Vegetation Index and Phenology (VIP) Vegetation Indices 15Days Global 0.05Deg CMG V004

Description

The NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) (https://earthdata.nasa.gov/community/community-data-system-programs/measures-projects) Vegetation Index and Phenology (VIP) global datasets were created using Advanced Very High Resolution Radiometer (AVHRR) N07, N09, N11, and N14 datasets (1981 - 1999) and Moderate Resolution Imaging Spectroradiometer (MODIS)/Terra MOD09 surface reflectance data (2000 - 2014). The VIP Vegetation Index (VI) product was developed to provide consistent measurements of the Normalized Difference Vegetation Index (NDVI) and modified Enhanced Vegetation Index (EVI2) spanning more than 30 years of data from multiple sensors. The EVI2 is a backward extension of AVHRR. Vegetation indices such as NDVI and EVI2 are useful for assessing the biophysical properties of the land surface, and are used to characterize vegetation phenology. Phenology tracks the seasonal life cycle of vegetation, and provides information on the biotic response to environmental changes. The VIP15 VI data product is provided twice monthly at 0.05 degree (5600 meter (m)) spatial resolution in geographic (Lat/Lon) grid format. The data are stored in Hierarchical Data Format-Earth Observing System (HDF-EOS) file format. The VIP15 VI product contains 12 Science Datasets (SDS) which include the calculated VIs (NDVI and EVI2) as well as quality assurance/pixel reliability, the input Visible/Near Infrared (VNIR) surface reflectance data, and viewing geometry. The Blue and Middle Infrared (MIR) surface reflectance data are only available for the MODIS era (2000 - 2014). Gaps in the daily product are filled using long term mean VI records derived from the more than 30 year time series of data, and are indicated as gap-filled in the Pixel Reliability SDS. A low resolution browse image showing NDVI as a color map is also available. The VIP15 dataset includes two composites per month. The first composite is generated from day 1 to 15, and the second composite includes the remaining days of the month. This dataset consists of 24 files per year.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FMEASURES%2FVIP%2FVIP15.004
21 The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc. https://doi.org/10.5067/MEaSUREs/VIP/VIP15.004
20 LP DAAC Data Pool provides direct access to available products via HTTPS. https://e4ftl01.cr.usgs.gov/MEASURES/VIP15.004/
20 Earthdata Search Client allows users to search, discover, visualize, refine, and access NASA Earth Observation data. https://search.earthdata.nasa.gov/search?q=C1328419482-LPDAAC_ECS
21 The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products. https://lpdaac.usgs.gov/
33 The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. https://lpdaac.usgs.gov/documents/178/VIP_User_Guide_ATBD_V4.pdf
21 Additional project information is available from the VIP Lab at the University of Arizona. https://vip.arizona.edu/index.php
21 Access data via Open-source Project for a Network Data Access Protocol. https://opendap.cr.usgs.gov/opendap/hyrax/DP109/VIP/VIP15.004/contents.html
22 Browse image for Earthdata Search https://e4ftl01.cr.usgs.gov/WORKING/BRWS/Browse.001/2016.09.17/VIP15.A2014075.004.2016170154937.jpg

Tags

  • climate-indicators
  • biosphere
  • national-geospatial-data-asset
  • ngda
  • biospheric-indicators
  • vegetation
  • earth-science

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