TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION
ABSTRACT: The measurements obtained by remote sensing are influenced by issues related to relief. Based on that, this paper aims to analyze the spatial and temporal dynamics of the net radiation (Rn), considering the influence of topographic parameters on it, in Edgárdia Experimental Farm (FEE). It...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Engenharia Agrícola
2017-09-01
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| Series: | Engenharia Agrícola |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000501028&tlng=en |
| _version_ | 1819284515992895488 |
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| author | Roberto Filgueiras Donizeti A. P. Nicolete Tânia M. de Carvalho Antonio R. da Cunha Célia R. L. Zimback |
| author_facet | Roberto Filgueiras Donizeti A. P. Nicolete Tânia M. de Carvalho Antonio R. da Cunha Célia R. L. Zimback |
| author_sort | Roberto Filgueiras |
| collection | DOAJ |
| description | ABSTRACT: The measurements obtained by remote sensing are influenced by issues related to relief. Based on that, this paper aims to analyze the spatial and temporal dynamics of the net radiation (Rn), considering the influence of topographic parameters on it, in Edgárdia Experimental Farm (FEE). It was used the methodology based on the SEBAL algorithm (Surface Energy Balance Algorithm for Land) to estimate the net radiation by orbital images. In order to assess the topographic influence on the computing of net radiation, three methodologies were applied: without topographic correction (RnSem), cosine correction (RnCos) and C correction (RnC). These methodologies were applied on 21 images of the orbital platform Landsat-5/TM, from 1985 up to 2010. Due to the complex relief of the FEE, the cosine correction did not show effectiveness on the attenuation of topographic influence. For the values of RnC, we noticed an average reduction of 5.97% for the standard deviation, relative to the images without correction. These results show the importance of considering the relief, to achieve higher accuracies on the estimation of biophysical parameters with orbital images. |
| first_indexed | 2024-12-24T01:48:37Z |
| format | Article |
| id | doaj.art-4020c07ee6f8464b9795a78b6a6e858b |
| institution | Directory Open Access Journal |
| issn | 0100-6916 |
| language | English |
| last_indexed | 2024-12-24T01:48:37Z |
| publishDate | 2017-09-01 |
| publisher | Sociedade Brasileira de Engenharia Agrícola |
| record_format | Article |
| series | Engenharia Agrícola |
| spelling | doaj.art-4020c07ee6f8464b9795a78b6a6e858b2022-12-21T17:21:48ZengSociedade Brasileira de Engenharia AgrícolaEngenharia Agrícola0100-69162017-09-013751028104010.1590/1809-4430-eng.agric.v37n5p1028-1040/2017TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATIONRoberto FilgueirasDonizeti A. P. NicoleteTânia M. de CarvalhoAntonio R. da CunhaCélia R. L. ZimbackABSTRACT: The measurements obtained by remote sensing are influenced by issues related to relief. Based on that, this paper aims to analyze the spatial and temporal dynamics of the net radiation (Rn), considering the influence of topographic parameters on it, in Edgárdia Experimental Farm (FEE). It was used the methodology based on the SEBAL algorithm (Surface Energy Balance Algorithm for Land) to estimate the net radiation by orbital images. In order to assess the topographic influence on the computing of net radiation, three methodologies were applied: without topographic correction (RnSem), cosine correction (RnCos) and C correction (RnC). These methodologies were applied on 21 images of the orbital platform Landsat-5/TM, from 1985 up to 2010. Due to the complex relief of the FEE, the cosine correction did not show effectiveness on the attenuation of topographic influence. For the values of RnC, we noticed an average reduction of 5.97% for the standard deviation, relative to the images without correction. These results show the importance of considering the relief, to achieve higher accuracies on the estimation of biophysical parameters with orbital images.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000501028&tlng=entopographic correctionSEBALbiophysical parameters |
| spellingShingle | Roberto Filgueiras Donizeti A. P. Nicolete Tânia M. de Carvalho Antonio R. da Cunha Célia R. L. Zimback TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION Engenharia Agrícola topographic correction SEBAL biophysical parameters |
| title | TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION |
| title_full | TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION |
| title_fullStr | TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION |
| title_full_unstemmed | TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION |
| title_short | TOPOGRAPHIC ASPECTS IN THE SPATIAL AND TEMPORAL DYNAMIC OF NET RADIATION |
| title_sort | topographic aspects in the spatial and temporal dynamic of net radiation |
| topic | topographic correction SEBAL biophysical parameters |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000501028&tlng=en |
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