With User defined selected as Orbit type in the Orbital Parameters feature, the normal axis is defined as the normalized cross product of the zenith axis and the spacecraft velocity axis in the equatorial coordinate system.
|
•
|
Nadir (default) to make the primary spacecraft direction pointing toward the center of the planet, the opposite of Zenith.
|
|
•
|
Zenith to make the primary spacecraft direction pointing away from the center of the planet.
|
|
•
|
Sun or Anti-Sun to make the primary spacecraft direction pointing toward the Sun or to the opposite direction.
|
|
•
|
Velocity or Antivelocity to make the primary spacecraft direction pointing toward the direction of motion of the spacecraft or to the opposite direction.
|
|
•
|
Normal or Antinormal to make the primary spacecraft direction pointing toward the normal of the orbital plane or to the opposite direction.
|
|
|
With User defined selected as Orbit type in the Orbital Parameters feature, the normal axis is defined as the normalized cross product of the zenith axis and the spacecraft velocity axis in the equatorial coordinate system.
|
|
•
|
Celestial to make the primary spacecraft direction pointing toward a point by giving its celestial coordinates. Set the Declination and Right ascension to locate the point with its celestial coordinates.
|
|
•
|
User defined to define explicitly the pointing direction.
|
 |
See Theory for Orbital Thermal Loads for the definition of the spacecraft position over time and the coordinate system transformation.
|