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Technical Note

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

Department of Earth and Environment, Boston University, Boston, MA, 02215, USA
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Remote Sens. 2019, 11(21), 2507; https://doi.org/10.3390/rs11212507
Received: 15 September 2019 / Revised: 23 October 2019 / Accepted: 24 October 2019 / Published: 26 October 2019
(This article belongs to the Special Issue Earth Monitoring from A New Generation of Geostationary Satellites)
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 <0.1 wide 95% confidence intervals. Of the modeled days 13% were able to provide a confident NDVI value even if there were less than five observations between 10:00–14:00. This methodology provides estimates for daily midday NDVI values with robust uncertainty estimates, even in the face of biased errors and missing midday observations. View Full-Text
Keywords: NDVI; GOES; Geostationary Operational Environmental Satellite; Bayesian statistics NDVI; GOES; Geostationary Operational Environmental Satellite; Bayesian statistics
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MDPI and ACS Style

Wheeler, K.I.; Dietze, M.C. A Statistical Model for Estimating Midday NDVI from the Geostationary Operational Environmental Satellite (GOES) 16 and 17. Remote Sens. 2019, 11, 2507. https://doi.org/10.3390/rs11212507

AMA Style

Wheeler KI, Dietze MC. A Statistical Model for Estimating Midday NDVI from the Geostationary Operational Environmental Satellite (GOES) 16 and 17. Remote Sensing. 2019; 11(21):2507. https://doi.org/10.3390/rs11212507

Chicago/Turabian Style

Wheeler, Kathryn I., and Michael C. Dietze. 2019. "A Statistical Model for Estimating Midday NDVI from the Geostationary Operational Environmental Satellite (GOES) 16 and 17" Remote Sensing 11, no. 21: 2507. https://doi.org/10.3390/rs11212507

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