public Distance altitudeDelta() {
        double delta = abs(point1.altitude().inFeet() - point2.altitude().inFeet());
        return Distance.of(delta, Distance.Unit.FEET);
    }
@Test
    public void testAltitudeDelta() {
        //alt = 2400
        Point p1 = NopHit.from("[RH],STARS,A80_B,02/12/2018,18:36:46.667,JIA5545,CRJ9,E,5116,024,157,270,033.63143,-084.33913,1334,5116,22.4031,27.6688,1,O,A,A80,OZZ,OZZ,ATL,1827,ATL,ACT,IFR,,01719,,,,,27L,L,1,,0,{RH}");
        //alt = 3400
        Point p2 = NopHit.from("[RH],STARS,A80_B,02/12/2018,18:36:46.667,JIA5545,CRJ9,E,5116,034,157,270,033.63143,-084.33913,1334,5116,22.4031,27.6688,1,O,A,A80,OZZ,OZZ,ATL,1827,ATL,ACT,IFR,,01719,,,,,27L,L,1,,0,{RH}");

        PointPair pair = new PointPair(p1, p2);

        assertTrue(pair.altitudeDelta().equals(Distance.ofFeet(1_000)));
    }