HOTMAP: Global hot target detection at moderate spatial resolution

Author(s)

Murphy, Sam W. ^{[1, 2]} ; de Souza Filho, Carlos Roberto ^[1] ; Wright, Rob ^[2] ; Sabatino, Giovanni ^{[3, 4]} ; Pabon, Rosa Correa ^[1]

Affiliation

^[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

• Document type: Journal article
• Source: REMOTE SENSING OF ENVIRONMENT; v. 177, p. 78-88, MAY 2016.
• Web of Science Citations: 8

Abstract

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)

• FAPESP's process: 13/03711-5 - Global volcano monitoring using the next generation of orbital sensors with an emphasis on South America
• Grantee: Samuel William Murphy
• Support Opportunities: Scholarships in Brazil - Post-Doctoral