Do Agrometeorological Data Improve Optical Satellite-Based Estimations of the Herbaceous Yield in Sahelian Semi-Arid Ecosystems? - Abdoul Aziz Diouf; Pierre Hiernaux; Martin Brandt; Gayane Faye; Bakary Djaby; Mouhamadou Bamba Diop; Jacques André Ndione; Bernard Tychon (Remote. Sens., 2016)