npphen: An R-Package for Detecting and Mapping Extreme Vegetation Anomalies Based on Remotely Sensed Phenological Variability. - Chávez, Roberto O.; Estay, Sergio A.; Lastra, José A.; Riquelme, Carlos G.; Olea, Matías; Aguayo, Javiera; Decuyper, Mathieu (Remote Sensing, 2023)