A Statistical Model for Estimating Midday NDVI from the Geostationary Operational Environmental Satellite (GOES) 16 and 17

The newest version of the Geostationary Operational Environmental Satellite series (GOES-16 and GOES-17) includes a near infrared band that allows for the calculation of normalized difference vegetation index (NDVI) at a 1 km at nadir spatial resolution every five minutes throughout the continental...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2019-11, Vol.11 (21), p.2507
Main Authors: Wheeler, Kathryn I., Dietze, Michael C.
Format: Article
Language:English
Subjects:
Aerosols
Atmospheric scattering
bayesian statistics
Bias
Clouds
Confidence intervals
Curve fitting
Diurnal
Estimates
geostationary operational environmental satellite
goes
GOES satellites
Mathematical models
ndvi
Noise
Noise sensitivity
Normalized difference vegetative index
Orbits
Remote sensing
Sensors
Spatial discrimination
Spatial resolution
Statistical analysis
Statistical models
Temporal resolution
Vegetation
Western Hemisphere
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Summary:The newest version of the Geostationary Operational Environmental Satellite series (GOES-16 and GOES-17) includes a near infrared band that allows for the calculation of normalized difference vegetation index (NDVI) at a 1 km at nadir spatial resolution every five minutes throughout the continental United States and every ten minutes for much of the western hemisphere. The usefulness of individual NDVI observations is limited due to the noise that remains even after cloud masks and data quality flags are applied, as much of this noise is negatively biased due to scattering within the atmosphere. Fortunately, high temporal resolution NDVI allows for the identification of consistent diurnal patterns. Here, we present a novel statistical model that utilizes this pattern, by fitting double exponential curves to the diurnal NDVI data, to provide a daily estimate of NDVI over forests that is less sensitive to noise by accounting for both random observation errors and atmospheric scattering biases. We fit this statistical model to 350 days of observations for fifteen deciduous broadleaf sites in the United States and compared the method to several simpler potential methods. Of the days 60% had more than ten observations and were able to be modeled via our methodology. Of the modeled days 72% produced daily NDVI estimates with
ISSN:2072-4292
2072-4292
DOI:10.3390/rs11212507