Scheduling an Agile Earth Observation Satellite with a Defined Mission Using Discrete Event Supervisory Control

Afzali, Arda; Ghorbani Vaghei, Bahman

doi:10.22034/jssta.2023.375570.1103

Document Type : Original Article

Authors

¹ New Technologies Department, Iran University of Science and Technology, Tehran, Iran

² Advance Technology Department/ Iran University of Science and Technology

https://doi.org/10.22034/jssta.2023.375570.1103

Abstract

Finding the best possible scheduling to maximize observations and transfer them to the ground station as a function of satellite characteristics, orbital mechanics, attitude control system, field of view and observational objectives, is very important. The combination of the agility of the satellite with regard to the ability to quick maneuver along the three axes of roll, pitch and yaw, with a suitable software can significantly improve the response rate, revisit time and satellite coverage and respond to users’ needs. In this regard, the design of a comprehensive scheduling that automatically creates an optimal operational sequence for the maximum utilization of agile Earth observation satellites during a certain period of time in order to respond to the needs and priorities of the users and to satisfy the operational limitations of the satellites. Therefore, in this article, the design of an automatic software for scheduling Earth observation satellites is presented, which after receiving observational targets from the user and assigning observation priority to each task, the ability to implement and execute observation tasks is checked by the attitude control subsystem to satisfy the attitude maneuver limit around the roll and pitch axes and orbital mechanics subsystem to satisfy the target access time window limit. Then, by using discrete event supervisory control, constraints are applied to the transfer system to add specific features and requirements to the mission. With the help of an optimal search algorithm based on the Bellman-Ford method, the optimal program sequence for the maximum use of the satellite while meeting the operational limitations of the mission is obtained automatically. Finally, a remote sensing mission is simulated to demonstrate the planned verification

Keywords

Earth observation# Agile satellite# Scheduling# Discrete event supervisory control

20.1001.1.27834557.1402.3.1.4.3

Main Subjects

Telecommunication

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Space Science, Technology and Applications

Scheduling an Agile Earth Observation Satellite with a Defined Mission Using Discrete Event Supervisory Control

References

References

Volume 3, Issue 1
August 2023
Pages 35-47

Scheduling an Agile Earth Observation Satellite with a Defined Mission Using Discrete Event Supervisory Control

References

References

Volume 3, Issue 1August 2023Pages 35-47

Volume 3, Issue 1
August 2023
Pages 35-47