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## An Autonomous Method to Calculate Spacecraft Orbit and Orientation Parameters in Absence of a priori Information

Transactions of IAA RAS, issue 38, 38–43 (2016)

Keywords: autonomous navigation and orientation, astronomical distant measurement, axis hodograph, optical electronic device, recognition of stars.

### Abstract

An autonomous method is proposed to estimate osculation orbit elements and orientation parameters of a spacecraft in geocentric and current orbital coordinate systems. These estimates are determined from the geocentric hodographs of the spacecraft's axes which have been calculated as a result of astronomical distant measurement of the stars recognized through the optical electronic devices fixed to the body of the spacecraft. These estimates are used as a priori information on board the spacecraft when it is necessary to make decisions regarding navigation or orientation. The applicability of this method is confirmed by modeling results. This method is protected by a patent. It provides the formation of the necessary a priori information, for the restoration of the autonomous navigation and system orientation at the beginning of a spacecraft emergency or in cases of other contingencies associated with the loss of a priori (reference) information. Thereby, the degree of autonomy, reliability, and sustainability of the on-board control complex and the probability of fulfilling the flight task is increased.

### Citation

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V. I. Kuznetsov, T. V. Danilova, M. A. Arkhipova. An Autonomous Method to Calculate Spacecraft Orbit and Orientation Parameters in Absence of a priori Information // Transactions of IAA RAS. — 2016. — Issue 38. — P. 38–43. @article{kuznetsov2016, abstract = {An autonomous method is proposed to estimate osculation orbit elements and orientation parameters of a spacecraft in geocentric and current orbital coordinate systems. These estimates are determined from the geocentric hodographs of the spacecraft's axes which have been calculated as a result of astronomical distant measurement of the stars recognized through the optical electronic devices fixed to the body of the spacecraft. These estimates are used as a priori information on board the spacecraft when it is necessary to make decisions regarding navigation or orientation. The applicability of this method is confirmed by modeling results. This method is protected by a patent. It provides the formation of the necessary a priori information, for the restoration of the autonomous navigation and system orientation at the beginning of a spacecraft emergency or in cases of other contingencies associated with the loss of a priori (reference) information. Thereby, the degree of autonomy, reliability, and sustainability of the on-board control complex and the probability of fulfilling the flight task is increased.}, author = {V.~I. Kuznetsov and T.~V. Danilova and M.~A. Arkhipova}, issue = {38}, journal = {Transactions of IAA RAS}, keyword = {autonomous navigation and orientation, astronomical distant measurement, axis hodograph, optical electronic device, recognition of stars}, pages = {38--43}, title = {An Autonomous Method to Calculate Spacecraft Orbit and Orientation Parameters in Absence of a priori Information}, url = {http://iaaras.ru/en/library/paper/1633/}, year = {2016} } TY - JOUR TI - An Autonomous Method to Calculate Spacecraft Orbit and Orientation Parameters in Absence of a priori Information AU - Kuznetsov, V. I. AU - Danilova, T. V. AU - Arkhipova, M. A. PY - 2016 T2 - Transactions of IAA RAS IS - 38 SP - 38 AB - An autonomous method is proposed to estimate osculation orbit elements and orientation parameters of a spacecraft in geocentric and current orbital coordinate systems. These estimates are determined from the geocentric hodographs of the spacecraft's axes which have been calculated as a result of astronomical distant measurement of the stars recognized through the optical electronic devices fixed to the body of the spacecraft. These estimates are used as a priori information on board the spacecraft when it is necessary to make decisions regarding navigation or orientation. The applicability of this method is confirmed by modeling results. This method is protected by a patent. It provides the formation of the necessary a priori information, for the restoration of the autonomous navigation and system orientation at the beginning of a spacecraft emergency or in cases of other contingencies associated with the loss of a priori (reference) information. Thereby, the degree of autonomy, reliability, and sustainability of the on-board control complex and the probability of fulfilling the flight task is increased. UR - http://iaaras.ru/en/library/paper/1633/ ER -