ephemeris data

简明释义

星历表数据

英英释义

例句

1.Astronomers rely on ephemeris data to accurately predict the positions of celestial bodies over time.

天文学家依赖天体历数据来准确预测天体随时间的位置。

2.Satellite navigation systems use ephemeris data to determine the location of satellites in orbit.

卫星导航系统使用天体历数据来确定卫星在轨道上的位置。

3.In space missions, engineers analyze ephemeris data to plan trajectories for spacecraft.

在太空任务中，工程师分析天体历数据以规划航天器的轨迹。

4.The accuracy of GPS relies heavily on updated ephemeris data from satellite systems.

GPS的准确性在很大程度上依赖于来自卫星系统的更新天体历数据。

5.Astrophysicists utilize ephemeris data to study the movement of stars and galaxies.

天体物理学家利用天体历数据研究恒星和星系的运动。

作文

In the realm of astronomy and space exploration, precise navigation and accurate positioning are paramount. One of the key components that facilitate this is the use of ephemeris data, which refers to the tabulated information that provides the positions of celestial bodies at specific times. This data is crucial for astronomers, satellite operators, and space agencies as it allows them to predict the movements of planets, moons, and artificial satellites with a high degree of accuracy.The term ephemeris comes from the Greek word 'ephemeros', meaning 'daily'. Historically, ephemerides were published in almanacs and provided essential astronomical data for navigators and scientists. With advancements in technology, the collection and dissemination of ephemeris data have become more sophisticated, involving complex algorithms and real-time data processing.One of the primary applications of ephemeris data is in satellite navigation systems, such as the Global Positioning System (GPS). GPS relies on a network of satellites that transmit their precise locations and time signals to receivers on Earth. The ephemeris data from these satellites allows GPS receivers to calculate their exact position by triangulating signals from multiple satellites. Without accurate ephemeris data, the positioning accuracy of GPS would be significantly compromised, leading to errors that could affect everything from personal navigation to military operations.Moreover, ephemeris data plays a vital role in astronomical research. Scientists use it to track the orbits of comets, asteroids, and other celestial phenomena. For instance, when a new comet is discovered, astronomers rely on ephemeris data to predict its trajectory and potential impact with Earth. This predictive capability is essential for planetary defense initiatives, as it enables scientists to assess the risks posed by near-Earth objects.In addition to practical applications, ephemeris data also serves an educational purpose. It helps students and amateur astronomers understand the movements of celestial bodies and the mechanics of the solar system. By studying ephemeris data, one can gain insights into the gravitational influences of different planets and how they interact with one another over time.The generation of ephemeris data involves sophisticated mathematical models and simulations. These models take into account various factors such as gravitational forces, orbital eccentricities, and perturbations caused by other celestial bodies. As a result, the accuracy of ephemeris data has improved dramatically over the years, allowing for better predictions and a deeper understanding of the universe.In conclusion, ephemeris data is an indispensable tool in the fields of astronomy and space exploration. Its applications range from satellite navigation to planetary defense, making it a cornerstone of modern scientific endeavors. As technology continues to advance, the importance of ephemeris data will only grow, enabling humanity to explore and understand the cosmos in ways previously thought impossible.

在天文学和太空探索领域，精确的导航和准确的位置至关重要。促成这一点的关键组成部分之一是使用天体历数据，它指的是提供特定时间内天体位置的表格信息。这些数据对于天文学家、卫星操作员和航天机构至关重要，因为它使他们能够以高度的准确性预测行星、月球和人造卫星的运动。术语天体历源自希腊词'ephemeros'，意为'每日'。历史上，天体历在年鉴中发布，为导航员和科学家提供了重要的天文学数据。随着技术的进步，天体历数据的收集和传播变得更加复杂，涉及复杂的算法和实时数据处理。天体历数据的主要应用之一是在卫星导航系统中，例如全球定位系统（GPS）。GPS依赖于一个卫星网络，该网络向地球上的接收器发送其精确的位置和时间信号。这些卫星的天体历数据使GPS接收器能够通过三角测量多个卫星的信号来计算其确切位置。如果没有准确的天体历数据，GPS的定位精度将大大受到影响，从而导致可能影响从个人导航到军事行动的错误。此外，天体历数据在天文研究中也发挥着至关重要的作用。科学家使用它来跟踪彗星、小行星和其他天体现象的轨道。例如，当发现一颗新彗星时，天文学家依赖于天体历数据来预测其轨迹和与地球的潜在碰撞。这种预测能力对于行星防御计划至关重要，因为它使科学家能够评估近地物体带来的风险。除了实际应用，天体历数据还具有教育意义。它帮助学生和业余天文学家理解天体的运动和太阳系的机制。通过研究天体历数据，人们可以深入了解不同行星的引力影响，以及它们如何随时间相互作用。生成天体历数据涉及复杂的数学模型和模拟。这些模型考虑了各种因素，例如引力、轨道偏心率以及其他天体造成的扰动。因此，天体历数据的准确性在过去几年中显著提高，使得更好的预测和对宇宙更深刻的理解成为可能。总之，天体历数据是天文学和太空探索领域中不可或缺的工具。它的应用范围从卫星导航到行星防御，使其成为现代科学努力的基石。随着技术的不断进步，天体历数据的重要性只会增加，使人类能够以前所未有的方式探索和理解宇宙。