longitude by equal altitude

简明释义

等高天体求取的经度

英英释义

例句

1.The principles of longitude by equal altitude are taught in navigation schools worldwide.

世界各地的导航学校教授等高线经度的原理。

2.Using longitude by equal altitude, we can accurately plot our course across the ocean.

利用等高线经度，我们可以准确地绘制穿越海洋的航线。

3.The method of longitude by equal altitude helps sailors find their way when traditional landmarks are not visible.

当传统地标不可见时，等高线经度的方法帮助水手找到方向。

4.Navigators often determine their position at sea using techniques such as longitude by equal altitude.

导航员通常使用诸如等高线经度的技术来确定他们在海上的位置。

5.In astronomy, longitude by equal altitude is a valuable technique for locating celestial bodies.

在天文学中，等高线经度是一种定位天体的宝贵技术。

作文

The concept of navigation has evolved dramatically over the centuries, allowing explorers and travelers to traverse the globe with increasing precision. One of the fundamental methods used in celestial navigation involves determining one’s position using the stars and celestial bodies. Among these techniques, the method referred to as longitude by equal altitude plays a crucial role in helping navigators ascertain their longitudinal position at sea. This essay aims to explore the significance of this method and its application in maritime navigation.To begin with, understanding the term longitude by equal altitude is essential. This technique involves measuring the altitude of celestial bodies, such as the sun or stars, at different times during the day. By taking these measurements from two distinct locations along the same latitude, navigators can determine their longitude. The principle behind this method is based on the fact that the angle of elevation of a celestial body changes as one moves east or west across the Earth’s surface. Therefore, by comparing the altitudes observed at different times, navigators can calculate their longitudinal position accurately.Historically, the ability to measure longitude was a significant challenge for sailors. While latitude could be determined relatively easily by observing the North Star or the sun at noon, longitude remained elusive until the development of reliable timekeeping devices. The introduction of accurate marine chronometers allowed sailors to compare their local time with Greenwich Mean Time, which was essential for calculating longitude. However, the longitude by equal altitude method provided an alternative approach that did not solely rely on precise timekeeping.The practical application of longitude by equal altitude involves several steps. First, navigators must select a celestial body to observe. The sun is often chosen due to its brightness and visibility. Next, they take altitude readings at two different times, ensuring that they are at the same latitude. These readings are then plotted on a celestial navigation chart, allowing navigators to draw lines of equal altitude. The intersection of these lines provides the navigator with their longitudinal position.This method not only enhances navigational accuracy but also fosters a deeper understanding of celestial movements. Navigators become attuned to the rhythms of the sky, learning to read the stars and the sun as guides through the vast oceans. Additionally, the longitude by equal altitude technique emphasizes the importance of patience and observation in navigation, qualities that are invaluable to any sailor.In modern times, while GPS technology has revolutionized navigation, the principles of celestial navigation, including longitude by equal altitude, remain relevant. Understanding these traditional methods can provide backup options when electronic systems fail. Moreover, they serve as a reminder of humanity’s enduring connection to the natural world and our reliance on it for guidance.In conclusion, the method of longitude by equal altitude is a testament to the ingenuity of navigators throughout history. It showcases the blend of science, art, and observation that defines the practice of navigation. As we continue to explore the seas and skies, the lessons learned from this technique remind us of the importance of understanding our environment and the celestial bodies that influence our journeys. Whether one is a seasoned sailor or a curious traveler, the knowledge of longitude by equal altitude enriches our experience of navigating the world around us.

导航的概念在几个世纪中发生了巨大的变化，使探索者和旅行者能够以越来越高的精确度穿越全球。天文导航中使用的一种基本方法涉及利用星星和天体来确定自己位置。在这些技术中，被称为等高度经度的方法在帮助导航员确定海上经度位置方面发挥着重要作用。本文旨在探讨这种方法的重要性及其在海洋导航中的应用。首先，理解等高度经度这一术语是至关重要的。这种技术涉及在一天中的不同时间测量天体（如太阳或星星）的高度。通过从两个不同地点（位于相同纬度）进行这些测量，导航员可以确定他们的经度。这种方法的原理基于这样一个事实：随着人们在地球表面向东或向西移动，天体的高度角会发生变化。因此，通过比较在不同时间观察到的高度，导航员可以准确计算出他们的经度位置。历史上，测量经度的能力对水手来说是一个重大挑战。虽然可以通过观察北极星或正午的太阳相对容易地确定纬度，但经度一直是个难题，直到可靠的计时设备的发展。精确的海洋计时器的引入使水手能够将当地时间与格林威治标准时间进行比较，这对计算经度至关重要。然而，等高度经度方法提供了一种不完全依赖精确计时的替代方法。等高度经度的实际应用涉及几个步骤。首先，导航员必须选择一个天体进行观察。由于太阳的亮度和可见性，通常选择太阳。接下来，他们在两个不同的时间进行高度读数，确保他们处于相同的纬度。这些读数随后被绘制在天文导航图上，允许导航员绘制等高度线。这些线的交点为导航员提供了他们的经度位置。这种方法不仅提高了导航的准确性，而且培养了对天体运动的更深刻理解。导航员变得敏锐，学习如何阅读星星和太阳，作为他们穿越广阔海洋的指南。此外，等高度经度技术强调了耐心和观察在导航中的重要性，这些品质对任何水手都是无价的。在现代，尽管GPS技术彻底改变了导航，但包括等高度经度在内的天文导航原理仍然是相关的。理解这些传统方法可以在电子系统故障时提供备选方案。此外，它们提醒我们人类与自然世界之间持久的联系以及我们对其指导的依赖。总之，等高度经度的方法是对历史上导航员智慧的证明。它展示了科学、艺术和观察的结合，定义了导航实践。当我们继续探索海洋和天空时，从这一技术中学到的教训提醒我们理解环境和影响我们旅程的天体的重要性。无论是经验丰富的水手还是好奇的旅行者，了解等高度经度都丰富了我们对周围世界的导航体验。