The classical sigma-point Kalman filter (SPKF) is widely used in a spacecraft state
estimation area with the Gaussian white noise hypothesis. The actual sensor noise is often …

This study aims to estimate both angular state and rate gyro biases for a small satellite
having multiple attitude sensors. Singular value decomposition (SVD) aided Extended …

Small satellites use commercial off-the-shelf sensors and actuators for attitude determination
and control (ADC) to reduce the cost. These sensors and actuators are usually not as robust …

This paper is concerned with magnetic attitude control of spacecraft. The operation of the
magnetic actuators is usually on a duty cycle; during the off times in this duty cycle the …

Magnetometer plays an important role in strap-down navigation system, but the
measurement results are influenced by various kinds of errors. All combined time-invariance …

A different approach for attitude filtering integrates the filter with one of the static attitude
estimators (eg QUEST) such that the filter uses the estimated attitude by this estimator as the …

The particle filter (PF) is one of the most potential methods for nonlinear state estimation of
spacecraft on account of its accuracy and stability. However, the heavy computational …

This article demonstrates the performance of an improved particle swarm optimization (PSO)
algorithm with scalar checking and rotation axis fitting objectives using in-orbit data, which is …

The advance of space technology allowed small satellites to accomplish missions that were
once only possible with big and expensive platforms. The quality and accuracy of small …

Sun sensors are commonly used attitude sensors because of their low cost, mass, volume,
and power consumption. Analog Sun sensors (ANSS), which are smaller but usually less …