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Earthdata

Aerosols
- Atmosphere
  - Aerosols
Agriculture
- Agricultural Chemicals
  - Fertilizers
  - Pesticides
- Agricultural Plant Science
  - Crop/Plant Yields
  - Cropping Systems
  - Irrigation
  - Plant Diseases/Disorders/Pests
- Animal Commodities
  - Dairy Products
- Animal Science Animal Ecology And Behavior Animal Manure And Waste Animal Yields
- Forest Science
  - Afforestation/Reforestation
  - Forest Conservation
  - Forest Fire Science
  - Forest Harvesting And Engineering
  - Forest Management
  - Forest Mensuration
  - Forest Protection
  - Forest Yields
  - Reforestation
- Plant Commodities
  - Field Crop Products
- Soils
  - Carbon
  - Electrical Conductivity
  - Nitrogen
  - Phosphorus
  - Soil Bulk Density
  - Soil Chemistry
  - Soil Classification
  - Soil Gas/Air
  - Soil Heat Budget
  - Soil Infiltration
  - Soil Moisture/Water Content
  - Soil Porosity
  - Soil Respiration
  - Soil Temperature
  - Soil Texture
  - Sulfur
Atmosphere
- Aerosols
  - Aerosol Backscatter
  - Aerosol Extinction
  - Aerosol Forward Scatter
  - Aerosol Optical Depth/Thickness
  - Aerosol Particle Properties
  - Aerosol Radiance
  - Black Carbon
  - Carbonaceous Aerosols
  - Chemical Composition
  - Cloud Condensation Nuclei
  - Deposition
  - Dust/Ash/Smoke
  - Nitrate Particles
  - Organic Particles
  - Particle Images
  - Particulate Matter
  - Sea Salt
  - Sulfate Particles
- Air Quality
  - Carbon Monoxide
  - Emissions
  - Nitrogen Oxides
  - Particulates
  - Smog
  - Sulfur Oxides
  - Tropospheric Ozone
  - Turbidity
  - Visibility
  - Volatile Organic Compoun
- Altitude
  - Barometric Altitude
  - Geopotential Height
  - Planetary Boundary Layer Height
  - Tropopause
- Atmospheric Chemistry
  - Carbon And Hydrocarbon Compounds
  - Halocarbons And Halogens
  - Hydrogen Compounds
  - Nitrogen Compounds
  - Oxygen Compounds
  - Photochemistry
  - Sulfur Compounds
  - Trace Elements/Trace Metals
  - Trace Gases/Trace Species
- Atmospheric Chemistry/Carbon And Hydrocarbon Compounds
  - Non-Methane Hydrocarbons
- Atmospheric Electricity
  - Atmospheric Conductivity
  - Electric Field
  - Lightning
- Atmospheric Phenomena
  - Storms
- Atmospheric Pressure
  - Air Mass/Density
  - Atmospheric Pressure Measurements
  - Differential Pressure
  - Oscillations
  - Planetary Boundary Layer Height
  - Pressure Tendency
  - Pressure Thickness
  - Sea Level Pressure
  - Static Pressure
  - Surface Pressure
- Atmospheric Radiation
  - Absorption
  - Actinic Flux
  - Airglow
  - Albedo
  - Anisotropy
  - Atmospheric Emitted Radiation
  - Atmospheric Heating
  - Emissivity
  - Heat Flux
  - Incoming Solar Radiation
  - Longwave Radiation
  - Net Radiation
  - Optical Depth/Thickness
  - Outgoing Longwave Radiation
  - Radiative Flux
  - Radiative Forcing
  - Reflectance
  - Scattering
  - Shortwave Radiation
  - Solar Irradiance
  - Solar Radiation
  - Sunshine
  - Transmittance
  - Ultraviolet Radiation
- Atmospheric Temperature
  - Air Temperature
  - Atmospheric Stability
  - Atmospheric Temperature Indices
  - Surface Temperature
  - Air Temperature
- Atmospheric Water Vapor
  - Condensation
  - Dew Point Temperature
  - Humidity
  - Precipitable Water
  - Water Vapor
  - Water Vapor Indicators
  - Water Vapor Indices
  - Water Vapor Processes
  - Water Vapor Profiles
- Atmospheric Winds
  - Boundary Layer Winds
  - Flight Level Winds
  - Local Winds
  - Surface Winds
  - Upper Level Winds
  - Wind Dynamics
  - Wind Profiles
  - Wind Shear
- Cloud Properties
  - Clouds
- Clouds
  - Cloud Amount/Frequency
  - Cloud Condensation Nuclei
  - Cloud Droplet Distribution
  - Cloud Dynamics
  - Cloud Height
  - Cloud Liquid Water/Ice
  - Cloud Microphysics
  - Cloud Properties
  - Cloud Radiative Transfer
  - Cloud Types
  - Convective Clouds/Systems (Observed/Analyzed)
  - Droplet Concentration/Size
  - Stratospheric Clouds (Observed/Analyzed)
  - Tropospheric/High-Level Clouds (Observed/Analyzed)
  - Tropospheric/Low Level Clouds (Observed/Analyzed)
  - Tropospheric/Mid-Level Clou
- Humidity Indices
  - Humidity
- Ocean Winds
  - Surface Winds
- Precipitation
  - Accumulative Convective Precipitation
  - Atmospheric Precipitation Indices
  - Cloud Microphysics
  - Droplet Size
  - Hydrometeors
  - Liquid Precipitation
  - Liquid Water Equivalent
  - Precipitation Amount
  - Precipitation Anomalies
  - Precipitation Profiles
  - Precipitation Rate
  - Rain
  - Snow Water Equivalent
  - Solid Precipitation
  - Total Surface Precipitation Rate
- Radar
  - Radar Reflectivity
- Spectral/Engineering
  - Airspeed/Ground Speed
  - Attitude Characteristics
- Weather Events
  - Droughts
  - Fog
  - Freeze/Frost
  - Lightning
  - Rain Storms
  - Tropical Cyclones
  - Weather/Climate Advisories
Biological Classification
- Animals/Vertebrates
  - Amphibians
  - Mammals
    - Carnivores
    - Even-Toed Ungulates
- Fungi
  - Lichens
- Plants
  - Angiosperms (Flowering Plants)
  - Mosses/Hornworts/Liverwor
- Protists
  - Plankton
    - Phytoplankton
Biosphere
- Ecological Dynamics
  - Community Dynamics
    - Biodiversity Functions
    - Community Structure
    - Plant Succession
    - Species Recruitment
  - Ecosystem Functions
    - Biogeochemical Cycles
    - Biomass Dynamics
    - Carbon Sequestration
    - Consumption Rates
    - Decomposition
    - Nutrient Cycling
    - Photosynthesis
    - Primary Production
    - Respiration Rate
  - Fire Ecology
    - Fire Disturbance
    - Fire Dynamics
    - Fire Models
    - Fire Occurrence
  - Photosynthesis
  - Primary Production
  - Species/Population Interactions
    - Endangered Species
    - Grazing Dynamics/Plant Herbivory
    - Indigenous/Native Species
    - Population Dynamics
    - Range Changes
- Ecosystems
  - Anthropogenic/Human Influenced Ecosystems
    - Agricultural Lands
      - Cropland
      - Pasture
    - Resource Development Site
    - Urban Lands
  - Aquatic Ecosystems
    - Plankton
    - Wetlands
      - Marshes
      - Peatlands
      - Riparian Wetlands
  - Freshwater Ecosystems
    - Lake/Pond
    - Rivers/Stream
  - Marine Ecosystems*
    - Coastal
    - Estuary
  - Terrestrial Ecosystems
    - Alpine/Tundra
    - Deserts
    - Forests
      - Boreal Forest/Taiga
    - Grasslands
    - Savannas
    - Shrubland/Scrub
    - Wetlands
      - Marshes
      - Peatlands
      - Swamps
- Terrestrial Ecosystems
  - Agricultural Lands
  - Alpine/Tundra
  - Beaches
  - Deserts
  - Dunes
  - Forests
  - Grasslands
  - Islands
  - Urban Lands
  - Wetlands
- Vegetation
  - Afforestation/Reforestation
  - Biomass
    - Crop Biomass
  - Canopy Characteristics
  - Canopy Transmittance
  - Carbon
  - Chlorophyll
  - Crown
  - Deciduous Vegetation
  - Dominant Species
  - Evergreen Vegetation
  - Forest Composition/Vegetation Structure
  - Herbivory
  - Leaf Characteristics
    - Leaf Area Index (Lai)
  - Litter Characteristics
  - Nitrogen
  - Nutrients
  - Phosphorus
  - Photosynthetically Active Radiation
    - Fraction Of Absorbed Photosynthetically Active Radiation (Fapar)
  - Pigments
  - Plant Characteristics
    - Crop Density
    - Crop Height
    - Leaf Area Index (Lai)
    - Vegetation Water Content
    - Xylem Dielectric Permittivity
  - Plant Phenology
    - Growth Stage
  - Reclamation/Revegetation/Restoration
  - Reforestation
  - Solar Induced Fluorescence
  - Tree Rings
  - Vegetation Cover
  - Vegetation Index
    - Leaf Area Index (Lai)
    - Normalized Difference Vegetation Index (Ndvi)
  - Vegetation Optical Depth (Vod)
  - Vegetation Species
  - Vegetation Water Potential
Climate Indicators
- Atmospheric/Ocean Indicators
  - Extreme Weather
    - Extreme Drought
    - Extreme Precipitation
    - Heat/Cold Wave Frequency/Intensity
  - Fresh Water River Discharge
  - Precipitation Indicators
  - Precipitation Indices
  - Sea Level Rise
    - Inundation
  - Sea Surface Temperature Indices
    - Extreme Eastern Tropical Pacific Sst
    - Sea Surface Temperature
  - Teleconnections
  - Temperature Indicators
  - Temperature Indices
- Biospheric Indicators
  - Phenological Changes
  - Range Changes
- Carbon Flux
- Cryospheric Indicators
  - Glacial Measurements
    - Glacier Elevation/Ice Sheet Elevation
    - Glacier/Ice Sheet Thickness
  - Ice Edges
  - River Ice Depth/Extent
  - Sea Ice Concentration
  - Sea Ice Elevation
  - Snow Cover
  - Snow Depth
  - Snow Melt
- Environmental Vulnerability Index (Evi)
- Land Surface/Agriculture Indicators
  - Drought Indices
  - Fire Weather Index
  - Forest Fire Danger Index
  - Length Of Growing Season
  - Satellite Soil Moisture Index
  - Soil Moisture
  - Soil Temperature
  - Vegetation Cover
- Paleoclimate Indicators
  - Ice Core Records
    - Carbon Dioxide
  - Paleoclimate Reconstructions
  - Permafrost/Methane Release
  - Volcanic Activity
- Sun-Earth Interactions
- Terrestrial Hydrosphere Indicators
  - Permafrost Melt
  - River/Lake Ice Breakup
  - River/Lake Ice Freeze
Cryosphere
- Frozen Ground
  - Active Layer
  - Ground Ice
  - Periglacial Processes
  - Permafrost
    - Permafrost Temperature
  - Rock Glaciers
  - Soil Temperature
- Glaciers/Ice Sheets
  - Age At Ice-Thickness-Normalized Depths
  - Age Of Internal Reflections
  - Basins
  - Coastline
  - Depths At Specific Ages
  - Firn
    - Firn Air Content
    - Snow Grain Size
  - Geometry Of Internal Reflections
  - Glacier Elevation/Ice Sheet Elevation
  - Glacier Mass Balance/Ice Sheet Mass Balance
  - Glacier Motion/Ice Sheet Motion
  - Glacier Thickness/Ice Sheet Thickness
  - Glacier Topography/Ice Sheet Topography
  - Glaciers
    - Debris Thickness
    - Glacial Lake Extent
    - Glacier Extent
    - Glacier Runoff
    - Grounding Line
    - Sub-Debris Melt Enhancement
  - Ice Sheets
    - Surface Morphology
  - Ice Shelves
  - Icebergs
- Land Ice/Ocean Classification
- Sea Ice
  - Freeboard
  - Heat Flux
  - Ice Deformation
  - Ice Depth/Thickness
  - Ice Edges
  - Ice Extent
    - Ice Extent
  - Ice Floes
  - Ice Growth/Melt
  - Ice Roughness
  - Ice Temperature
    - Ice Temperature
  - Ice Types
  - Icebergs
  - Leads
  - Pack Ice
  - Polynyas
  - Reflectance
  - Sea Ice Age
  - Sea Ice Concentration
    - Sea ice Fraction
    - Sea Ice Concentration
  - Sea Ice Elevation
  - Sea Ice Motion
  - Sea Ice/Ocean Classification
  - Snow Depth
  - Snow Melt
- Snow/Ice
  - Albedo
  - Blowing Snow
  - Freeze/Thaw
    - Transition Direction
  - Ice Depth/Thickness
    - Ice Thickness
  Ice Extent * Snow Extent
  - Ice Growth/Melt
  - Ice Motion
  - Ice Surface Temperature
  - Ice Velocity
  - Lake Ice
    - Fractional Snow Cover
  - Permafrost
  - Reflectance
    - Bidirectional Reflectance Factor
  - River Ice
  - Snow Cover
    - Fractional Snow Cover
    - Snow Cover
  - Snow Density
  - Snow Depth
  - Snow Melt
    - Snow Wetness
  - Snow Microstructure
    - Specific Surface Area
  - Snow Stratigraphy
  - Snow Water Equivalent
  - Snow/Ice Temperature
  - Surface Melt
Environmental Advisories
- Marine Advisories
- Weather/Climate Advisories
  - Air Quality
    - Visibility
  - Climate Advisories
  - Present Weather
  - Weather Forecast
Human Dimensions
- Boundaries
  - Administrative Divisions
  - Boundary Surveys
  - Political Divisions
- Economic Resources
  - Agriculture Production
  - Energy Production/Use
    - Biomass Energy Production/Use
    - Methane Production/Use
    - Natural Gas Production/Use
    - Petroleum Production/Use
- Environmental Governance/Management
  - Environmental Assessments
  - Land Management
    - Land Use Classes
    - Land Use/Land Cover Classification
- Environmental Impacts
  - Acid Deposition
  - Agricultural Expansion
  - Biomass Burning
  - Conservation
  - Fossil Fuel Burning
  - Gas Flaring
  - Industrial Emissions
  - Nuclear Radiation Exposure
- Habitat Conversion/Fragmentation
  - Deforestation
  - Reforestation/Revegetation
  - Urbanization/Urban Sprawl
- Human Settlements
  - Rural Areas
  - Urban Areas
- Infrastructure
  - Buildings
  - Cultural Features
  - Electricity
  - Transportation
- Natural Hazards
  - Droughts
  - Earthquakes
  - Floods
  - Landslides
  - Tropical Cyclones
    - Cyclones
    - Hurricanes
  - Volcanic Eruptions
  - Wildfires
    - Burned Area
- Population
  - Mortality
  - Population Density
  - Population Distribution
  - Population Estimates
  - Population Size
- Public Health
  - Malnutrition
  - Radiation Exposure
- Social Behavior
  - Consumer Behavior
  - Preservation
  - Vulnerability Levels/Index
- Socioeconomics
  - Household Income
  - Industrialization
  - Poverty Levels
- Sustainability
  - Environmental Sustainability
  - Sustainable Development
Land Surface
- Erosion/Sedimentation
  - Degradation
  - Erosion
  - Landslides
  - Sediment Chemistry
  - Sediment Composition
  - Sediment Transport
  - Sedimentation
  - Sediments
  - Stratigraphic Sequence
  - Suspended Solids
  - Weathering
- Frozen Ground
  - Active Layer
  - Periglacial Processes
  - Permafrost
  - Seasonally Frozen Ground
  - Soil Temperature
- Geomorphic Landforms/Processes
  - Aeolian Landforms
    - Dunes
  - Coastal Landforms
    - Deltas
    - Estuaries
    - Salt Marsh
  - Coastal Processes
    - Sea Level Changes
    - Sedimentation
  - Fluvial Landforms
    - Deltas
    - Flood Plain
    - Island
    - Pingo
  - Glacial Landforms
  - Glacial Processes
  - Karst Landforms
  - Tectonic Landforms
    - Volcano
  - Tectonic Processes
- Land Use/Land Cover
  - Land Cover
  - Land Productivity
  - Land Resources
  - Land Use Classes
  - Land Use/Land Cover Classification
    - Vegetation Index
- Landscape
  - Canopy Height
  - Landscape Ecology
  - Landscape Patterns
  - Landscape Processes
  - Reclamation/Revegetation/Restoration
  - Reforestation
  - Terrain Elevation
- Soils
  - Calcium
  - Carbon
    - Net Ecosystem Co2 Exchange (Nee)
    - Soil Organic Carbon (Soc)
  - Cation Exchange Capacity
  - Denitrification Rate
  - Electrical Conductivity
  - Hydraulic Conductivity
  - Magnesium
  - Micronutrients/Trace Elements
  - Nitrogen
  - Organic Matter
  - Permafrost
  - Phosphorus
  - Potassium
  - Soil Bulk Density
  - Soil Chemistry
  - Soil Classification
  - Soil Color
  - Soil Compaction
  - Soil Consistence
  - Soil Depth
  - Soil Erosion
  - Soil Fertility
  - Soil Gas/Air
  - Soil Heat Budget
  - Soil Horizons/Profile
  - Soil Impedance
  - Soil Infiltration
  - Soil Moisture/Water Content
    - Root Zone Soil Moisture
    - Soil Moisture
    - Surface Soil Moisture
  - Soil Ph
  - Soil Porosity
  - Soil Productivity
    - Gross Primary Production (Gpp)
  - Soil Respiration
    - Heterotrophic Respiration (Rh)
  - Soil Rooting Depth
  - Soil Structure
  - Soil Temperature
    - Land Surface Temperature
  - Soil Texture
  - Soil Water Holding Capacity
  - Sulfur
  - Thermal Conductivity
- Surface Radiative Properties
  - Albedo
  - Anisotropy
  - Emissivity
  - Reflectance
    - Solar Irradiance
- Surface Thermal Properties
  - Land Surface Temperature
  - Skin Temperature
- Topography
  - Landforms
  - Surface Roughness
  - Terrain Elevation
    - Bed Elevation
    - Contour Maps
    - Digital Elevation/Terrain Model (Dem)
    - Surface Elevation
    - Surface Range
    - Terrain Elevation
    - Topographical Relief Maps
  - Topographic Effects
  - Topographical Relief
Oceans
- Aquatic Sciences
  - Fisheries
- Bathymetry/Seafloor Topography
- Coastal Processes
  - Barrier Islands
  - Beaches
  - Coastal Elevation
  - Deltas
  - Dunes
  - Erosion
  - Estuaries
  - Fjords
  - Inlets
  - Intertidal Zone
  - Lagoons
  - Mangroves
  - Marshes
  - Rocky Coasts
  - Sea Level Rise
  - Sea Surface Height
  - Sediment Transport
  - Sedimentation
  - Shorelines
  - Tidal Height
- Humidity Indices
- Marine Environment Monitoring Marine Obstructions
- Marine Sediments
- Ocean Chemistry
  - Alkalinity
  - Ammonia
  - Biogeochemical Cycles
  - Carbon
  - Carbon Dioxide
  - Chlorophyll
  - Dissolved Gases
  - Dissolved Solids
  - Inorganic Carbon
  - Nitrate
  - Nutrients
  - Organic Carbon
  - Oxygen
  - Ph
  - Phosphate
  - Pigments
- Ocean Circulation
  - Current Velocity
  - Fresh Water Flux
  - Ocean Currents
  - Ocean Mixed Layer
  - Turbulence
- Ocean Heat Budget
  - Conduction
  - Diffusion
  - Evaporation
  - Heat Flux
    - Latent Heat Flux
    - Sensible Heat Flux
  - Longwave Radiation
  - Reflectance
  - Shortwave Radiation
- Ocean Optics
  - Absorption
  - Attenuation/Transmission
  - Chlorophyll
  - Extinction Coefficients
  - Fluorescence
  - Ocean Color
  - Optical Depth
  - Photosynthetically Active Radiation
  - Photosynthetically Available Radiation
  - Radiance
  - Reflectance
  - Turbidity
  - Water-Leaving Radiance
- Ocean Pressure
  - Sea Level Pressure
  - Surface Pressure
  - Water Pressure
- Ocean Temperature
  - Ocean Mixed Layer
  - Potential Temperature
  - Sea Surface Temperature
    - Blended Sea Surface Temperature
    - Bulk Sea Surface Temperature
    - Sea Surface Skin Temperature
  - Sea Surface Temperature Reconstruction
  - Surface Air Temperature
  - Temperature Profiles
  - Water Temperature
- Ocean Waves
  - Significant Wave Height
  - Wave Height
  - Wave Speed/Direction
  - Wind Waves
- Ocean Waves Swells
- Ocean Waves Wave Fetch
- Ocean Waves Wave Spectra
- Ocean Waves Wind Waves
- Ocean Winds
  - Convergence/Divergence
  - Surface Winds
  - Turbulence
  - Vorticity
  - Wind Shear
  - Wind Stress
- Ocean Winds Surface Winds
- Ocean Winds Turbulence
- Ocean Winds Wind Shear
- Precipitation
- Salinity/Density
  - Conductivity
  - Density
  - Salinity
  - Salt Transport
  - Spice
- Sea Ice
  - Heat Flux
  - Ice Deformation
  - Ice Depth/Thickness
  - Ice Edges
  - Ice Extent
  - Ice Floes
  - Ice Roughness
  - Ice Temperature
  - Ice Types
  - Icebergs
  - Leads
  - Pack Ice
  - Polynyas
  - Reflectance
  - Sea Ice Age
  - Sea Ice Concentration
  - Sea Ice Elevation
  - Sea Ice Motion
  - Sea Ice/Ocean Classification
  - Snow Depth
- Sea Surface Topography
  - Sea Surface Height
  - Sea Surface Slope
- Water Quality
Solid Earth
- Geochemistry
  - Biogeochemical Processes
  - Geochemical Properties
- Geodetics
  - Coordinate Reference System
  - Ellipsoid Characteristics
  - Geoid Characteristics
- Geomagnetism
  - Magnetic Field
- Geomorphic Landforms/Processes
  - Coastal Landforms
  - Fluvial Landforms
  - Glacial Landforms
  - Glacial Processes
  - Tectonic Landforms
- Geothermal Dynamics
  - Geothermal Temperature
- Gravity/Gravitational Field
  - Control Surveys
  - Gravity
    - Accelerations
  - Gravity Anomalies
  - Polar Motion
    - Annual Elliptical Component
    - Chandler Circular Component
  - Rotational Motion/Variations
    - Rotational Rate/Speed
  - Satellite Orbits/Revolution
    - Angle Of Elevation
    - Angle Of Inclination
    - Orbit Type
    - Orbit Velocity
    - Orbital Position
- Rocks/Minerals/Crystals
  - Sedimentary Rocks
- Tectonics
  - Earthquakes
    - Earthquake Magnitude/Intensity
  - Plate Tectonics
    - Crustal Motion
    - Fault Movement
    - Plate Boundaries
    - Strain
  - Volcanic Activity
    - Eruption Dynamics
    - Volcano Occurrences
Spectral/Engineering
- Brightness Temperature
- Infrared Wavelengths * Brightness Temperature
  - Infrared Flux
  - Infrared Imagery
  - Infrared Radiance
    - Radiance
  - Reflected Infrared
  - Sensor Counts
    - Waveform
  - Thermal Infrared
- Lidar
  - Apparent Surface Reflectivity
  - Engineering Telemetry Ancillary Data
  - Lidar
  - Lidar Backscatter
  - Lidar Depolarization Ratio
  - Lidar Waveform
- Microwave
  - Antenna Temperature
    - Brightness Temperature
  - Brightness Temperature
  - Incidence Angle
  - Microwave Imagery
  - Microwave Radiance
  - Sensor Counts
- Platform Characteristics
  - Airspeed/Ground Speed
  - Attitude Characteristics
  - Calibration
  - Data Synchronization Time
  - Flight Data Logs
  - Orbital Characteristics
  - Viewing Geometry
- Precipitation
  - Precipitation Rate
- Radar
  - Bed Elevation
  - Doppler Velocity
  - Precipitation Rate
  - Radar Backscatter
    - Common Midpoint Gather
  - Radar Cross-Section
    - Normalized Radar Cross Section
  - Radar Imagery
  - Radar Reflectivity
    - Two-Way Travel Time
  - Radial Velocity
    - Mean Radial Velocity
  - Return Power
    - Phase And Amplitude
  - Sensor Counts
  - Sigma Naught
  - Spectrum Width
- Radio Wave
  - Radio Wave Flux
- Sensor Characteristics
  - Geolocation
  - Phase And Amplitude
  - Sink Temperature
  - Thermal Properties
  - Total Pressure
  - Total Temperature
  - Ultraviolet Sensor Temperature
  - Viewing Geometry
- Ultraviolet Wavelengths
  - Sensor Counts
  - Ultraviolet Flux
  - Ultraviolet Radiance
    - Radiance
- Visible Wavelengths
  - Reflectance
  - Reflective Band Radiance
  - Sensor Counts
  - Visible Flux
  - Visible Imagery
  - Visible Radiance
    - Radiance
Sun-Earth Interactions
- Ionosphere/Magnetosphere Dynamics
  - Magnetic Fields/Magnetic Currents
- Solar Activity
  - Solar Irradiance
- Solar Energetic Particle Flux
  - Electron Flux
  - Proton Flux
  - X-Ray Flux
- Solar Energetic Particle Properties
  - Energy Deposition
Terrestrial Hydrosphere
- Glaciers/Ice Sheets
  - Firn
  - Glacier Elevation/Ice Sheet Elevation
  - Glacier Motion/Ice Sheet Motion
  - Glacier Topography/Ice Sheet Topography
  - Glaciers
    - Glacier Runoff
  - Ice Sheets
  - Icebergs
- Ground Water
  - Ground Water Chemistry
  - Ground Water Features
    - Aquifers
    - Water Table
  - Ground Water Processes/Measurements
    - Discharge
    - Drainage
    - Percolation
    - Subsurface Flow
- Snow/Ice
  - Albedo
  - Avalanche
  - Freeze/Thaw
  - Frost
  - Ice Extent
  - Ice Growth/Melt
  - Ice Motion
  - Ice Velocity
  - Lake Ice
  - Liquid Water Content
  - Permafrost
  - River Ice
  - Snow Cover
    - Fractional Snow Cover
    - Snow Cover
  - Snow Density
  - Snow Depth
  - Snow Melt
  - Snow Stratigraphy
  - Snow Water Equivalent
  - Snow/Ice Temperature
- Surface Water
  - Lakes
  - Surface Water Chemistry
  - Surface Water Features
    - Drainage Basins
    - Lakes/Reservoirs
      - Elevation
      - Rivers/Streams
    - Water Channels
    - Wetlands
  - Surface Water Processes/Measurements
    - Discharge/Flow
      - Average Flow
    - Drainage
    - Floods
    - Hydropattern
    - Inundation
    - Runoff
      - Runoff Rate
      - Total Runoff
    - Stage Height
    - Total Surface Water
    - Water Depth
  - Total Surface Water
  - Watershed Characteristics
  - Wetlands
- Water Quality/Water Chemistry
  - Gases
    - Dissolved Carbon Dioxide
    - Dissolved Gases
    - Dissolved Oxygen
  - Isotopes
    - Radioisotopes
    - Stable Isotopes
  - Nutrients
    - Nitrogen Compounds
  - Solids
    - Sediments
    - Suspended Solids
    - Total Dissolved Solids
  - Water Characteristics
    - Alkalinity
    - Chlorophyll Concentrations
    - Conductivity
    - Nitrogen Compounds
    - Organic Matter
    - Ph
    - Phosphorous Compounds
    - Turbidity
    - Water Ion Concentrations
    - Water Temperature