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  • Aboveground Biomass Density for High Latitude Forests from ICESat-2, 2020

    https://cmr.earthdata.nasa.gov/search/concepts/C2756302505-ORNL_CLOUD.xml
    Description:

    This dataset provides estimates of Aboveground dry woody Biomass Density (AGBD) for high northern latitude forests at a 30-m spatial resolution. It is designed both for boreal-wide mapping and filling the northern spatial data gap from NASA's Global Ecosystem Dynamics Investigation (GEDI) project. Mapping forest aboveground biomass is essential for understanding, monitoring, and managing forest carbon stocks toward climate change mitigation. The AGBD estimates cover the extent of high latitude boreal forests and extend southward to 50 degrees latitude outside the boreal zone. AGBD was predicted using two modeling steps: 1) Ordinary Least Squares (OLS) regression related field plot measurements of AGBD to NASA's ICESat-2 30-m lidar samples, and 2) random forest models were used to extend estimates beyond the field plots by relating ICESat-2 AGBD predictions to wall-to-wall covariate stacks from Harmonized Landsat Sentinel-2 (HLS) and the Copernicus DEM. Per-pixel uncertainties are estimated from bootstrapping both models. Non-vegetated areas (e.g. built up, water, rock, ice) were masked out. HLS composites and ICESat-2 data were from 2019-2021; three years of conditions were aggregated into the circa 2020 map. ICESat-2 data were filtered to include only strong beams, growing seasons (June through September), solar elevations less than 5 degrees, snow free land (snow flag set to 1), and "msw_flag" equal to 0 (clear skies and no observed atmospheric scattering). ICESat-2's ATL08 product was resampled to a 30-m spatial resolution to better match both the field plots and mapped pixels. HLS data (L30HLS) were used to create a greenest pixel composite of growing season multispectral data, which was then used to compute a suite of vegetation indices: NDVI, NDWI, NBR, NBR2, TCW, TCG. These were then used, in combination with the slope and elevation data from the Copernicus DEM product, to predict 30-m AGBD per 90-km tile. Estimates of mean AGBD with standard deviation are provided in cloud-optimized GeoTIFF (CoG) format. Training data are in comma-separated values (CSV) format. A polygon map of data tiles is included as a GeoPackage file and a Shapefile.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 43.705 -179.818 78.5313 178.399

    ORNL_CLOUD Short Name: Boreal_AGB_Density_ICESat2_2186 Version ID: 1 Unique ID: C2756302505-ORNL_CLOUD

  • ATLAS/ICESat-2 ATL02 Linear Impulse Response, Version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C3972968262-NSIDCV0.xml
    Description:

    This ancillary ICESat-2 data set contains the linear impulse response in units of time-of-flight (TOF), which was measured over the Salar de Uyuni using ATL02 photon data. The linear impulse response describes the observed shape of the laser pulse after it returns from a flat surface through the ATLAS instrument. The data can be used to model (sub-)surface scattering or remove instrument effects such as after-pulses from surface return data.

    Links: Temporal Extent: Spatial Extent:

    NSIDCV0 Short Name: ATL02_ANC_LIR Version ID: 1 Unique ID: C3972968262-NSIDCV0

    This collection does not contain any granules

  • ATLAS/ICESat-2 L1B Converted Telemetry Data V007

    https://cmr.earthdata.nasa.gov/search/concepts/C2842844928-NSIDC_CPRD.xml
    Description:

    These Level 1B time-ordered telemetry data are used for system-level, quality control analysis by the Advanced Topographic Laser Altimeter System (ATLAS) ICESat-2 Science Investigator-led Processing System (SIPS). They also provide source data for the Level 2 products and the Precision Orbit Determination (POD) and Precision Pointing Determination (PPD) computations.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL02 Version ID: 007 Unique ID: C2842844928-NSIDC_CPRD

  • ATLAS/ICESat-2 L2A Global Geolocated Photon Data V007

    https://cmr.earthdata.nasa.gov/search/concepts/C3326974349-NSIDC_CPRD.xml
    Description:

    ATL03 contains height above the WGS 84 ellipsoid, latitude, longitude, and time for each photon downlinked by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board ICESat-2. This product was designed to be a single source for all photon data and ancillary information needed by higher-level ATLAS/ICESat-2 products.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL03 Version ID: 007 Unique ID: C3326974349-NSIDC_CPRD

  • ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles V007

    https://cmr.earthdata.nasa.gov/search/concepts/C3420692319-NSIDC_CPRD.xml
    Description:

    ATL04 contains along-track normalized relative backscatter (NRB) profiles of the atmosphere. The product includes full 532 nm (14 km tall) uncalibrated attenuated backscatter profiles at 25 times per second for vertical bins of approximately 30 meters. Calibration coefficient values derived from data between 13.5 and 11 km above the surface are also included. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the ICESat-2 observatory.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL04 Version ID: 007 Unique ID: C3420692319-NSIDC_CPRD

  • ATLAS/ICESat-2 L3A Along Track Coastal and Nearshore Bathymetry V001

    https://cmr.earthdata.nasa.gov/search/concepts/C3433822507-NSIDC_CPRD.xml
    Description:

    ATL24 provides global along-track coastal and nearshore bathymetry, consisting of refraction-corrected seafloor and sea surface heights (orthometric and ellipsoidal heights and instantaneous depths), as well as associated uncertainties. The data are derived from ATLAS/ICESat-2 L2A Global Geolocated Photon Data (ATL03).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL24 Version ID: 001 Unique ID: C3433822507-NSIDC_CPRD

  • ATLAS/ICESat-2 L3A Along Track Coastal and Nearshore Bathymetry V002

    https://cmr.earthdata.nasa.gov/search/concepts/C4085168939-NSIDC_CPRD.xml
    Description:

    ATL24 provides global along-track coastal and nearshore bathymetry, consisting of refraction-corrected seafloor and sea surface heights (orthometric and ellipsoidal heights and instantaneous depths), as well as associated uncertainties. The data are derived from ATLAS/ICESat-2 L2A Global Geolocated Photon Data (ATL03).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL24 Version ID: 002 Unique ID: C4085168939-NSIDC_CPRD

  • ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data Quick Look V007

    https://cmr.earthdata.nasa.gov/search/concepts/C3566183861-NSIDC_CPRD.xml
    Description:

    ATL13QL is the quick look version of ATL13 and is based on the same algorithms that generate the ATL13 final data products. Once final ATL13 files are available, the corresponding ATL13QL files are removed. ATL13QL provides along-track surface water products for inland water bodies, defined as lakes, reservoirs, bays, estuaries, rivers, and a 7 km near-shore buffer. Data parameters include surface water height statistics and related parameters including significant wave height, transect slope, subsurface signal attenuation, and shallow water bathymetry. Water surface heights are provided as both orthometric height and height referencing the WGS84 ellipsoid.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL13QL Version ID: 007 Unique ID: C3566183861-NSIDC_CPRD

  • ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data V007

    https://cmr.earthdata.nasa.gov/search/concepts/C3565574351-NSIDC_CPRD.xml
    Description:

    ATL13 provides along-track surface water products for inland water bodies, defined as lakes, reservoirs, bays, estuaries, rivers, and a 7 km near-shore buffer. Data parameters include surface water height statistics and related parameters including significant wave height, transect slope, subsurface signal attenuation, and shallow water bathymetry. Water surface heights are provided as both orthometric height and height referencing the WGS84 ellipsoid. ATL13 is also used to produce the ATLAS/ICESat-2 L3B Mean Inland Surface Water Data product (ATL22).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL13 Version ID: 007 Unique ID: C3565574351-NSIDC_CPRD

  • ATLAS/ICESat-2 L3A Calibrated Backscatter Profiles and Atmospheric Layer Characteristics Quick Look V007

    https://cmr.earthdata.nasa.gov/search/concepts/C3566183507-NSIDC_CPRD.xml
    Description:

    ATL09QL is the quick look version of ATL09 and is based on the same algorithms that generate the ATL09 final data products. Once final ATL09 files are available, the corresponding ATL09QL files are removed. ATL09QL contains calibrated, attenuated backscatter profiles (CAB), layer-integrated attenuated backscatter, blowing snow, and other parameters including cloud and aerosol layer height and atmospheric characteristics. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the ICESat-2 observatory.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -88 -180 88 180

    NSIDC_CPRD Short Name: ATL09QL Version ID: 007 Unique ID: C3566183507-NSIDC_CPRD