Autonomous on-orbit calibration is critical for the development of star sensors. However,
simultaneous estimation of optical parameters and star sensor distortion are a challenging …

To enhance the dynamic performance and stability of spacecraft attitude measurement, a
commonly adopted approach is to integrate a star sensor with an inertial gyroscope. While …

The star sensor is a prerequisite navigation device for a spacecraft. The on-orbit calibration
is an essential guarantee for its operation performance. However, traditional calibration …

The objective of this research is to study different novel developed techniques for spacecraft
attitude determination methods using star tracker sensors. This dissertation addresses …

The integration of a star tracker and gyroscope units (GUs) can take full advantage of the
benefits of each, and provide continuous and accurate attitude information with a high …

Star identification is the most critical and important process for attitude estimation, given data
from any star sensor. The main purpose of the Star Identification (Star-ID) process is to …

We have developed a calibration approach for a star tracker camera. A modified version of
the least-squares iteration algorithm combining Kalman filter is put forward, which allows for …

German Aerospace Center (DLR) is designing and develo** a novel star tracker to be
used as the primary attitude sensor for the SHEFEX mission. The developed star tracker is …

Digital sun sensor is one of the most important sensors used in the Attitude Determination
System (ADS) of the satellite. Due to the harsh environmental conditions that exist in the …

Star trackers must be calibrated prior to flight so that they can make accurate measurements
of star positions within the instrument field of view. This calibration is usually performed in …