@spec ecef_to_geodetic({float(), float(), float()}) ::
  {:ok, %{latitude: float(), longitude: float(), altitude_km: float()}}

Convert ECEF Cartesian coordinates to geodetic (lat/lon/alt).

Uses iterative algorithm to account for Earth's ellipsoid shape. Based on Vallado's algorithm.

@spec teme_to_ecef({float(), float(), float()}, DateTime.t()) ::
  {float(), float(), float()}

Convert TEME coordinates to ECEF (Earth-Centered Earth-Fixed).

Uses simplified conversion without polar motion corrections.

@spec teme_to_geodetic({float(), float(), float()}, DateTime.t()) ::
  {:ok, %{latitude: float(), longitude: float(), altitude_km: float()}}

Convert TEME position to geodetic coordinates (latitude, longitude, altitude).

This is the main convenience function that chains TEME → ECEF → Geodetic conversions.

Parameters

• teme_position - Position in TEME frame {x, y, z} in km
• datetime - UTC datetime for the position

Returns

{:ok, %{latitude: lat, longitude: lon, altitude_km: alt}} where:

• latitude - Geodetic latitude in degrees (-90 to 90)
• longitude - Geodetic longitude in degrees (-180 to 180)
• altitude_km - Height above WGS84 ellipsoid in kilometers