@type frame() :: :ecef | :enu | :caller_defined_cartesian

@type t() :: %Sidereon.Estimation.TrackState{
  covariance: [[float()]],
  dimension: pos_integer(),
  frame: frame(),
  position_covariance_m2: [[float()]],
  position_m: [float()],
  state_dimension: pos_integer(),
  state_vector: [float()],
  t_s: float(),
  velocity_m_s: [float()]
}