In orbital planning, which parameter primarily defines the orientation of the orbital plane, affecting ground track geometry?

In orbital planning, which parameter primarily defines the orientation of the orbital plane, affecting ground track geometry?

• A. RAAN
• B. Orbital speed
• C. Inclination
• D. Eccentricity

Answer: (A)

The orientation of the orbital plane in space is fixed by where the plane intersects the equator, which is described by the longitude of the ascending node. This angle, known as the Right Ascension of the Ascending Node, tells you how the plane is rotated around Earth’s spin axis relative to a reference direction, and that rotation directly shapes the ground track’s path on the surface. The inclination sets how far north and south the orbit swings, while orbital speed and eccentricity influence timing and the orbit’s shape rather than its plane orientation.

The orientation of the orbital plane in space is fixed by where the plane intersects the equator, which is described by the longitude of the ascending node. This angle, known as the Right Ascension of the Ascending Node, tells you how the plane is rotated around Earth’s spin axis relative to a reference direction, and that rotation directly shapes the ground track’s path on the surface. The inclination sets how far north and south the orbit swings, while orbital speed and eccentricity influence timing and the orbit’s shape rather than its plane orientation.