上一节介绍了利用CesiumJS开发模拟飞机飞行的应用(一，基本功能)，本节介绍如何在上节基础上添加飞行轨迹所使用数据是从旧金山到哥本哈根的真实航班，并使用 FlightRadar24收集的雷达数据。

添加单个3D点对象

     FlightRadar24 使用多种方法（包括雷达）跟踪空中交通。为简单起见，我们将雷达数据直接复制到我们的应用程序中，但您稍后可以扩展此代码来解析原始数据，甚至在样本从服务器传递到您的应用程序时可视化实时空中交通。如果您有兴趣，可以下载为该航班收集的原始数据。

1添加以下代码以可视化场景中的一个红点并将相机飞向该点。

2单击红点可查看附加的说明。此描述可用于附加信息，例如每个点的确切位置或捕获时间

// STEP 3 CODE (first point)
// This is one of the first radar samples collected for our flight.
const dataPoint = { longitude: -122.38985, latitude: 37.61864, height: -27.32 };
// Mark this location with a red point.
const pointEntity = viewer.entities.add({
  description: `First data point at (${dataPoint.longitude}, ${dataPoint.latitude})`,
  position: Cesium.Cartesian3.fromDegrees(dataPoint.longitude, dataPoint.latitude, dataPoint.height),
  point: { pixelSize: 10, color: Cesium.Color.RED }
});
// Fly the camera to this point.
viewer.flyTo(pointEntity);

 要添加系列连续雷达3D点对象， 请将上面的代码（添加单个3D对象）替换 为以下加载批量数据代码。

// STEP 3 CODE (all points)
// These are all the radar points from this flight.
const flightData = JSON.parse(
  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);
// Create a point for each.
for (let i = 0; i < flightData.length; i++) {
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  viewer.entities.add({
    description: `Location: (${dataPoint.longitude}, ${dataPoint.latitude}, ${dataPoint.height})`,
    position: Cesium.Cartesian3.fromDegrees(dataPoint.longitude, dataPoint.latitude, dataPoint.height),
    point: { pixelSize: 10, color: Cesium.Color.RED }
  });
}