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Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

128
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

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Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
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Circular Orbits and Critical Velocity for Satellites01:16

Circular Orbits and Critical Velocity for Satellites

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The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
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相关实验视频

Updated: Sep 16, 2025

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
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基于模拟比较方法的空间目标监视星座的设计.

Qinying Hu1,2, Desheng Liu1,2, Ziwei Dong1

  • 1School of Space Information, Space Engineering University, Beijing 101416, China.

Sensors (Basel, Switzerland)
|July 12, 2025
PubMed
概括
此摘要是机器生成的。

一种新方法设计了低地球轨道的太空目标监视星座. 模拟显示,在太阳同步轨道上的异质星座可以追踪超过80%的目标,提高空间局势意识.

关键词:
一个星座的配置配置.模拟比较方法模拟比较方法太空目标监视空间目标监视

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科学领域:

  • 太空科学 太空科学
  • 天体动力学是指天体动力学.
  • 卫星技术 卫星技术 卫星技术

背景情况:

  • 空间局势意识 (SSA) 对于低地球轨道 (LEO) 操作至关重要.
  • 现有的SSA系统在实现LEO目标的全域,全时覆盖方面面临挑战.
  • 对于先进的基于太空的监视星座的需求正在增加.

研究的目的:

  • 为空间目标意识星座提出基于模拟的设计方法.
  • 开发一个异构的星座配置,以加强低极点的监视.
  • 评估拟议的星座在满足监视任务要求方面的有效性.

主要方法:

  • 对LEO空间目标轨道分布的系统分析.
  • 设计LEO监视任务模式,关键指标和约束.
  • 构建三个基本的星座配置.
  • 基于分层轨道分布的监控对象的随机抽样.
  • 模拟比较,以选择一个最佳的异质星座.

主要成果:

  • 在一个太阳同步的早晨和黄昏轨道上确定了一个异质的太空目标监视星座.
  • 选择的星座符合定义的监视任务模型和能力要求.
  • 实验结果表明,星座能够提供令人满意的观测弧段.

结论:

  • 拟议的基于模拟的设计方法对于开发LEO监视星座是有效的.
  • 鉴定的异质星座配置显著提高了SSA的能力.
  • 星座可以对80%以上的LEO目标进行目录和跟踪,提高空间领域的认识.