parallax of sextant

简明释义

六分仪视差

英英释义

例句

1.He calibrated the parallax of sextant before taking measurements at dawn.

他在黎明前校准了六分仪的视差，然后进行测量。

2.The captain explained how the parallax of sextant affects the altitude readings.

船长解释了六分仪的视差如何影响高度读数。

3.To improve accuracy, sailors must account for the parallax of sextant when measuring star positions.

为了提高准确性，水手在测量星体位置时必须考虑六分仪的视差。

4.Understanding the parallax of sextant is crucial for precise celestial navigation.

理解六分仪的视差对于精确的天文导航至关重要。

5.The navigator adjusted the parallax of sextant to ensure accurate readings during the night watch.

导航员调整了六分仪的视差，以确保在夜间值班时的读数准确。

作文

The sextant is a crucial instrument used in navigation, particularly for celestial navigation. It allows sailors and navigators to measure the angle between an astronomical object and the horizon. This measurement is essential for determining one's position at sea. However, one important aspect that must be considered when using a sextant is the parallax of sextant. The term 'parallax' refers to the apparent shift in position of an object when viewed from different angles. In the context of a sextant, this means that the reading taken may not be entirely accurate due to the observer's eye position relative to the instrument. When using a sextant, the navigator aligns the instrument with a celestial body, such as the sun or a star, and takes a reading of its angle above the horizon. However, if the observer's eye is not perfectly aligned with the index mirror of the sextant, the reading can be affected by parallax. This can lead to errors in navigation, which can be critical when at sea. Therefore, understanding the parallax of sextant is vital for ensuring accurate measurements.To mitigate the effects of parallax, navigators are trained to position their eye directly behind the index mirror. Many modern sextants also come equipped with telescopes that help minimize parallax errors by providing a clearer view of the celestial body being observed. Some sextants even have built-in adjustments to account for parallax, allowing for more precise readings.In addition to its technical implications, the parallax of sextant serves as a reminder of the importance of precision in navigation. Navigators must be meticulous in their approach, ensuring that every measurement is as accurate as possible. A small error in angle measurement can translate to significant differences in position over long distances, potentially leading to navigational hazards.Furthermore, the concept of parallax extends beyond just the use of sextants. It is a fundamental principle in various fields, including astronomy and photography. In astronomy, parallax is used to determine the distance of stars and other celestial objects from Earth. Similarly, in photography, parallax can affect the composition of images, especially in stereoscopic photography where two lenses are used.Understanding the parallax of sextant not only enhances a navigator's skills but also deepens their appreciation for the science of navigation. It highlights the intricate balance between technology and human skill, showcasing how even the smallest details can have significant impacts on outcomes. As navigators continue to rely on both traditional methods and modern technology, the lessons learned from the parallax of sextant will remain relevant.In conclusion, the parallax of sextant is a critical factor that navigators must consider when taking measurements. By understanding and addressing parallax, navigators can improve their accuracy and ensure safe passage across the seas. This knowledge not only enhances their practical skills but also enriches their understanding of the broader principles of navigation and observation.

六分仪是航海中一种重要的仪器，特别是在天文导航中。它允许水手和导航员测量天体与地平线之间的角度。这一测量对于确定在海上的位置至关重要。然而，在使用六分仪时，一个必须考虑的重要方面是六分仪的视差。术语“视差”指的是当从不同角度观察物体时，其位置的表观变化。在六分仪的上下文中，这意味着由于观察者的眼睛位置相对于仪器的不同，所测得的读数可能并不完全准确。在使用六分仪时，导航员将仪器与天体（如太阳或星星）对准，并记录其在地平线上的角度。然而，如果观察者的眼睛没有完美对齐于六分仪的指示镜，则读数可能会受到视差的影响。这可能导致导航中的错误，而这在海上可能是至关重要的。因此，理解六分仪的视差对于确保测量的准确性至关重要。为了减轻视差的影响，导航员经过培训以将眼睛直接放在指示镜后面。许多现代六分仪还配备了望远镜，帮助通过提供更清晰的视图来最小化视差错误。有些六分仪甚至配备了内置的调整功能，以考虑视差，从而允许更精确的读数。除了其技术含义外，六分仪的视差也提醒我们导航中精确性的重要性。导航员必须在其方法中一丝不苟，确保每个测量尽可能准确。角度测量中的小错误可能在长距离上转化为显著的位置差异，可能导致导航危险。此外，视差的概念不仅限于六分仪的使用。它是多个领域中的基本原理，包括天文学和摄影。在天文学中，视差用于确定恒星和其他天体与地球之间的距离。同样，在摄影中，视差可能影响图像的构图，特别是在使用两个镜头的立体摄影中。理解六分仪的视差不仅提高了导航员的技能，也加深了他们对导航科学的欣赏。它突显了技术与人类技能之间的微妙平衡，展示了即使是最小的细节也能对结果产生重大影响。随着导航员继续依赖传统方法和现代技术，从六分仪的视差中学到的经验教训将继续保持相关性。总之，六分仪的视差是导航员在测量时必须考虑的一个关键因素。通过理解和解决视差，导航员可以提高他们的准确性，确保安全航行。这一知识不仅增强了他们的实践技能，还丰富了他们对导航和观察更广泛原则的理解。