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## Autonomous Navigation System for Small Spacecrafts within a Cluster

Transactions of IAA RAS, issue 58, 24–29 (2021)

Keywords: small spacecraft, autonomous navigation, intersatellite measurements, optical-electronic device, star sensor

### Abstract

T. V. Danilova, M. A. Arkhipova, M. A. Maslova. Autonomous Navigation System for Small Spacecrafts within a Cluster // Transactions of IAA RAS. — 2021. — Issue 58. — P. 24–29. @article{danilova2021, abstract = {The purpose of this study is to develop an astronomical autonomous navigation system for small spacecrafts while a part of an orbital constellation called a cluster. The necessary condition is the presence of a spacecraft-leader in the cluster, whose orbit estimates are known with high accuracy. The functioning of the system is based on sighting of the spacecraft-leader in the optical-electronic device. The main tasks to be solved are the formation of measurers (optical-electronic device) composition, the development of the navigation vector function and the corresponding gradient matrix, the determination of the conditions for the functioning of the system, under which the accuracy of the generated navigation definitions reaches the level of accuracy of the sighted spacecraft-leader. The main research methods are the least square method and simulation modeling. In the process of creating a simulation model of the autonomous navigation system functioning traditional issues are solved that provide a solution of the navigation problem with iterative processing of measurement using the least square method and the formation of indicators for the navigation definitions accuracy. Also the original algorithms are developed that determine the method of navigation, which primarily include the formation of vectors of measured and calculated values of navigation parameters and the corresponding gradient matrix. Using the developed simulation model, two types of low-orbit spacecrafts clusters were investigated, for each a set of conditions was formed that provide a posteriori accuracy of the formed navigation field at the level of estimates errors of the spacecraft-leader orbit. The presented results have shown high accuracy characteristics of the considered navigation system, and consequently, the possibility of its use in onboard management systems of small spacecrafts within a cluster.}, author = {T.~V. Danilova and M.~A. Arkhipova and M.~A. Maslova}, doi = {10.32876/ApplAstron.58.24-29}, issue = {58}, journal = {Transactions of IAA RAS}, keyword = {small spacecraft, autonomous navigation, intersatellite measurements, optical-electronic device, star sensor}, pages = {24--29}, title = {Autonomous Navigation System for Small Spacecrafts within a Cluster}, url = {http://iaaras.ru/en/library/paper/2094/}, year = {2021} } TY - JOUR TI - Autonomous Navigation System for Small Spacecrafts within a Cluster AU - Danilova, T. V. AU - Arkhipova, M. A. AU - Maslova, M. A. PY - 2021 T2 - Transactions of IAA RAS IS - 58 SP - 24 AB - The purpose of this study is to develop an astronomical autonomous navigation system for small spacecrafts while a part of an orbital constellation called a cluster. The necessary condition is the presence of a spacecraft-leader in the cluster, whose orbit estimates are known with high accuracy. The functioning of the system is based on sighting of the spacecraft-leader in the optical-electronic device. The main tasks to be solved are the formation of measurers (optical-electronic device) composition, the development of the navigation vector function and the corresponding gradient matrix, the determination of the conditions for the functioning of the system, under which the accuracy of the generated navigation definitions reaches the level of accuracy of the sighted spacecraft-leader. The main research methods are the least square method and simulation modeling. In the process of creating a simulation model of the autonomous navigation system functioning traditional issues are solved that provide a solution of the navigation problem with iterative processing of measurement using the least square method and the formation of indicators for the navigation definitions accuracy. Also the original algorithms are developed that determine the method of navigation, which primarily include the formation of vectors of measured and calculated values of navigation parameters and the corresponding gradient matrix. Using the developed simulation model, two types of low-orbit spacecrafts clusters were investigated, for each a set of conditions was formed that provide a posteriori accuracy of the formed navigation field at the level of estimates errors of the spacecraft-leader orbit. The presented results have shown high accuracy characteristics of the considered navigation system, and consequently, the possibility of its use in onboard management systems of small spacecrafts within a cluster. DO - 10.32876/ApplAstron.58.24-29 UR - http://iaaras.ru/en/library/paper/2094/ ER -