Neural networks as a tool for constructing continuous NDVI time series from AVHRR and MODIS

Neural Networks as a Tool for Constructing Continuous NDVI Time Series From AVHRR and MODIS

Alpine Grassland Phenology as Seen in AVHRR, VEGETATION, and MODIS NDVI Time Series - a Comparison with In Situ Measurements

This study evaluates the ability to track grassland growth phenology in the Swiss Alps with NOAA-16 Advanced Very High Resolution Radiometer (AVHRR) Normalized Difference Vegetation Index (NDVI) time series. Three growth parameters from 15 alpine and subalpine grassland sites were investigated between 2001 and 2005: Melt-Out (MO), Start Of Growth (SOG), and End Of Growth (EOG).We tried to estim...

Harmonic Analysis of Time-Series AVHRR NDVI Data

Harmonic analysis of a one-year time series (26 periods) of NOAA AVHRR NDVI biweekly composite data was used to characterize seasonal changes for natural and agricultural land uselland cover in Finney County in southwest Kansas. Different crops (corn, soybeans, alfalfa) exhibit distinctive seasonal patterns of NDVI variation that have strong periodic characteristics. Harmonic analysis, also ter...

SHORT COMMUNICATION MODIS NDVI Optimization To Fit the AVHRR Data Series—Spectral Considerations

In early 1999, about when this article will hit the press, INTRODUCTION NASA is scheduled to launch its first Earth Observing The physical and physiological parameters of vegetation satellite System (EOS) with array of instruments for pre(leaf area, biomass, physiological functioning, etc.) may cise, scientific, remote sensing of the Earth land, ocean, be obtained from satellite remote sensing....

Operational Drought Monitoring in Kenya Using MODIS NDVI Time Series

Reliable drought information is of utmost importance for efficient drought management. This paper presents a fully operational processing chain for mapping drought occurrence, extent and strength based on Moderate Resolution Imaging Spectroradiometer (MODIS) normalized difference vegetation index (NDVI) data at 250 m resolution. Illustrations are provided for the territory of Kenya. The process...