| Texto completo | |
| Autor(es): |
Murphy, Sam W.
[1, 2]
;
de Souza Filho, Carlos Roberto
[1]
;
Wright, Rob
[2]
;
Sabatino, Giovanni
[3, 4]
;
Pabon, Rosa Correa
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Campinas UNICAMP, Campinas, SP - Brazil
[2] Univ Hawaii Manoa, Honolulu, HI 96822 - USA
[3] ESA, RSS, Rome - Italy
[4] Progress Syst Srl, Florence - Italy
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | REMOTE SENSING OF ENVIRONMENT; v. 177, p. 78-88, MAY 2016. |
| Citações Web of Science: | 8 |
| Resumo | |
Imagery from polar orbiting satellites can be used to mitigate global hazards from wildfires and volcanoes. An incipient constellation of moderate spatial resolution sensors (i.e. Landsat 8 and Sentinel 2) will provide an unprecedented combined spatial and temporal resolution of imagery with 20 to 30 m pixels and a revisit period of 2 to 4 days. This data stream could provide an invaluable contribution to existing hot target monitoring systems. We developed hot target detection algorithms for both daytime and nighttime imagery using Landsat 8 data. Performance was compared to existing state-of-the-art methods for daytime detection using a global database of active wildfires. The new approach was able to detect 80% of hot pixels (i.e. compared to 50 to 80% detected by the previous approaches) with a low false alarm rate (i.e. <10%) and fast processing speed (i.e. orders of magnitude faster than one of the previous approaches). The new detection algorithms put forward here could form the basis of the first, moderate spatial resolution, global hot target detection system. This vision is currently being realized through development of the Hotmap software within the Grid Processing on Demand (G-POD) environment of the European Space Agency (ESA). (C) 2016 Elsevier Inc. All rights reserved. (AU) | |
| Processo FAPESP: | 13/03711-5 - Monitoramento global de vulcões com enfase na América do Sul utilizando a próxima geração de sensores orbitais |
| Beneficiário: | Samuel William Murphy |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |