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Updated: Jul 28, 2026

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基于超光谱遥感数据的高度水中的甲度的反转方法.

Nan Wang1,2, Zhiguo Wang1,2, Pingping Huang1,2

  • 1College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, China.

Sensors (Basel, Switzerland)
|July 13, 2024
PubMed
概括

在超的戴海湖中监测叶绿素a对于水质至关重要. 将盐度数据纳入随机森林模型显著提高了对叶绿素a估计的遥感精度.

关键词:
大海水体是一个水体.叶绿素-一个度度.超光谱遥感数据的数据.盐度 盐度 盐度 盐度 盐度

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Introduction and Methods of Leveling01:26

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Leveling is a surveying procedure used to determine elevation differences between distant points. Elevation refers to the vertical distance above or below a reference datum, typically mean sea level (MSL). In the United States, elevations are often referenced to the mean sea level station at Father Point Rimouski along the St. Lawrence Seaway. To make the datum accessible, permanent markers are established throughout the region. These markers, called benchmarks, have known elevations. If the...
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Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...