Task scheduling method of revisit tasks for satellite constellation
towards wildfire management
Abstract
Global warming increases forest wildfire risks to the economy,
environment, and human safety. Continuous satellite monitoring offers
accurate wildfire predictions and data-driven decision support. Earth
Observation Satellite Constellations(EOSC) enable periodic wildfire
tracking through revisit observations. Efficient scheduling of these
tasks is crucial for optimal constellation operation in wildfire
management. However, the existing EOSC scheduling algorithms rarely
concentrates on the scheduling of revisit tasks. In this paper, the
revisit task scheduling problem of the EOSC is expressed as a
multi-objective model. A time-driven multi-objective optimization
method(TDMO) is designed to optimize the constellation scheduling
process of wildfire observation tasks. TDMO has a time-driven feature
and coupled with revisit time in the task, experiments on different
scheduling scenarios show this method is effective in scheduling revisit
tasks towards wildfire targets.