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Using the NASA EOSDIS Common Metadata Repository

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  • 500 metre interval contours of Antarctica derived from ERS radar altimetry data.

    https://cmr.earthdata.nasa.gov/search/concepts/C1214308545-AU_AADC.xml
    Description:

    500 metre interval contours of the Antarctic continent derived from slope corrected orthometric heights that were captured using European Remote Sensing (ERS) radar altimetry. ESA's two European Remote Sensing (ERS) satellites, ERS-1 and 2, were launched into the same orbit in 1991 and 1995 respectively. Their payloads included a synthetic aperture imaging radar, radar altimeter and instruments to measure ocean surface temperature and wind fields. ERS-2 added an additional sensor for atmospheric ozone monitoring. The two satellites acquired a combined data set extending over two decades. The ERS-1 mission ended on 10 March 2000 and ERS-2 was retired on 05 September 2011.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -82 -180 -65 180

    AU_AADC Short Name: ERS_CONT_500_ANT Version ID: 1 Unique ID: C1214308545-AU_AADC

  • A digital terrain model of Antarctica in Triangulated Irregular Network (TIN) format, derived from ERS Radar Altimetry.

    https://cmr.earthdata.nasa.gov/search/concepts/C1214308549-AU_AADC.xml
    Description:

    An ESRI formatted triangular irregular network (TIN) of the Antarctic continental terrain, derived from ERS radar altimeter data. The data is in a Polar Stereographic projection with true scale at 71 degrees South. The TIN is unreliable in latitudes south of 82 degrees South and steep areas of the continent, particularly along the coast. ESA's two European Remote Sensing (ERS) satellites, ERS-1 and 2, were launched into the same orbit in 1991 and 1995 respectively. Their payloads included a synthetic aperture imaging radar, radar altimeter and instruments to measure ocean surface temperature and wind fields. ERS-2 added an additional sensor for atmospheric ozone monitoring. The two satellites acquired a combined data set extending over two decades. The ERS-1 mission ended on 10 March 2000 and ERS-2 was retired on 05 September 2011.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -82 -180 -65 180

    AU_AADC Short Name: ERS_DTM_TIN_ANT Version ID: 1 Unique ID: C1214308549-AU_AADC

  • Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry, Version 1

    https://cmr.earthdata.nasa.gov/search/concepts/C1386207013-NSIDCV0.xml
    Description:

    This data set provides a Digital Elevation Model (DEM) for Antarctica to 81.5 degrees south latitude, at a resolution of 5 km. Approximately twenty million data points were used to generate this data set. Data points were derived from ERS-1 radar altimetry during the geodetic phase from March 1994 to May 1995.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -81 -180 -65 180

    NSIDCV0 Short Name: NSIDC-0076 Version ID: 1 Unique ID: C1386207013-NSIDCV0

  • Antarctic iceberg sizes and spatial distribution from SAR image analysis - Map

    https://cmr.earthdata.nasa.gov/search/concepts/C1214311458-AU_AADC.xml
    Description:

    This map shows the distribution of the iceberg data extracted from ERS SAR images. Icebergs are identified in Synthetic Aperture Radar [SAR] images by image analysis using the texture and intensity of the microwave backscatter observations. The images are segmented using an edge detecting algorithm, and segments identified as iceberg or background, which may be sea ice, open water, or a mixture of both. Dimensions of the icebergs are derived by spatial analysis of the corresponding image segments. Location of the iceberg is derived from its position within the image and the navigation data that gives the location and orientation of the image. More than 20,000 individual observations have been extracted from SAR images acquired by the European Space Agency's ERS-1 and 2 satellites and the Canadian Space Agency's Radarsat satellite. Because images can overlap, some proportion of the observations represent multiple observations of the same set of icebergs. Most observations relate to the sector between longitudes 70E and 135E. The data set includes observations from several other discrete areas around the Antarctic coast. In general observations are within 200 km of the coast but in limited areas extend to about 500 km from the coast. This metadata record has been derived from work performed under the auspices of ASAC project 2187 (ASAC_2187). The map in the pdf file shows the extent of the coverage of individual SAR scenes used in the analysis and the abundance and size characteristics (by a limited colour palette) of the identified icebergs.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -80 70 -55 135

    AU_AADC Short Name: AAD_Ant_iceberg_SAR Version ID: 1 Unique ID: C1214311458-AU_AADC

  • Atmospheric Thematic Data Product [MWR_TDPATM]

    https://cmr.earthdata.nasa.gov/search/concepts/C3325393992-ESA.xml
    Description:

    This is the Atmospheric Thematic Data Product (TDP) V1 resulting from the _$$ESA FDR4ALT project$$ https://www.fdr4alt.org/ and containing Total Column Water Vapour (TCWV), Cloud Liquid Water Path (LWP), Atmospheric Attenuation of the altimeter backscattering coefficient at Ku-band (AttKu), and Wet Tropospheric Correction (WTC), retrieved from observations of the Microwave Radiometer (MWR) instruments flown on-board the ERS-1, and ERS-2, and Envisat satellites. Compared to existing datasets, the Atmospheric TDP demonstrates notable improvements in several aspects: Improved temporal coverage, especially for ERS-2 Improved L0 -> 1 processing Two different corrections are provided based on a neural network retrieval or on a 1D-VAR approach The FDR4ALT products are available in NetCDF format. Free standard tools for reading NetCDF data can be used. Information for expert altimetry users is also available in a dedicated NetCDF group within the products. Please consult the _$$FDR4ALT Product User Guide$$ https://earth.esa.int/eogateway/documents/d/earth-online/fdr4alt-products-user-guide before using the data. The FDR4ALT datasets represent the new reference data for the ERS/Envisat altimetry missions, superseding any previous mission data. Users are strongly encouraged to make use of these datasets for optimal results.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    ESA Short Name: TDPforAtmosphere Version ID: 4.0 Unique ID: C3325393992-ESA

  • AVISO Level 4 Absolute Dynamic Topography for Climate Model Comparison

    https://cmr.earthdata.nasa.gov/search/concepts/C2617226203-POCLOUD.xml
    Description:

    This dataset contains absolute dynamic topography (similar to sea level but with respect to the geoid) binned and averaged monthly on 1 degree grids. The coverage is from October 1992 to December 2010. These data were provided by AVISO (French space agency data provider) to support the CMIP5 (Coupled Model Intercomparison Project Phase 5) under the World Climate Research Program (WCRP) and was first made available via the JPL Earth System Grid. The dynamic topography are derived from sea surface height measured by several satellites including Envisat, TOPEX/Poseidon, Jason-1 and OSTM/Jason-2, and referenced to the geoid. Along with this dataset, two additional ancillary data files are included in the same directory which contain the number of observations and standard error co-located on the same 1 degree grids.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    POCLOUD Short Name: AVISO_L4_DYN_TOPO_1DEG_1MO Version ID: 1 Unique ID: C2617226203-POCLOUD

  • AVISO Level 4 Absolute Dynamic Topography for Climate Model Comparison Number of Observations

    https://cmr.earthdata.nasa.gov/search/concepts/C3234112266-POCLOUD.xml
    Description:

    These data are the numer of observations used to generate the AVISO Level 4 Absolute Dynamic Topography for Climate Model Comparison Number of Observations data set (PO.DAAC Drive at https://podaac-tools.jpl.nasa.gov/drive/files/allData/aviso/L4/abs_dynamic_topo ). This data set is not meant to be used alone, but with the absolute dynamic topography data. These data were generated to help support the CMIP5 (Coupled Model Intercomparison Project Phase 5) portion of PCMDI (Program for Climate Model Diagnosis and Intercomparison). The dynamic topograhy are from sea surface height measured by several satellites, Envisat, TOPEX/Poseidon, Jason-1 and OSTM/Jason-2 and referenced to the geoid. These data were provided by AVISO (French space agency data provider), which are based on a similar dynamic topography data set they already produce( http://www.aviso.oceanobs.com/index.php?id=1271 ).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    POCLOUD Short Name: AVISO_L4_DYN_TOPO_1DEG_1MO_NOB Version ID: 1 Unique ID: C3234112266-POCLOUD

  • AVISO Level 4 Absolute Dynamic Topography for Climate Model Comparison Standard Error

    https://cmr.earthdata.nasa.gov/search/concepts/C3234111485-POCLOUD.xml
    Description:

    These data are the standard error calculated from the AVISO Level 4 Absolute Dynamic Topography for Climate Model Comparison Number of Observations data set ( in PO.DAAC Drive at https://podaac-tools.jpl.nasa.gov/drive/files/allData/aviso/L4/abs_dynamic_topo ). This data set is not meant to be used alone, but with the absolute dynamic topography data. These data were generated to help support the CMIP5 (Coupled Model Intercomparison Project Phase 5) portion of PCMDI (Program for Climate Model Diagnosis and Intercomparison). The dynamic topograhy are from sea surface height measured by several satellites, Envisat, TOPEX/Poseidon, Jason-1 and OSTM/Jason-2 and referenced to the geoid. These data were provided by AVISO (French space agency data provider), which are based on a similar dynamic topography data set they already produce( http://www.aviso.oceanobs.com/index.php?id=1271 ).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    POCLOUD Short Name: AVISO_L4_DYN_TOPO_1DEG_1MO_ERR Version ID: 1 Unique ID: C3234111485-POCLOUD

  • BOREAS Follow-On DSP-04 1994 ERS-1 Level-4 Landscape Freeze/Thaw Maps, Ver. 1.0

    https://cmr.earthdata.nasa.gov/search/concepts/C2956500512-ORNL_CLOUD.xml
    Description:

    The BOREAS DSP-4 team acquired and analyzed imaging radar data from the ESA's ERS-1 over a complete annual cycle at the BOREAS sites in Canada in 1994 to detect shifts in radar backscatter related to varying environmental conditions. Two independent transitions correlating with snow melt and soil thaw onset, and possible canopy thaw were revealed by the data. The results demonstrated that radar provides an ability to observe thaw transitions at the beginning of the growing season, which in turn helps constrain the length of the growing season. The data presented here are gridded maps of landscape freeze/thaw state derived from backscatter change maps. The backscatter change maps were computed from radar backscatter images covering the southern BOREAS sites. The freeze/thaw classifications were determined through application of a change detection threshold based on temporal backscatter change relative to a winter-time frozen reference state. The data are provided as both ASCII text and as binary image (*.gif) format files.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 48 -111 60 -90

    ORNL_CLOUD Short Name: BFO_dsp04_ers_freeze-thaw_maps_590 Version ID: 1 Unique ID: C2956500512-ORNL_CLOUD

  • BOREAS RSS-17 1994 ERS-1 Level-3 Freeze/Thaw Backscatter Change Images

    https://cmr.earthdata.nasa.gov/search/concepts/C2929141520-ORNL_CLOUD.xml
    Description:

    The BOREAS RSS-17 team acquired and analyzed imaging radar data from the ESA's ERS-1 over a complete annual cycle at the BOREAS sites in Canada in 1994 to detect shifts in radar backscatter related to varying environmental conditions. Two independent transitions corresponding to soil thaw and possible canopy thaw were revealed by the data. The results demonstrated that radar provides an ability to observe thaw transitions at the beginning of the growing season, which in turn helps constrain the length of the growing season. The data set presented here includes change maps derived from radar backscatter images that were mosaicked together to cover the southern BOREAS sites. The image values used for calculating the changes are given relative to the reference mosaic image. Due to copyright issues, the 01-March-1994 reference image is not included on the CD-ROM and is not publically available. See the accompanying guide document for information about how to possibly acquire the data. The data are stored in binary image format files.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 50.09 -111 59.98 -93.5

    ORNL_CLOUD Short Name: rss17fth_484 Version ID: 1 Unique ID: C2929141520-ORNL_CLOUD