As background information to support interpretation of results during testing under 2-gyro operation, this report summarizes typical behavior gleaned from several observations with ACS, WF/PC, WFPC2, STIS and NICMOS. The observations used have all been for at least five consecutive orbits, and have collected data with the goal of producing very high signal-to-noise, time-series photometry for w...

Anomalous ion and impurity heating in reversed field pinch plasmas is addressed. Previous work #N. Mattor et al., Comments Plasma Phys. Controlled Fusion 15, 65 !1992"$, which calculated the heating of bulk ions by gyro and Landau resonances with turbulent fluctuations cascading from unstable tearing modes, is extended to impurity species measured in Madison symmetric torus !MST". The heavier m...

This paper integrates the mechanical image stabilization into the polarization information acquisition device. On the basis of analyzing the structure of gyro stabilization platform which is used to gain polarization information and the inertial stabilization isolation theory, the factors that affect the precision of gyro stabilization platform are researched. Furthermore, the modeling and simu...

Spherical tokamaks (STs) provide a challenging regime for the study of turbulent transport in magnetised plasmas, providing an opportunity to test gyrokinetic and MHD fluid turbulence theory under extreme conditions. The strong field curvature at low aspect ratio has an important influence on micro-stability; both aspect ratio and flow-shear affect transport and at high-β, electromagnetic effec...

Rotation vector algorithm regarded as a classical and conventional attitude algorithm is widely used in strapdown inertial navigation system. This kind of algorithm usually uses incremental angle in calculation processes. However, the output of fiber-optic gyro is angular rate. Integrating angular rate to get incremental angle leads calculation errors. In this paper, a set of improved attitude ...

In this paper, the problem of estimating the attitude of a micro-nano satellite, obtaining geomagnetic field measurements via a three-axis magnetometer and obtaining angle rate via gyro, is considered. For this application, a QMRPF-UKF master-slave filtering method is proposed, which uses the QMRPF and UKF algorithms to estimate the rotation quaternion and the gyro bias parameters, respectively...