected sunlight). | W m-2 | Level-3 1-deg x 1-deg; daily, monthly | POC: Brian Cairns | ||
| Land Data Products to be Produced by OCI Physical and optical properties of the land surface. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| Surface reflectance | SFREFL | Effective reflectance of the Earth's surface as observed by OCI. Used as an input to downstream land data products. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| BRDF/albedo and model parameters | Describes the spectral and directional dependence of surface reflectance. | unitless | TBD | |||
| Normalized difference vegetation index (NDVI) | LANDVI | Empirical metric related to vegetation abundance and health, corrected for atmospheric scattering and absorption. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Enhanced vegetation index (EVI) | LANDVI | Empirical metric related to vegetation abundance and health, similar to NDVI, with additional resistance to atmospheric effects and sensitivity in densely vegetated regions. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Normalized Difference Water Index (NDWI) | LANDVI | Empirical metric using NIR and SWIR (1250 nm) bands to investigate vegetation water content and stress. | unitless | Level-2 1.2-km native, daily - Level-3 4-km and 0.1-deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Normalized Difference Infrared Index (NDII) | LANDVI | Empirical metric using NIR and SWIR (1618 nm) bands to investigate vegetation water content and stress. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Chlorophyll-Carotenoid Index (CCI) | LANDVI | Empirical metric related to photosynthesis through chlorophyll/carotenoid pigment dynamics. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Normalized Difference Snow Index (NDSI) | LANDVI | Empirical metric for evaluating the presence of snow in any given pixel. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Photochemical reflectance index (PRI) | LANDVI | Hyperspectral vegetation index designed to capture subtle shifts in carotenoids and provides information on stress in plants | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Chlorophyll Index Red Edge (CIRE) | LANDVI | Hyperspectral vegetation index related to canopy chlorophyll content using red edge (NIR) surface reflectance measurements. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Carotenoid Content Index (Car) | LANDVI | Hyperspectral vegetation index related to canopy carotenoid content, a pigment which plays a role in photosynthesis and photo-protection. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Modified Anthocyanin Reflectance Index (mARI) | LANDVI | Hyperspectral vegetation index related to canopy anthocyanin content, a pigment which protects leaves from excess light. | unitless | Level-2 1.2-km native; daily - Level-3 4-km and 0.1 deg; daily, 8-day, monthly | Provisional | ATBD POC: Skye Caplan |
| Aerosol and Ocean Properties from HARP2 Data products generated as a multi-parameter retrieval for HARP2. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| 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. | unitless | TBD | POC: Meng Gao FastMAPOL | ||
| Aerosol size distribution | Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins. | depends on parameterization scheme | TBD | POC: Meng Gao FastMAPOL | ||
| Aerosol complex refractive index | Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption. | unitless | TBD | POC: Meng Gao FastMAPOL | ||
| Aerosol layer height | Parameterization of aerosol vertical distribution. | depends on parameterization scheme | TBD | POC: Meng Gao FastMAPOL | ||
| Aerosol shape, fraction spherical | Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids. | unitless | TBD | POC: Meng Gao FastMAPOL | ||
| 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. | sr-1 | TBD | POC: Meng Gao FastMAPOL | ||
| Aerosol single scattering albedo | Ratio of aerosol scattering to extinction. | unitless | TBD | POC: Meng Gao FastMAPOL | ||
| Ocean surface roughness | Surface roughness defines the directionality of the solar specular reflectance (sunglint), often parameterized by wind speed and direction. | depends on parameterization scheme | TBD | POC: Meng Gao FastMAPOL | ||
| 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. | depends on parameterization scheme | TBD | POC: Meng Gao FastMAPOL | ||
| Aerosol and Land Surface Properties from HARP2 Products produced as a multi-parameter retrieval for HARP2 scenes over land in cloud-free conditions. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| 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. | unitless | TBD | POC: Kirk Knobelspiesse | ||
| Aerosol number concentration | Number of aerosols present within a defined volume or area. | per unit area, or volume | TBD | POC: Kirk Knobelspiesse | ||
| Aerosol size distribution | Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins. | depends on parameterization scheme | TBD | POC: Kirk Knobelspiesse | ||
| Aerosol complex refractive index | Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption. | unitless | TBD | POC: Kirk Knobelspiesse | ||
| Aerosol layer height | Parameterization of aerosol vertical distribution. | depends on parameterization scheme | TBD | POC: Kirk Knobelspiesse | ||
| Aerosol shape, fraction spherical | Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids. | unitless | TBD | POC: Kirk Knobelspiesse | ||
| Aerosol single scattering albedo | Ratio of aerosol scattering to extinction. | unitless | TBD | POC: Kirk Knobelspiesse | ||
| 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. | depends on parameterization scheme | TBD | POC: Kirk Knobelspiesse | ||
| Spectrally resolved land surface Bidirectional Polarized Distribution Function (BPDF) | Defines the surface polarization as a function of illumination and observation characteristics. | depends on parameterization scheme | TBD | POC: Kirk Knobelspiesse | ||
| Cloud Properties from HARP2 Products that define the cloud state as observed by HARP2. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| Cloud physical thickness | Distance between cloud base and cloud top. | km | TBD | POC: Chamara Rajapakshe Sinclair et al., 2019 (DOI) | ||
| Cloud top height | Altitude of cloud top. | km | TBD | POC: Chamara Rajapakshe van Diedenhoven et al, 2007 (DOI); van Diedenhoven et al., 2013 (DOI); Sinclair et al., 2017 (DOI) | ||
| Cloud liquid index | Determination of liquid or ice phase cloud. | unitless | TBD | POC: Chamara Rajapakshe Riedi, et al, 2010 (DOI) | ||
| Cloud optical depth | Synonymous with cloud optical thickness. | unitless | TBD | POC: Chamara Rajapakshe Liang et al., 2009 (DOI); Werner et al. 2018 (DOI) | ||
| Liquid cloud droplet effective radius and effective variance | A microphysical property describing droplet size distribution and distribution width. | microns and unitless | TBD | POC: Chamara Rajapakshe Alexandrov et al., 2012 (DOI); Breon and Doutriaux-Boucher, 2005 (DOI); McBride et al., 2019 (DOI) | ||
| Ice particle shape, roughness and asymmetry parameter | Parameterization of shape is relevant for radiative transfer modeling. | unitless | TBD | POC: Chamara Rajapakshe van Diedenhoven et al., 2020 (DOI) | ||
| Liquid water path | Can be derived from measures of optical depth and droplet size distribution. | gm-2 | TBD | POC: Chamara Rajapakshe Stephens, 1978 (DOI); Brenguier et al., 2003 (DOI); Miller et al., 2016 (DOI) | ||
| 3D cloud field | 3D reconstruction of cloud vertical and horizontal distribution using multi-angle polarimetry. | m-1 | TBD | POC: Sean Foley Foley et al., 2024 (DOI) | ||
| Aerosol, Ocean, and Land Properties from SPEXone Products produced as a multi-parameter retrieval for SPEXone scenes in cloud-free conditions. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| 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. | unitless | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol size distribution | Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins. | depends on parameterization scheme | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol complex refractive index | Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption. | unitless | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol layer height | Parameterization of aerosol vertical distribution. | depends on parameterization scheme | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol shape, fraction spherical | Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids. | unitless | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol single scattering albedo | Ratio of aerosol scattering to extinction. | unitless | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Ocean surface roughness | Surface roughness defines the directionality of the solar specular reflectance (sunglint), often parameterized by wind speed and direction. | depends on parameterization scheme | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| 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. | depends on parameterization scheme | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| 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. | depends on parameterization scheme | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol number concentration | Number of aerosols present within a defined volume or area. | per unit area, or volume | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Spectrally resolved land surface Bidirectional Polarized Distribution Function (BPDF) | Defines the surface polarization as a function of illumination and observation characteristics. | depends on parameterization scheme | Level-2 5.2-km; daily | Provisional | POC: Otto Hasekamp ATBD | |
| Aerosol and Ocean Properties from OCI + HARP2 + SPEXone Data products generated as a multi-parameter retrieval for HARP2 or SPEXone scenes over the ocean in cloud-free conditions. | ||||||
|---|---|---|---|---|---|---|
| Product | L2 Suite | Description and Use | Units | Availability | Status | Additional Info |
| 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. | unitless | TBD | POC: James Allen MAPP | ||
| Aerosol size distribution | Multiple parameters describing the distribution of aerosol sizes. May include multiple size modes or bins. | depends on parameterization scheme | TBD | POC: James Allen MAPP | ||
| Aerosol complex refractive index | Real and imaginary component of refractive index for each aerosol mode. This defines aerosol extinction, scattering and absorption. | unitless | TBD | POC: James Allen MAPP | ||
| Aerosol layer height | Parameterization of aerosol vertical distribution. | depends on parameterization scheme | TBD | POC: James Allen MAPP | ||
| Aerosol shape, fraction spherical | Fraction of aerosols that are treated as spheres versus other shapes, such as spheroids. | unitless | TBD | POC: James Allen MAPP | ||
| Aerosol scattering phase matrix | Defined by above parameters, this describes the angular distribution of scattering and polarization. | unitless | TBD | POC: James Allen MAPP | ||
| Aerosol single scattering albedo | Ratio of aerosol scattering to extinction. | unitless | TBD | POC: James Allen MAPP | ||
| 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 | sr-1 | TBD | POC: James Allen MAPP | ||
| Ocean surface roughness | Surface roughness defines the directionality of the solar specular reflectance (sunglint), often parameterized by wind speed and direction. | depends on parameterization scheme | TBD | POC: James Allen MAPP | ||
| 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. | depends on parameterization scheme | TBD | POC: James Allen MAPP | ||
| 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. | depends on parameterization scheme | TBD | POC: James Allen MAPP | ||