Number of seasonal cycles of vegetation at global scale AVHRR

<p>Using the AVHRR product provided by NOAA, the NDVI time series has been calculated, a periodogram has been made to study different factors that affect the periodicity of the vegetative cycles. In this case, the number of seasonal cycles of vegetation.</p> <p>Value 1: one cycle</p> <p>Value 2: two cycles</p> <p>Value 3: three cycles</p>