Incorporating delayed star tracker measurements in Gokturk-2 satellite attitude filter

Date

2023-01-01

Author

Kahraman, Ozgur
Söken, Halil Ersin

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Star trackers (STRs) are widely used for fine attitude estimation. Due to the processing time for tasks such as star identification, tracking, and attitude solution, a STR can provide the attitude quaternion measurements with a time delay, which may be as high as a few 100 ms. Different methods are available for incorporating such delayed measurements in the attitude filter, such as the most straightforward method of propagating the measurements to the actual filter time. This study evaluates different methods to incorporate the delayed STR measurements in the Gokturk-2 satellite attitude filter, which is structured as a Multiplicative Extended Kalman Filter (MEKF). Methods are compared in terms of accuracy, computational load, and impact on the filter's optimality. They are evaluated using the simulated data for an Earth observation spacecraft in Sun-synchronous orbit and the actual STR data for the operational Gokturk-2 satellite.

Subject Keywords

Attitude estimation, Attitude filter, Measurement delay, Star tracker measurements

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150437627&origin=inward
https://hdl.handle.net/11511/102681

Journal

Advances in Space Research

DOI

https://doi.org/10.1016/j.asr.2023.03.005

Collections

Department of Aerospace Engineering, Article

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Citation Formats

O. Kahraman and H. E. Söken, “Incorporating delayed star tracker measurements in Gokturk-2 satellite attitude filter,” Advances in Space Research, pp. 0–0, 2023, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85150437627&origin=inward.