Don't hardcoded WGS84 in ground atmosphere
Don't hardcoded WGS84 in ground atmosphere

likangning93/cesium,YonatanKra/cesium,CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium,YonatanKra/cesium,likangning93/cesium,CesiumGS/cesium,progsung/cesium,likangning93/cesium,YonatanKra/cesium,progsung/cesium,YonatanKra/cesium,CesiumGS/cesium,likangning93/cesium,AnalyticalGraphicsInc/cesium,AnalyticalGraphicsInc/cesium,likangning93/cesium