public double pairingThreshold() {
        /*
         * We use 7000 because this equals 7 seconds (in milliseconds). Radar hits are normally
         * updated every 13 seconds or less. Thus, we know any two aircraft will have radar hits
         * within 6.5 seconds of each other. 6500 is rounded up to 7000 because...why not.
         */
        final double timeComponent = timeCoef() * 7_000;
        final double distComponent = distCoef() * trackPairingDistanceInNM() * Spherical.feetPerNM();

        final double pairingThreshold = timeComponent + distComponent;

        return pairingThreshold;
    }
@Test
    public void testDerivedPairThresholdReflectsDistCoef() {

        double TOLERANCE = 0.0001;

        PairingConfig noDistProps = new PairingConfig(timeWindow, 10, 1, 0);

        assertEquals(
            noDistProps.pairingThreshold(),
            7000.0,
            TOLERANCE
        );
    }