Abstract
Abstract. Geohazard emergency response is a disaster event management act that is multifactorial, time critical, task intensive and socially significant. To improve the rationalization and standardization of space–air–ground remote sensing collaborative observations in geohazard emergency responses, this paper comprehensively analyzes the technical resources of remote sensors and emergency service systems and establishes a database of technical and service evaluation indexes using MySQL (Structured Query Language). Based on the database, we propose the method of using the technique for order preference by similarity to an ideal solution (TOPSIS) and a Bayesian network to evaluate the synergistic observation effectiveness and service capability of remote sensing technology in geohazard emergency response, respectively. We demonstrate through experiments that using this evaluation can effectively grasp the operation and task completion of remote sensing cooperative technology in geohazard emergency response. This provides a decision basis for the synergistic planning work of heterogeneous sensors in geohazard emergency response.
Highlights
Geohazards include earthquakes, landslides, debris flows, ground subsidence, lava flows and other hazards related to geological processes that endanger people’s lives and property and are caused by natural factors or human activities
According to the United Nations Office for Disaster Risk Reduction (UNDRR), the human casualties caused by geological hazards since 1990 have been concentrated in the AsiaPacific region and Africa for a long time, with 2010–2019 being the decade with the highest economic losses caused by disasters (UNDRR, 2019a, b)
In order to improve the scientific nature of the evaluation and make full use of the advantages of various methods, TOPSIS and Bayesian-network-based evaluation methods are used for remote sensing collaborative observation and service capability, respectively, while rank sum ratio (RSR) is used to determine the weights in TOPSIS calculation
Summary
Geohazards include earthquakes, landslides, debris flows, ground subsidence, lava flows and other hazards related to geological processes that endanger people’s lives and property and are caused by natural factors or human activities. Earth observation technology provides key technical support during geohazard emergency response (Butler, 2005). With the development of global Earth observation technology, the performance of remote sensing technology is constantly improving; the number of sensors continues to increase; and a multiplatform observation system for satellites, aerials, unmanned aerial systems (UASs) and the ground has gradually been established (Toth and Józków, 2016). The Committee on Earth Observation Satellites (CEOS) Missions, Instruments, and Measurements (MIM) Database is divided into Agencies, Missions, Instruments, Measurement and Datasets modules with a focus on current and future satellites, sensors and measurement capabilities (CEOS, 2020). The Observing Systems Capability Analysis and Review tool (OSCAR, 2020) database is divided into a description of information about the satellite and its sensors and a sensor capability assessment analysis
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