GBAS:根据σvig进行基础和可用性分析

IF 0.9 Q4 REMOTE SENSING
Weverton da Costa Silva, J. F. G. Monico
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引用次数: 0

摘要

摘要地面增强系统(GBAS)是一种用于引导飞机精确进近和着陆的系统,旨在取代目前世界上大多数机场使用的仪表着陆系统(ILS)。GBAS基于差分定位,参考站提供差分修正,以提高飞机的定位精度,并确保其他性能参数,如完整性、连续性和可用性。然而,在巴西等低纬度地区使用GBAS,电离层不规则的出现会影响全球导航卫星系统(GNSS)的性能,使其不符合航空的要求。本文基于类别进场类型- CAT i的性能要求,对由4个参考站组成的GNSS数据集的5种垂直电离层梯度变率情景进行了评估,其中1个参考站在静态模型中模拟带有GBAS的飞机。结果表明,电离层变率的增加和定位卫星的几何形状会影响GBAS的完整性和可用性。在电离层变率更为显著的情景下,CAT I方法的GBAS可用性损失了38.4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
GBAS: fundamentals and availability analysis according to σvig
Abstract Ground-based augmentation system (GBAS) was developed to guide aircraft precision approach and landing, aiming to replace the instrument landing system (ILS), which is currently used in most airports worldwide. GBAS based on differential positioning with reference stations that provide differential corrections to the aircraft to improve its positioning accuracy and ensure other performance parameters such as integrity, continuity, and availability. However, using GBAS in low latitude regions such as Brazil, the occurrence of ionospheric irregularities can affect global navigation satellite system (GNSS) performance so that it does not meet the requirements for aviation. This article evaluates five vertical ionospheric gradient variability scenarios for a GNSS data set of four reference stations, one station simulating an aircraft with GBAS in a static model based on performance requirements for Category Approach Type – CAT I. The results showed that the increase in the variability of the ionosphere and the geometry of satellites used in positioning could affect the integrity and availability of GBAS. In the scenario of more significant variability of the ionosphere evaluated, there was a loss of 38.4% of the availability of GBAS for the CAT I approach.
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来源期刊
Journal of Geodetic Science
Journal of Geodetic Science REMOTE SENSING-
CiteScore
1.90
自引率
7.70%
发文量
3
审稿时长
14 weeks
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