Normalized Difference Vegetation Index (NDVI) - NASA Earthdata Vegetation indices are used to remotely examine vegetation over a given area One commonly-used index is the Normalized Difference Vegetation Index (NDVI), which uses the difference between near-infrared (NIR) and red reflectance from the Earth's surface, divided by their sum In healthy photosynthesizing plants, chlorophyll - the main pigment involved in photosynthesis - strongly reflects NIR
Vegetation Index - NASA Earthdata Vegetation indices measure the amount of green vegetation over a given area and can be used to assess vegetation health NASA’s Earth-observing satellites collect several different vegetation indices, including Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Leaf Area Index (LAI), and Fraction of Photosynthetically Active Radiation (FPAR)
Use Remote Sensing Data to Study Vegetation Dynamics Overview Remote sensing data can be used to study vegetation dynamics, such as plant healthiness Like all objects, plants have unique spectral characteristics, and this information can be interpreted from remote sensing data to determine a plant’s condition
MODIS Terra Vegetation Continuous Fields Yearly L3 Global . . . - Earthdata The MOD44B Version 6 Vegetation Continuous Fields (VCF) yearly product is a global representation of surface vegetation cover as gradations of three ground cover components: percent tree cover, percent non-tree cover, and percent non-vegetated (bare) VCF products provide a continuous, quantitative portrayal of land surface cover at 250 meter (m) pixel resolution, with a sub-pixel depiction of
Global Vegetation Greenness (NDVI) from AVHRR GIMMS-3G+, 1981-2022 Description This dataset holds the Global Inventory Modeling and Mapping Studies-3rd Generation V1 2 (GIMMS-3G+) data for the Normalized Difference Vegetation Index (NDVI) NDVI was based on corrected and calibrated measurements from Advanced Very High Resolution Radiometer (AVHRR) data with a spatial resolution of 0 0833 degree and global coverage for 1982 to 2022 Maximum NDVI values are
Vegetation Near Real-Time Data - NASA Earthdata Near real-time data provided by NASA's Land, Atmosphere Near real-time Capability for Earth observation (LANCE) can be used to monitor vegetation and crop conditions
Synthetic Aperture Radar (SAR) - NASA Earthdata What is Synthetic Aperture Radar? Synthetic aperture radar (SAR) is a type of active data collection where an instrument sends out a pulse of energy and then records the amount of that energy reflected back after it interacts with Earth Unlike optical imagery, which is a passive data collection technique based on emitted energy, SAR imagery is created from the reaction of an emitted pulse of
Solar Induced Fluorescence (SIF) Observations for Assessing Vegetation . . . Solar Induced Fluorescence (SIF) Observations for Assessing Vegetation Changes Related to Floods, Drought, and Fire Impacts This ARSET training discusses the use of a remote sensing measure of photosynthesis to study the impact of extreme weather on cropland and ecosystems
HLS Operational Land Imager Vegetation Indices Daily Global . . . - Earthdata Vegetation indices combine specific bands of satellite data to quantify various aspects of vegetation Analysis of vegetation indices allows for tracking changes in vegetation over time, identifying areas of stress or deforestation, and assessing crop health
Harmonized Landsat and Sentinel-2 Vegetation Indices (HLS-VI) Data . . . The Land Processes Distributed Active Archive Center (LP DAAC) announced the release of the Harmonized Landsat and Sentinel-2 Vegetation Indices (HLS-VI) data products These new HLS-derived datasets provide vegetation data from the Operational Land Imager (OLI) aboard the joint NASA USGS Landsat 8 and 9 satellites and the Multi-Spectral Instrument (MSI) aboard the European Space Agency (ESA