ostk.astrodynamics.data.provider.compute_off_nadir_angles

compute_off_nadir_angles(

state: ostk.astrodynamics.trajectory.State,

target_position: ostk.physics.coordinate.Position,

) → tuple[ostk.physics.unit.Angle, ostk.physics.unit.Angle, ostk.physics.unit.Angle]

Compute the along-track, cross-track and total off-nadir angle between the satellite and the target.

• The along-track angle is the angle between the nadir vector [Z] and the projection of the satellite->target vector onto the plane defined by the satellite local horizontal (velocity vector in circular orbits) [X] and the nadir vector [Z].

• The cross-track angle is the angle between the nadir vector [Z] and the projection of the satellite->target vector onto the plane defined by the negative orbital momentum vector [Y] and the nadir vector [Z].

• The total off-nadir angle is the angle between the nadir vector [Z] and the satellite->target vector.

Parameters:

• state (State) -- The state of the satellite.

• target_position (Position) -- The position of the target.

Returns:

The along-track, cross-track and total off-nadir angle between the satellite and the target.

Return type:

tuple[Angle, Angle, Angle]