ex-meridian altitude

简明释义

近中天高度

英英释义

例句

1.The navigator calculated the ex-meridian altitude to determine the ship's position at sea.

导航员计算了经线高度以确定船只在海上的位置。

2.Understanding ex-meridian altitude is crucial for accurate celestial navigation.

理解经线高度对于精确的天文导航至关重要。

3.The sailor adjusted the sextant reading based on the ex-meridian altitude of the sun.

水手根据太阳的经线高度调整了六分仪读数。

4.Using the ex-meridian altitude, we were able to plot our course more accurately.

通过使用经线高度，我们能够更准确地绘制航线。

5.The ex-meridian altitude is measured when the celestial body is at its highest point in the sky.

当天体在天空中达到最高点时，测量经线高度。

作文

In the field of navigation and astronomy, understanding various terms is crucial for accurate measurement and observation. One such term is ex-meridian altitude, which refers to the altitude of a celestial body measured after it has crossed the local meridian. This concept plays a significant role in celestial navigation, allowing navigators to determine their position on Earth based on the observed positions of stars or the sun. The term 'meridian' itself signifies an imaginary line that runs from the North Pole to the South Pole, dividing the Earth into eastern and western hemispheres. When a celestial body crosses this line, its altitude can be recorded to provide valuable information about the observer's latitude. Understanding ex-meridian altitude is essential for sailors and aviators who rely on celestial navigation techniques. For instance, when a navigator observes the sun at noon, they can calculate their longitude based on the sun's position relative to the local meridian. However, the altitude measured before and after the meridian crossing can differ significantly due to the curvature of the Earth and atmospheric conditions. Therefore, knowing the ex-meridian altitude helps navigators adjust their calculations to account for these variations, ensuring more accurate positioning.Moreover, the concept of ex-meridian altitude also finds applications in various scientific fields, including meteorology and geophysics. In meteorology, understanding the altitude of celestial bodies can aid in weather prediction models, as atmospheric conditions can affect how we perceive these bodies. Similarly, in geophysics, measuring the ex-meridian altitude of celestial bodies can help scientists understand gravitational variations, which can provide insights into the Earth's interior structure.In conclusion, the term ex-meridian altitude encapsulates an important aspect of celestial navigation and scientific observation. By measuring the altitude of celestial bodies after they cross the local meridian, navigators and scientists can obtain critical data that aids in determining geographic positions and understanding atmospheric phenomena. Mastering this concept not only enhances navigational skills but also contributes to broader scientific knowledge, making it essential for anyone involved in navigation or astronomy. As technology continues to advance, the principles behind ex-meridian altitude will remain relevant, reminding us of the intricate relationship between our planet and the celestial bodies that grace our skies.

在导航和天文学领域，理解各种术语对于准确测量和观察至关重要。其中一个术语是ex-meridian altitude，指的是在天体经过当地子午线后测得的天体高度。这个概念在天体导航中发挥着重要作用，使导航员能够根据观察到的星星或太阳的位置确定他们在地球上的位置。术语“子午线”本身表示一条从北极到南极的想象线，将地球分为东半球和西半球。当一个天体穿过这条线时，可以记录其高度，以提供有关观察者纬度的宝贵信息。理解ex-meridian altitude对于依赖天体导航技术的水手和飞行员至关重要。例如，当导航员在中午观察太阳时，他们可以根据太阳相对于当地子午线的位置计算自己的经度。然而，在子午线穿越前后的高度测量可能会因地球的曲率和大气条件而显著不同。因此，了解ex-meridian altitude有助于导航员调整他们的计算，以考虑这些变化，从而确保更准确的定位。此外，ex-meridian altitude的概念还在气象学和地球物理学等多个科学领域中得到了应用。在气象学中，了解天体的高度可以帮助天气预测模型，因为大气条件会影响我们对这些天体的感知。同样，在地球物理学中，测量天体的ex-meridian altitude可以帮助科学家理解重力变化，这可以提供关于地球内部结构的见解。总之，术语ex-meridian altitude概括了天体导航和科学观察的重要方面。通过测量天体在穿越当地子午线后的高度，导航员和科学家可以获得关键数据，帮助确定地理位置并理解大气现象。掌握这一概念不仅增强了导航技能，还促进了更广泛的科学知识，使其成为任何参与导航或天文学的人必不可少的内容。随着科技的不断进步，ex-meridian altitude背后的原理将继续保持相关性，提醒我们地球与点缀我们天空的天体之间错综复杂的关系。