Mon premier blog

Spacecraft Attitude Determination and Control J.R. Wertz
Publisher: Springer

- Active 3-axis control via magnetorquers. A spacecraft system comprises various subsystems, dependent upon mission profile. ANTELSAT Brochure http://iie.fing.edu.uy/investigacion/grupos/lai/files/ ANTELSAT_brochure_2012W01.pdf. Using the Earth's magnetic field as a reaction field in attitude determination and control of earth orbiting satellites was first proposed early on in space science applications history. "PhoneSat demonstrates a philosophy of taking a creative idea, then building and testing that inspiration in a very rapid way?as opposed to long planning processes typical of larger spacecraft programs," said Andrew Petro, NASA program executive for Small "The PhoneSat project is kind of a technology demonstration effort," said Jasper Wolfe, technical lead for attitude determination and control of the launch vehicle for the PhoneSat Project at NASA Ames. The guidance algorithm must be carefully scripted so that . Instead of using rocket fuel, which is expensive, heavy, and often toxic, this technique allows spacecraft to change their orbits by pushing against Earth's magnetic field. ANTELSAT is a 2U CubeSat class satellite with a 70 cm SSTV downlink and amateur radio AX.25 Digipeater that is planning a Yasny Dnepr launch in 2013. Such a spacecraft would have to carry little, if any propellant, . 3- Axis Stabilization, Spin Stabilization, Magnetic Stabilization and Gravity gradient stabilization techniques are used in spacecraft attitude control. Attitude control: - Attitude determination via magnetometer and photodetectors. This approach can be used to determine the vehicle attitude as well as the location in space if multiple receivers are located precisely on the spacecraft and their relative positions are differentiated (15). Both translational and rotational commands to the spacecraft attitude control rockets are required and would be generated by the guidance function of the GN&C system. A well explained attitude determination and control system is provided.