geoidal height

简明释义

大地水准面高度

英英释义

例句

1.The surveyor calculated the geoidal height to determine the elevation of the land above the mean sea level.

测量员计算了大地高程以确定土地高于平均海平面的高度。

2.In coastal areas, the geoidal height can significantly affect flood risk assessments.

在沿海地区，大地高程会显著影响洪水风险评估。

3.Engineers need to consider the geoidal height when designing bridges and tunnels.

工程师在设计桥梁和隧道时需要考虑大地高程。

4.Understanding the geoidal height is crucial for accurate GPS positioning.

理解大地高程对于准确的GPS定位至关重要。

5.The researcher used satellite data to analyze changes in geoidal height over time.

研究人员使用卫星数据分析了随时间变化的大地高程。

作文

Understanding the concept of geoidal height can significantly enhance our comprehension of Earth's shape and gravitational field. The geoidal height refers to the height of a point above the geoid, which is an equipotential surface that approximates mean sea level across the globe. This concept is crucial in various fields such as geodesy, oceanography, and even satellite navigation. In simple terms, if you were to stand on a mountain, the geoidal height would tell you how high you are compared to this theoretical surface of the Earth.The geoid itself is not a perfect sphere; rather, it is an irregular shape that reflects the varying gravitational forces exerted by the Earth's mass distribution. For instance, areas with denser materials beneath the surface will have a stronger gravitational pull, causing the geoid to bulge outward. Conversely, regions with less dense materials will result in a dip in the geoid. Understanding these variations is essential for accurate measurements in land surveying and construction projects.In addition to its applications in geodesy, the geoidal height plays a significant role in oceanography. Oceanographers utilize this measurement to understand sea level changes and their implications for climate change. By studying the geoidal height, scientists can assess how rising sea levels may affect coastal regions, ultimately aiding in the development of strategies to mitigate potential impacts.Furthermore, the geoidal height is vital for GPS technology. Global Positioning System satellites rely on precise measurements to provide accurate location data. The satellites must account for the geoidal height when determining a user's position, as the Earth's surface is not uniform. If the geoidal height is not accurately considered, it could lead to significant errors in positioning, which is particularly critical in applications like aviation and maritime navigation.Moreover, the study of geoidal height has led to advancements in understanding tectonic movements and natural disasters. By monitoring changes in the geoidal height, scientists can detect shifts in the Earth's crust, which may indicate seismic activity. This information is invaluable for predicting earthquakes and assessing risks in vulnerable regions.In conclusion, the concept of geoidal height is not only fundamental to geodesy but also has far-reaching implications in various scientific disciplines. From understanding the Earth's gravitational field to enhancing the accuracy of GPS systems, the geoidal height provides essential insights into our planet's dynamics. As technology advances and our understanding of Earth improves, the significance of geoidal height will undoubtedly continue to grow, highlighting the intricate relationship between our planet's physical characteristics and the challenges we face in a changing world.

理解地球高程的概念可以显著增强我们对地球形状和重力场的理解。地球高程是指某一点相对于大地水准面的高度，大地水准面是一个近似全球平均海平面的等势面。这个概念在大地测量、海洋学甚至卫星导航等多个领域中至关重要。简单来说，如果你站在一座山上，地球高程将告诉你你与这个理论表面相比有多高。大地本身并不是一个完美的球体；相反，它是一个不规则的形状，反映了地球质量分布所施加的不同重力。比如，地下有更密集材料的地方，将会产生更强的重力作用，使得大地向外隆起。相反，材料较少的地区则会导致大地凹陷。理解这些变化对于土地测量和建筑项目的准确测量至关重要。除了在大地测量中的应用外，地球高程在海洋学中也发挥着重要作用。海洋学家利用这一测量来理解海平面变化及其对气候变化的影响。通过研究地球高程，科学家可以评估海平面上升可能对沿海地区造成的影响，从而帮助制定应对潜在影响的策略。此外，地球高程对于GPS技术至关重要。全球定位系统卫星依赖精确的测量来提供准确的位置数据。卫星必须在确定用户位置时考虑地球高程，因为地球表面并不均匀。如果不准确考虑地球高程，可能会导致定位出现重大误差，这在航空和海事导航等应用中尤为关键。此外，地球高程的研究促进了对构造运动和自然灾害的理解。通过监测地球高程的变化，科学家可以检测到地壳的移动，这可能表明地震活动。这些信息对于预测地震和评估脆弱地区的风险来说非常宝贵。总之，地球高程的概念不仅是大地测量的基础，还在多个科学学科中具有深远的影响。从理解地球的重力场到提高GPS系统的准确性，地球高程为我们提供了对地球动态的重要见解。随着技术的进步和我们对地球理解的加深，地球高程的重要性无疑将继续增长，突显出我们星球的物理特征与我们在变化的世界中面临的挑战之间的复杂关系。