The trailing aerial which allowed them to request bearings on 500 kHz from ground stations was removed.

飞机的垂下天线被拆除，这条天线原用于在离地面 500 kHz 的高空请求方位。

But without those ground stations, the entire system wouldn't work.

但如果没有这些地面站，整个系统将无法工作。

The network sends a signal to the spacecraft, which then sends a signal back to DSN ground stations in Australia, Spain and the United States.

该网络向航天器发送信号，航天器再将信号传回澳大利亚、西班牙和美国的深空网络地面站。

That satellite then needs to relay those signals down to a ground station that's connected to existing fiber optic infrastructure.

然后，该卫星需要将这些信号转发到连接到现有光纤基础设施的地面站。

South Africa itself plays an important role in space exploration with plans for ground station in the Karoo region that will support NASA's future deep space missions.

南非本身在太空探索中发挥着重要作用，计划在卡鲁地区建立地面站，支持美国国家航空航天局未来的深空任务。

Second element, basically ground stations that are alongside the tracks to tell them about switch positions where there might be work crews, other things to be concerned about.

第二个因素就是，轨道旁的地面卫星接收站能够告诉列车连接位置，那里或许还有其他工作人员，或是其它连接点。

That ground station then relays those signals back to the satellite, which then relays them back to you and your user terminal.

该地面站然后将这些信号中继回卫星，然后卫星再将它们中继回您和您的用户终端。

It is going to show you the ground station so you can see what the path is that the two satellites are actually following.

它将向您展示地面站，以便您可以看到两颗卫星实际遵循的路径。

And you need to be within several 100 miles of those ground stations in order for you to get the communications that you need.

你需要在这些地面站的几百英里范围内才能获得所需的通信。

I am particularly interested in TV broadcasting from satellites directly into the home, bypassing today's ground stations, a proposal I first described 22 years ago.

我对从卫星直接进入家庭的电视广播特别感兴趣，绕过今天的地面站， 这是我 22 年前首次提出的建议。

Direct broadcast TV will be possible within 5 years and may be most important to undeveloped countries that have no ground stations, and now may never require any.

直播电视将在 5 年内成为可能，对于没有地面站的不发达国家来说可能是最重要的，现在可能永远不需要地面站。

The modern weather models work with a grid of points of the order of sixty miles apart, and even so, some starting data has to be guessed, since ground stations and satellites cannot see everywhere.

现代气象模型以一个坐标图来显示，图中每个点大约是间隔60英里。既使是这样，有些开始时的资料也不得不依靠推测，因为地面工作站和卫星不可能看到地球上的每一个地方。

The ECMWF's computing muscle also lets it start its projections with a replay of the past 12 hours of weather, using 40m data points derived from observations collected by ground stations, aeroplanes, balloons and satellites.

借助其厉害的运算能力，欧洲中期天气预报中心能对过去12小时的气象云图做回放，从而使其天气预报更为准确。云图回放时计算机要处理4000万个数据点，这些数据都是从地面观测站点，气象飞机，气球及气象卫星收集获得的。

Even adding something as apparently straightforward as surface temperature measurements relies on integrating information in a range of formats originating from sensors on satellites, ground stations and floats bobbing atop the deep ocean.

即使添加像表面温度测量这样看似简单的内容，也需要依赖于整合来自卫星、地面站和深海浮标上的传感器的各种格式的信息。