• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >BeiDou Augmented Navigation from Low Earth Orbit Satellites
【2h】

BeiDou Augmented Navigation from Low Earth Orbit Satellites

机译：北斗增强低地球轨道卫星导航

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Currently, the Global Navigation Satellite System (GNSS) mainly uses the satellites in Medium Earth Orbit (MEO) to provide position, navigation, and timing (PNT) service. The weak navigation signals limit its usage in deep attenuation environments, and make it easy to interference and counterfeit by jammers or spoofers. Moreover, being far away to the Earth results in relatively slow motion of the satellites in the sky and geometric change, making long time needed for achieved centimeter positioning accuracy. By using the satellites in Lower Earth Orbit (LEO) as the navigation satellites, these disadvantages can be addressed. In this contribution, the advantages of navigation from LEO constellation has been investigated and analyzed theoretically. The space segment of global Chinese BeiDou Navigation Satellite System consisting of three GEO, three IGSO, and 24 MEO satellites has been simulated with a LEO constellation with 120 satellites in 10 orbit planes with inclination of 55 degrees in a nearly circular orbit (eccentricity about 0.000001) at an approximate altitude of 975 km. With simulated data, the performance of LEO constellation to augment the global Chinese BeiDou Navigation Satellite System (BeiDou-3) has been assessed, as one of the example to show the promising of using LEO as navigation system. The results demonstrate that the satellite visibility and position dilution of precision have been significantly improved, particularly in mid-latitude region of Asia-Pacific region, once the LEO data were combined with BeiDou-3 for navigation. Most importantly, the convergence time for Precise Point Positioning (PPP) can be shorted from about 30 min to 1 min, which is essential and promising for real-time PPP application. Considering there are a plenty of commercial LEO communication constellation with hundreds or thousands of satellites, navigation from LEO will be an economic and promising way to change the heavily relay on GNSS systems.
机译：当前，全球导航卫星系统（GNSS）主要使用中地球轨道（MEO）中的卫星来提供位置，导航和定时（PNT）服务。导航信号弱，限制了其在深度衰减环境中的使用，并且容易受到干扰或干扰物的干扰和伪造。此外，离地球较远会导致天空中的卫星相对缓慢运动并发生几何变化，从而需要很长时间才能达到厘米的定位精度。通过将低地球轨道（LEO）中的卫星用作导航卫星，可以解决这些缺点。在这一贡献中，从理论上研究和分析了从LEO星座导航的优势。由三颗GEO，三颗IGSO和24颗MEO卫星组成的中国北斗全球导航卫星系统的空间部分已通过LEO星座进行了模拟，其中LEO星座具有120个卫星，在10个轨道平面内以55度的倾角在近似圆形的轨道上（偏心率约为0.000001 ）约975公里的高度。借助模拟数据，评估了LEO星座增强全球中国北斗导航卫星系统（BeiDou-3）的性能，作为例证之一，表明了将LEO用作导航系统的前景。结果表明，一旦将LEO数据与BeiDou-3结合用于导航，卫星的能见度和精度的位置稀释度将得到显着改善，尤其是在亚太地区的中纬度地区。最重要的是，精确点定位（PPP）的收敛时间可以从大约30分钟缩短到1分钟，这对于实时PPP应用是必不可少的，并很有希望。考虑到有数百个或数千个卫星的大量商业LEO通信星座，从LEO导航将是改变GNSS系统上的中继的经济且有希望的方式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号