4. 飞机的AGL altitude和MSL altitude 美国联邦航空局(FAA)提到的AGL (above ground level) altitude,是指飞机到地面的垂直距离,一般是等同于无线电高度获得的真实高度(absolute altitude)。当飞机在机场上方时,也可以看作是等同于气压高度表获得的场压高度(QFE),即飞机到机场跑道的相对高度,也可以看作是气压高度表...
AGL changes depending on the terrain below you. Fly over a mountain, and your AGL shrinks. Fly over a canyon, and it grows. MSL, on the other hand, stays consistent for your altitude, regardless of what’s happening below. Quick Tip for Sectional Charts To top On a Sectional Chart, al...
GPS, for example, usesWGS84as the global coordinate system, and with it is the WGS84 ellipsoid. HAE, or Height Above Ellipsoid, or "elevation above surface of ellipsoid", is commonly the form of altitude a GPS receiver returns. It differs fromAGL(height above ground level) and MSL (heigh...