magnetic declination

简明释义

磁差

英英释义

例句

1.When navigating with a compass, it's important to account for magnetic declination (磁偏角) to ensure accurate readings.

在使用指南针导航时，考虑到磁偏角 (磁偏角) 是确保读数准确的重要因素。

2.The magnetic declination (磁偏角) can vary significantly depending on your location on the Earth.

根据你在地球上的位置，磁偏角 (磁偏角) 可能会有显著变化。

3.Before heading out on a hike, check the local map for the current magnetic declination (磁偏角).

在出发远足之前，查看当地地图以获取当前的磁偏角 (磁偏角)。

4.In aviation, pilots must adjust for magnetic declination (磁偏角) to maintain their flight path.

在航空领域，飞行员必须调整磁偏角 (磁偏角) 以维持飞行路径。

5.Using GPS devices often requires knowledge of magnetic declination (磁偏角) for precise navigation.

使用GPS设备通常需要了解磁偏角 (磁偏角) 以便进行精确导航。

作文

Understanding the concept of magnetic declination is essential for navigation and geography enthusiasts alike. Magnetic declination refers to the angle between magnetic north, as indicated by a magnetic compass, and true north, which is the direction along the Earth's surface towards the geographic North Pole. This difference arises due to the irregularities in the Earth's magnetic field, which can vary significantly depending on where you are located on the planet. For instance, if you were to stand at a location where the magnetic declination is measured to be 10 degrees east, it means that when your compass points to magnetic north, true north is actually 10 degrees to the west of that point. Conversely, if the magnetic declination is 10 degrees west, true north will be 10 degrees to the east of magnetic north. The importance of magnetic declination becomes even more pronounced when considering activities such as hiking, sailing, or flying. Navigators must adjust their compasses according to the local magnetic declination to ensure they reach their intended destinations accurately. Failure to account for this angle can result in significant navigational errors, leading adventurers far off course.In addition, magnetic declination is not static; it changes over time due to the movement of the Earth's magnetic poles and geological processes. This means that maps and navigation tools must be updated regularly to reflect the current magnetic declination for a given area. For example, a map created ten years ago may no longer be accurate if the magnetic declination has shifted since its publication. To measure magnetic declination, various tools and methods can be employed. One common method involves using a compass and a known true north reference, such as a landmark or celestial body. By comparing the compass reading with the true north direction, one can determine the magnetic declination for that specific location. Additionally, modern technology, such as GPS devices, can provide real-time data on magnetic declination, making navigation easier and more accurate than ever before.In conclusion, magnetic declination is a fundamental concept in navigation that highlights the discrepancy between magnetic and true north. Understanding and accounting for magnetic declination is crucial for anyone involved in outdoor activities or navigation. As our understanding of the Earth's magnetic field continues to evolve, so too will our ability to navigate the world with precision and confidence.

理解磁偏角的概念对导航和地理爱好者来说至关重要。磁偏角是指磁北（由磁罗盘指示）与真北（即沿地球表面指向地理北极的方向）之间的角度。这种差异是由于地球磁场的不规则性造成的，具体取决于你在地球上的位置。例如，如果你站在一个测量到的磁偏角为10度东的地方，这意味着当你的罗盘指向磁北时，真北实际上是在该点的西方10度。相反，如果磁偏角为10度西，真北将在磁北的东侧10度。磁偏角的重要性在于，无论是徒步旅行、航海还是飞行等活动中，导航者都必须根据当地的磁偏角来调整他们的罗盘，以确保准确到达目的地。如果不考虑这个角度，可能会导致显著的导航错误，使冒险者远离航线。此外，磁偏角并不是静态的；它会随着时间的推移而变化，原因在于地球磁极的移动和地质过程。这意味着地图和导航工具必须定期更新，以反映特定区域当前的磁偏角。例如，十年前制作的地图，如果自其出版以来磁偏角发生了变化，可能就不再准确。测量磁偏角的方法有多种。一种常见的方法是使用罗盘和已知的真北参考点，例如地标或天体。通过将罗盘读数与真北方向进行比较，可以确定该特定位置的磁偏角。此外，现代技术如GPS设备可以提供关于磁偏角的实时数据，使导航变得比以往更简单和准确。总之，磁偏角是导航中的一个基本概念，突显了磁北和真北之间的差异。理解并考虑磁偏角对任何参与户外活动或导航的人来说都是至关重要的。随着我们对地球磁场理解的不断发展，我们在精确和自信地导航世界的能力也将不断提高。