exmeridian altitude

简明释义

近子午高

英英释义

例句

1.Using the exmeridian altitude, the astronomer could predict the timing of celestial events.

利用经度高度，天文学家能够预测天文事件的时间。

2.The pilot referred to the exmeridian altitude to adjust the flight path during the journey.

飞行员参考了经度高度来调整航程中的飞行路径。

3.In celestial navigation, the exmeridian altitude is crucial for accurate positioning.

在天体导航中，经度高度对准确定位至关重要。

4.The navigator calculated the exmeridian altitude to determine the ship's position at noon.

导航员计算了经度高度以确定船只在中午的位置。

5.Calculating the exmeridian altitude requires knowledge of both time and angle.

计算经度高度需要掌握时间和角度的知识。

作文

In the realm of celestial navigation, understanding various terms is crucial for accurate positioning and navigation. One such term that often arises is exmeridian altitude, which refers to the altitude of a celestial body at a specific time after it has crossed the local meridian. This concept plays a vital role in determining one's geographical position on Earth, especially when using sextants or other navigational instruments. The exmeridian altitude is essential for mariners and aviators alike, as it allows them to calculate their latitude and longitude with precision. To grasp the significance of exmeridian altitude, it's important to consider how celestial navigation works. Navigators rely on the positions of stars, planets, and the sun to ascertain their location. As a celestial body crosses the local meridian, it reaches its highest point in the sky, known as the meridian altitude. However, as time progresses after this point, the altitude begins to decrease. This decline is what we refer to as exmeridian altitude. By measuring this altitude at specific intervals, navigators can derive valuable information about their position relative to the celestial body observed.The calculation of exmeridian altitude involves not only the observed angle but also the time elapsed since the celestial body was last at its meridian. For example, if a navigator observes the sun at a certain angle after it has crossed the meridian, they can use that information in conjunction with tables and calculations to determine their latitude. This method is particularly useful in open seas where landmarks are scarce, making celestial bodies the most reliable reference points.Moreover, the understanding of exmeridian altitude is not limited to practical navigation; it also has historical significance. Ancient mariners depended heavily on the positions of stars and the sun to guide their journeys across vast oceans. The principles governing exmeridian altitude were foundational to the development of early navigation techniques, allowing explorers to venture into unknown waters with greater confidence.In modern times, while technology such as GPS has revolutionized navigation, the principles behind exmeridian altitude remain relevant. Many navigators still learn these traditional methods to enhance their skills and ensure they can navigate without reliance on electronic devices. Understanding exmeridian altitude fosters a deeper appreciation for the art and science of navigation, bridging the gap between ancient practices and contemporary techniques.In conclusion, the term exmeridian altitude encapsulates a fundamental concept in celestial navigation that is essential for determining one’s position on Earth. Whether for practical navigation or historical understanding, mastering the implications of exmeridian altitude enriches our knowledge of how humans have traversed the globe by harnessing the power of the stars. As we continue to advance technologically, the timeless wisdom of celestial navigation, including the concept of exmeridian altitude, remains an invaluable asset for those who seek to explore the world around them.

在天文导航领域，理解各种术语对于准确定位和导航至关重要。其中一个常见的术语是exmeridian altitude，它指的是某一特定时间内天体越过当地子午线后所达到的高度。这个概念在确定地球上的地理位置方面发挥着重要作用，特别是在使用六分仪或其他导航仪器时。exmeridian altitude对海员和飞行员同样重要，因为它使他们能够精确计算自己的纬度和经度。要理解exmeridian altitude的重要性，首先要考虑天文导航的工作原理。导航员依靠星星、行星和太阳的位置来确定他们的位置。当一个天体越过当地子午线时，它在天空中达到了最高点，称为子午线高度。然而，随着时间的推移，这一高度开始下降。这一下降就是我们所说的exmeridian altitude。通过在特定间隔内测量这一高度，导航员可以推导出关于他们相对于观察到的天体的位置的有价值信息。计算exmeridian altitude不仅涉及观察到的角度，还涉及自天体最后一次到达子午线以来经过的时间。例如，如果导航员在太阳越过子午线后以某个角度观察到太阳，他们可以结合这些信息与表格和计算来确定他们的纬度。这种方法在开阔海域中特别有用，因为地标稀少，使得天体成为最可靠的参考点。此外，对exmeridian altitude的理解不仅限于实际导航；它也具有历史意义。古代海员在穿越辽阔海洋的旅程中非常依赖星星和太阳的位置。支配exmeridian altitude的原则是早期导航技术发展的基础，使探险者能够更有信心地进入未知水域。在现代，尽管GPS等技术已经彻底改变了导航，但exmeridian altitude背后的原理仍然相关。许多导航员仍然学习这些传统方法，以增强他们的技能，并确保他们可以在没有电子设备的情况下进行导航。理解exmeridian altitude加深了人们对导航艺术和科学的欣赏，弥合了古老实践与当代技术之间的差距。总之，术语exmeridian altitude概括了天文导航中的一个基本概念，对于确定一个人在地球上的位置至关重要。无论是出于实际导航还是历史理解，掌握exmeridian altitude的含义都丰富了我们对人类如何利用星星跨越全球的知识。随着我们技术的不断进步，天文导航的永恒智慧，包括exmeridian altitude的概念，仍然是那些希望探索周围世界的人们的宝贵财富。