the global computer simulation based on the magnetohydrodynamic (mhd) theory describes the evolution of physical conditions in the simulation domain based on measurements for each point in the solar wind. considering the size of magnetosphere and strong spatial variation of the energy transfer process, the amount of transferred energy cannot be directly measured on the surface of magnetosphere,...

| The Compton Gamma-Ray Observatory has completed 4 years of observations comprising a full-sky survey and several deep pointings. The Crab is one of the strongest permanent sources in the CGRO energy range (20 keV to 10 GeV). Its total (pulsed and unpulsed) emission is often used as a calibration standard. We present the results of an analysis of data from all four CGRO instruments obtained du...

The standard reference frame for a camera C is a right-handed Cartesian frame with its origin at the center of projection of C, its positive Z axis pointing towards the scene along the optical axis of the lens, and itsX axis pointing to the right1 along the rows of the camera sensor. As a consequence, the Y axis points downwards along the columns of the sensor. Coordinates in the standard refer...

The observed orientations of a sunward structure (SS) in the dust tail of comet 19P/Borrelly, as it appears in 20 images taken under different projection conditions over a period of 142 days, are compared with the theoretical orientations computed on the basis of two different models: the Spin Model, in which the SS is assumed to be a linear dust jet from an active source close to the cometary ...

Various methods are presented to control the attitude of satellite due to lack of information of yaw axis attitude so far. In this paper, a new method is used which is more general and is applicable to all types of satellites, with at least one controller. This method is not limited to YAW axis and can control the two other axes as well. One feature of this approach is the ability to be modi...

Various methods are presented to control the attitude of satellite due to lack of information of yaw axis attitude so far.&#10In this paper, a new method is used which is more general and is applicable to all types of satellites, with at least one controller. &#10This method is not limited to YAW axis and can control the two other axes as well. One feature of this approach is the ability to be ...

A control system is proposed for a low Earth orbit gravity gradient stabilised microsatellite using Z wheel. The microsatellite is 3-axis stabilized using a yaw reaction wheel, with dual redundant 3-axis magnetorquers. Two vector magnetometers and four dual sun sensors are carried in order to determine the full attitude. The attitude was estimated using an Euler angles (small libration version)...

A control system is proposed for a low Earth orbit gravity gradient stabilised microsatellite using Z wheel. The microsatellite is 3-axis stabilized using a yaw reaction wheel, with dual redundant 3-axis magnetorquers. Two vector magnetometers and four dual sun sensors are carried in order to determine the full attitude. The attitude was estimated using an Euler angles (small libration version)...