Satellite Laser Ranging (SLR) systems successfully measure attitude and spin period of Envisat. During the International Laser Ranging Service (ILRS) campaign the SLR stations observed the satellite and provided measurements that allow determination of the attitude and the spin period of Envisat during year 2013. The spin parameters of the spacecraft are stable within a coordinate system fixed ...

This paper describes the development of an Extended Kalman Filter attitude estimator and its implementation in a small satellite control loop. Sensor models have first been added to an existing satellite simulation. The attitude and angular velocities are estimated from the available sensors and methods of tuning the filter based on Genetic Algorithms are discussed. Simulation results are prese...

Proper modeling of the Global Positioning System (GPS) satellite yaw attitude is important in high-precision applications. A new model for the GPS satellite yaw attitude is introduced that constitutes a significant improvement over the previously available model in terms of efficiency, flexibility, and portability. The model is described in detail, and implementation issues, including the prope...

The orientation of a satellite in space described relative to some other object or system is known as the attitude of the satellite. The attitude may be changing with time. To be able to control the attitude of the satellite, it must be equipped with actuators that can produce the required torque. Control Moment Gyroscope is a space craft control actuator which acts as torque amplifier. It is s...

Abstract— The attitude determination and control subsystem (ADCS) requirement of payload on the Algerian Satellite (Alsat-1) is stringent enough to demand some type of data processing in order to meet attitude determination requirements. Two vector magnetometers and four dual sun sensors are carried in order to determine the attitude. This paper describes the various steps of the design and the...

A modified method for satellite attitude control system in presence of novel actuators is proposed in this paper. The attitude control system is composed of three fluidic momentum controller (FMC) actuators that are used to control Euler angles and their dynamics is considered in satellite attitude equations as well. L1 adaptive control is utilized for satellite three-axial ...

A quaternion-based attitude synchronization tracking problem is treated for satellite formation flying without using absolute and relative angular velocity measurements. More specifically, an adaptive control based output feedback attitude synchronization tracking control law is first developed under the requirement of communication links between each satellite in formation and the desired traj...

The Space Tethered Autonomous Robotic Satellite (STARS) is being developed in Kagawa University and it will be launched by the H-IIA rocket by Japan Aerospace Exploration Agency (JAXA) in summer 2007. The main purpose of the STARS is technical verification for a tethered space robot proposed in 1995. The STARS consists of mother and daughter satellites connected by tether. The mother satellite ...

A control law for an Integrated Power/Attitude Control System (IPACS) for a satellite is presented in this paper. Four or more energy/momentum wheels in an arbitrary non-coplanar configuration and a set of three thrusters are used to implement the torque inputs. The energy/momentum wheels are used as attitude control actuators, as well as an energy storage mechanism, providing power to the spac...