OPM Cartesian state vector.
position_km and velocity_km_s are {x, y, z} tuples in the metadata
reference frame.
Summary
Types
@type t() :: %Sidereon.CCSDS.OPM.State{ epoch: String.t(), position_km: Sidereon.CCSDS.OPM.vec3(), velocity_km_s: Sidereon.CCSDS.OPM.vec3() }