diff --git a/src/pages/cesium/cesium-helper/demo_02_Track.ts b/src/pages/cesium/cesium-helper/demo_02_Track.ts
index 35d0e8e..ab2d17a 100644
--- a/src/pages/cesium/cesium-helper/demo_02_Track.ts
+++ b/src/pages/cesium/cesium-helper/demo_02_Track.ts
@@ -1,5 +1,5 @@
-import { TrackingReferenceFrame, type Viewer } from 'cesium';
 import * as Cesium from 'cesium';
+import { type Viewer } from 'cesium';
 import { eciToEcf, gstime, propagate, twoline2satrec } from 'satellite.js';
 
 /**
@@ -123,10 +123,10 @@ export async function demo_02_Track(viewer: Viewer) {
   // Starlink 卫星通常覆盖范围以锥形方式向地面投射
   // 创建一个椭球体来表示卫星的覆盖范围
   const coverageAngle = 45; // 覆盖角度（度）
-  const coverageRadius = satelliteAltitude * Math.tan(Cesium.Math.toRadians(coverageAngle));
+  const _coverageRadius = satelliteAltitude * Math.tan(Cesium.Math.toRadians(coverageAngle));
 
   // 创建覆盖范围实体
-  const coverageEntity = viewer.entities.add({
+  const _coverageEntity = viewer.entities.add({
     ellipsoid: {
       material: Cesium.Color.BLUE.withAlpha(0.2),
       outline: true,
@@ -156,7 +156,7 @@ export async function demo_02_Track(viewer: Viewer) {
       if (!position) return Cesium.Transforms.eastNorthUpToFixedFrame(new Cesium.Cartesian3());
 
       // 计算从卫星到地球中心的方向
-      const direction = Cesium.Cartesian3.normalize(
+      const _direction = Cesium.Cartesian3.normalize(
         Cesium.Cartesian3.negate(position, new Cesium.Cartesian3()),
         new Cesium.Cartesian3(),
       );