Coordinate Systems

Spacecraft-Centered Celestial Coordinates:

a right ascension S declination

Body-Fixed Coordinates for Spinning Spacecraft:

azimuth X elevation or 9 coelevation (measured from the spin axis)

No standard definitions apply for body-fixed coordinates for three-axis stabilized spacecraft. Jl""

Roll, Pitch, Yaw:

Pitch axis, P, toward negative orbit normal Vj^ Roll axis, R, such that R = PxY Unfortunately, the roll, pitch, and yaw axes do not have generally accepted meanings in spaceflight. Usage depends on the context.

roll angle, measured about R pitch angle, measured about P L yaw angle, measured about Y

Positive roll, pitch, and yaw are right-handed rotations about their respective axes.

Was this article helpful?

0 0

Post a comment