Proceedings of the Estonian Academy of Sciences, 2014
ABSTRACT This paper presents the design, implementation, and pre-launch test results of the Comma... more ABSTRACT This paper presents the design, implementation, and pre-launch test results of the Command and Data Handling Subsystem (CDHS) for ESTCube-1. ESTCube-1 is a one-unit Cube Sat, which will perform an electric solar wind sail experiment. The development process of the CDHS for ESTCube-1 was focused on robustness and fault tolerance. A combination of hot and cold hardware redundancy was implemented. Software, including a custom-written internal communications protocol, was designed to increase the system's fault tolerance further by providing fault detection and fall-back procedures. Tests were carried out to validate the implementation's performance and physical endurance. The final CDHS design is operational within the set requirements. Tests that verify fault tolerance of the system in orbit are suggested.
ESTCube-1 is a one-unit CubeSat that has been in orbit since May 2013. It was launched to a Sun-s... more ESTCube-1 is a one-unit CubeSat that has been in orbit since May 2013. It was launched to a Sun-synchronous 670 km altitude polar low Earth orbit, and its primary mission objective was to centrifugally deploy a tether as a part of the first in-orbit demonstration of electric solar wind sail (E-sail) technology. The electrical power system, the communication system and the command and data handling system remain fully functional after almost two years in orbit. The camera, developed to image the end-mass of the tether, has taken more than 270 images for camera characterization, for validating the attitude determination system, and for public outreach purposes. The attitude determination accuracy is better than 1.5°, and the attitude control system is able to spin up the satellite to more than two rotations per second around an axis that suits the E-sail experiment. In this article, we present our in-orbit experience of operating and preparing the satellite for the experiment, as well...
Proceedings of the Estonian Academy of Sciences, 2014
ABSTRACT This paper presents the design, implementation, and pre-launch test results of the Comma... more ABSTRACT This paper presents the design, implementation, and pre-launch test results of the Command and Data Handling Subsystem (CDHS) for ESTCube-1. ESTCube-1 is a one-unit Cube Sat, which will perform an electric solar wind sail experiment. The development process of the CDHS for ESTCube-1 was focused on robustness and fault tolerance. A combination of hot and cold hardware redundancy was implemented. Software, including a custom-written internal communications protocol, was designed to increase the system's fault tolerance further by providing fault detection and fall-back procedures. Tests were carried out to validate the implementation's performance and physical endurance. The final CDHS design is operational within the set requirements. Tests that verify fault tolerance of the system in orbit are suggested.
ESTCube-1 is a one-unit CubeSat that has been in orbit since May 2013. It was launched to a Sun-s... more ESTCube-1 is a one-unit CubeSat that has been in orbit since May 2013. It was launched to a Sun-synchronous 670 km altitude polar low Earth orbit, and its primary mission objective was to centrifugally deploy a tether as a part of the first in-orbit demonstration of electric solar wind sail (E-sail) technology. The electrical power system, the communication system and the command and data handling system remain fully functional after almost two years in orbit. The camera, developed to image the end-mass of the tether, has taken more than 270 images for camera characterization, for validating the attitude determination system, and for public outreach purposes. The attitude determination accuracy is better than 1.5°, and the attitude control system is able to spin up the satellite to more than two rotations per second around an axis that suits the E-sail experiment. In this article, we present our in-orbit experience of operating and preparing the satellite for the experiment, as well...
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Papers by Henri Kuuste