Position and Time Determination without Prior State Knowledge via Onboard Optical Observations of Delta Scuti Variable Stars
<|reference_start|>Position and Time Determination without Prior State Knowledge via Onboard Optical Observations of Delta Scuti Variable Stars: We present a navigation concept for solving the lost in space and time problem using optical observations of $\delta$ Scuti variable stars. Only a small number of techniques exist that allow a spacecraft to recover from being lost in both space and time, which can be caused by a failure of the onboard clock and navigation systems. Optical observations of $\delta$ Scuti stars, which can be collected onboard from star trackers or navigation cameras, may enable faster and/or more accurate position and time solutions compared to existing techniques without requiring additional equipment. Our results indicate that one day of observation by the OSIRIS-APEX MapCam may enable position and time determination accuracy within 0.05 au (3$\sigma$) and 15 s (3$\sigma$).<|reference_end|>
@article{hou2024position,
    title={Position and Time Determination without Prior State Knowledge via
  Onboard Optical Observations of Delta Scuti Variable Stars},
    author={Linyi Hou, Ishaan Bansal, Clark Davis, Siegfried Eggl},
    journal={arXiv preprint arXiv:2406.17609},
    year={2024},
    archivePrefix={arXiv},
    eprint={2406.17609},
    primaryClass={eess.SY astro-ph.IM cs.SY}
}