ssapy_toolkit.Coordinates.lonlat_perigee

ssapy_toolkit.Coordinates.lonlat_perigee(lon, lat, t, alt=1000000.0, e=0, i=None, EARTH_MU=398600441800000.0)

Create an Orbit whose perigee is exactly over the fixed geodetic longitude/latitude (lon, lat) at epoch t.

Parameters:

• lon (float) – Geodetic longitude in degrees.

• lat (float) – Geodetic latitude in degrees.

• t (str or Time) – Epoch (ISO string or Astropy Time).

• alt (float) – Altitude above Earth surface in meters.

• e (float) – Eccentricity of the orbit.

• i (float) – Inclination in degrees. Defaults to the same as latitude if None.

• EARTH_MU (float) – Earth’s gravitational parameter [m³/s²].

Returns:

Orbit object with perigee over (lon, lat) at time t.

Return type:

Orbit