Santos, Carlos Antonio Costa DosWanderley, Raianny L. NascimentoAraújo, Argemiro LucenaBezerra, Bergson Guedes2018-07-272018-07-272014SANTOS, Carlos Antonio Costa Dos; WANDERLEY, Raianny L. Nascimento; ARAÚJO, Argemiro Lucena; BEZERRA, Bergson Guedes, Obtenção do saldo de radiação em áreas de pastagem e floresta na amazônia (estação seca) através do sensor MODIS. Revista Brasileira de Meteorologia, v. 29, p. 420-432, 2014. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-77862014000300010&lng=pt&tlng=pt> Acesso em: 19 abr. 2018.https://repositorio.ufrn.br/jspui/handle/123456789/25615OBTAINING THE NET RADIATION IN PASTURES AND FOREST AREAS IN AMAZON (DRY SEASON) BY THE MODIS SENSOR The main objective of this study was to analyze comparatively the estimate of net radiation at surface (Rn) from orbital images with surface measured data as well as the components of Rn, for two different types of vegetation (pasture and forest) under tropical-humid climate. This study was conducted at Rondônia State in northwestern Brazil. To carry out the analysis using remote sensing techniques seven orbital images of MODIS sensor aboard the Aqua satellite were used for the algorithm implementation, and the measured surface data at two micrometeorological towers installed in the pasture and forest locations. The main results obtained from MODIS images show consistent maximum and minimum percentage error (PE) for Rn , 3% and 0.02% for the forest area and 10% and 0.7% for the pasture area. These results show that remote sensing is an important and effective tool in environmental and hydrological studies.porAcesso AbertoSensoriamento remotoMicrometeorologiaSEBALBalanço de radiaçãoarticlehttp://dx.doi.org/10.1590/0102-778620130591