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  2. EOSDIS Data News - 06/22/2018

EOSDIS Data News - 06/22/2018

ASDC

NASA's Atmospheric Science Data Center (ASDC) and Boston University announce the public release of Vegetation Earth System Data Record (VESDR) derived from the Earth Polychromatic Imaging Camera (EPIC) onboard the Deep Space Climate Observatory (DSCOVR). The VESDR product contains Leaf Area Index (LAI) and diurnal courses of Normalized Difference Vegetation Index (NDVI), Sunlit Leaf Area Index (SLAI), Fraction of incident Photosynthetically Active Radiation (400-70 nm) absorbed by the vegetation (FPAR) and Directional Area Scattering Function (DASF). The parameters are distributed at 10 km sinusoidal grid and 65 to 110-minute temporal frequency.

FPAR, LAI, SLAI are useful for monitoring variability and change in global vegetation due to climate and anthropogenic influences, modeling climate, carbon and water cycles, and improving forecasting of near surface weather. DASF provides information critical to accounting for structural contributions to measurements of leaf biochemistry from remote sensing. Whereas LAI is a standard product of many satellite missions, diurnal courses of global FPAR, NDVI, SLAI and DASF are new satellite derived products.

We also provide two ancillary science data products, namely, 10 km Land Cover Type and Distribution of Land Cover Types within 10 km pixel. These products were derived from 500m MODIS land cover type 3 product (MCDLCHKM), which was generated from 2008, 2009 and 2010 land cover products (MCD12Q1, v051). Information about these products, details about product quality, and mechanisms to access the data can be found under DSCOVR Data and Information at the ASDC website: https://doi.org/10.5067/EPIC/DSCOVR/L2_VESDR.001

ASDC, in collaboration with the Clouds and the Earth’s Radiant Energy System (CERES) Science Team, announces the release of the first Joint Polar Satellite System 1 (JPSS-1) data sets: They are the following:

  • The BDS data product is a Level-1B product that contains a 24-hour, single-satellite, single-instrument, geolocated TOA filtered radiances and other instrument data.
  • The ES-8 data product is a Level-2 product that contains a 24-hour, single-satellite, single-instrument, instantaneous view of scanner fluxes at the TOA reduced from spacecraft altitude unfiltered radiances using the ERBE scanner Inversion algorithms and the ERBE shortwave and longwave ADMs.
  • The ES-4 data product is a Level-3 product that are TOA fluxes using algorithms identical to those used by ERBE, averaged regionally (2.5-degree, 5-degree, and 10-degree grid), zonally (2.5-degree, 5-degree, and 10-degree) and globally.
  • The ES-9 data product is a Level-3 product that are TOA fluxes using algorithms identical to those used by ERBE, regional averages of instantaneous footprint TOA fluxes only for the hours of satellite overpass (from ES-8 Level 2 product).
  • The CERES FM6 instrument now has a Longwave channel instead of the Window channel that previous instruments had. Additional information about the CERES products, including products available, documentation, relevant links, sample software, tools for working with the data, etc. can be found at the CERES data table: http://eosweb.larc.nasa.gov/project/ceres/ceres_table

GHRC DAAC

NASA's Global Hydrology Resource Center (GHRC) Distributed Active Archive Center (DAAC) published version-2 of the GPM Ground Validation Airborne Precipitation Radar 3rd Generation (APR-3) OLYMPEX V2 dataset. This dataset was collected from November 12, 2015 to December 19, 2015 during the GPM Ground Validation Olympic Mountains Experiment (OLYMPEX) field campaign held in the Pacific Northwest. The APR-3 is an enhanced and upgraded radar with W-band measurement capability, and is related to the APR-2 instrument used in previous GPM Ground Validation field campaigns. The APR-3 scans cross-track from +/- 25° to the right and left of nadir making Ku-band, Ka-band, and W-band frequency Doppler measurements from the DC-8 aircraft at a typical altitude of 10 km. Data files are in HDF-5 format with JPG format browse images. The data files contain radar reflectivity, Doppler velocity for all bands, linear depolarization ratios at Ku-band, and normalized radar cross section measurements at Ka and Ku-bands. Please note this is Version 2, replacing the previously published APR-3 data at GHRC.

GHRC DAAC published the GPM Ground Validation Microwave Atmospheric Sounder on Cubesat (MASC) OLYMPEX dataset which consists of microwave radiance measurements collected during the GPM Ground Validation Olympic Mountains Experiment (OLYMPEX) field campaign held in the Pacific Northwest. These data were collected by MASC aboard the NASA DC-8 aircraft which flew on selected dates during the intensive operational period of OLYMPEX between November 10, 2016 and December 13, 2016. The data are provided in HDF-EOS5 format.

NSIDC DAAC

NASA's National Snow and Ice Data Center (NSIDC) DAAC published Version 1.3 of the dataset MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 for all remaining ensors. The changes in this minor version update vary depending on the sensor and are listed by sensor in Table 11 of the user guide. This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

NSIDC DAAC has published Version 2 of the dataset SMAP/Sentinel-1 L2 Radiometer/Radar 30-Second Scene 3 km EASE-Grid Soil Moisture produced by the SMAP Science Data System (SDS). This dataset uses SMAP L-band brightness temperatures and Copernicus Sentinel-1 C-band backscatter coefficients to derive soil moisture data, which are then resampled to an Earth-fixed, cylindrical 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0).Version changes include: Fewer spurious sigma0 values caused by small man-made structures. Replaced the previous 3 km resolution urban fraction map with a new 1 km resolution map.

NSIDC DAAC has published reprocessed AMSR-E/AMSR2 Unified L2B Half-Orbit 25 km EASE-Grid Surface Soil Moisture, Version 1 for all data from 2 July 2012 to present. The Beta 02 (B02) algorithm update corrects an error that caused only half of each swath to be processed. This data set includes surface soil moisture estimates derived from L1R brightness. temperatures from AMSR2.

SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update, Version 4 (SPL4SMAU)

SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data, Version 4 (SPL4SMGP)

SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constraints, Version 4 (SPL4SMLM)

SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 4 (SPL4CMDL)

Version changes include:

  • SPL4SMAU, SPL4SMGP, & SPL4SMLM: Land surface modeling system improvements. In addition, data is more CF compliant with the addition of x and y coordinate variables as well as an EASE Grid 2.0 projection mapping variable, which improves interoperability with ArcGIS, QGIS, OPeNDAP, and programmatic access.
  • SPL4CMDL: Improvements in model inputs and ancillary files resulting in better RMSE, especially for drier sites.

NSIDC DAAC has published the dataset High Mountain Asia ASCAT Freeze/Thaw/Melt Status. This Level-3 dataset provides freeze/thaw/melt status over seasonally frozen land and snowmelt status over glaciated areas for high mountain Asia glacier and snow regions. Daily F/T/M status is derived from vertically polarized (V-pol), C-band (5.255 GHz) Advanced Scatterometer (ASCAT Metop-A and Metop-B) backscatter measurements. This dataset is being made available with minimal documentation as part of an early release. NSIDC DAAC will provide an increased level of support and more detailed documentation in the future.

NSIDC DAAC has published data through 20 September 2017 for the data set IceBridge LVIS L2 Geolocated Surface Elevation Product. This dataset contains surface elevation measurements from NASA’s Land, Vegetation, and Ice Sensor (LVIS) over areas including Greenland, Alaska, and Antarctica. The data were collected as part of NASA Operation IceBridge funded campaigns.

NSIDC DAAC has published data through 20 September 2017 for the data set IceBridge LVIS L1B Geolocated Return Energy Waveforms. This dataset contains laser altimetry return energy waveform measurements taken from NASA’s Land, Vegetation, and Ice Sensor (LVIS) over areas including Greenland, Alaska, and Antarctica. The data were collected as part of Operation IceBridge funded campaigns.

NSIDC DAAC has published the dataset SnowEx17 Time Series Sonic Snow Depth Measurement. This dataset contains 15-min snow depth observations for two study sites on Grand Mesa, CO, USA, acquired as part of NASA’s 2017 SnowEx campaign. The data were recorded using two arrays of Judd Communications Ultrasonic Depth Sensors, positioned to represent three primary vegetation conditions: open-canopy; canopy-edge; and closed-canopy. This dataset is being made available with minimal documentation as part of an early release. NSIDC DAAC will provide an increased level of support and more detailed documentation in the future.

NSIDC DAAC has published the dataset SnowEx17 Ground-Based UWScat Ku- and X-Band Frequency Modulated Continuous Wave Radar. This dataset consists of ground-based scatterometer data acquired during the SnowEx 2017 campaign at Grand Mesa, Colorado, USA, a snow-covered, forested study site about 40 miles east of the city of Grand Junction, CO. The data comprise operational parameters used during data acquisition, Mueller matrices for each acquisition, and the nearfield-corrected normalized radar cross section (NRCS) in VV, VH, HV, and HH polarizations. Range profile data are also provided for each scan which report the raw power returned as a function of range from the antenna. This dataset is being made available with minimal documentation as part of an early release. NSIDC DAAC will provide an increased level of support and more detailed documentation in the future.

Last Updated: Jul 19, 2018 at 3:18 PM EDT