Highly elliptical orbit
"Highly elliptical orbit is a high Earth repeating path that is above geosynchronous orbit.
The orbit is more of a long oval shape as compared to a circle.
The perigee (the point in the orbit that is closest to Earth) can be hundreds of miles above the Earth’s surface and the apogee (the point in the orbit that is farthest from Earth) can be tens of thousands of miles above the Earth's surface." (National Aeronautics and Space Administration, 2018)