Multiyear Detection, Classification and Hypothesis of Ionospheric Layer Causing GNSS Scintillation

Multiyear Detection, Classification and Hypothesis of Ionospheric Layer Causing GNSS Scintillation
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引起 GNSS 闪烁的电离层的多年探测、分类和假设

DOI:
10.1029/2021rs007328
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发表时间:
2021
期刊:
影响因子:
1.6
通讯作者:
Hampton, Donald L.
Hampton, Donald L.
中科院分区:
计算机科学4区
文献类型:
--
作者:
Datta‐Barua, Seebany;Llado Prat, Pau;Hampton, Donald L.

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本文调查了6年的全球定位系统(GPS)L1和L2C电离层闪烁在极光区,并与配置的非相干散射雷达,假设电离层的不规则层。闪烁极光全球定位系统阵列的六个闪烁接收器位于扑克平坦的研究范围,阿拉斯加,是扑克平坦的非相干散射雷达(PFISR)。闪烁间隔在阵列的至少四个接收器上使用S4和sigma phi(σφ)指数以100 s节奏识别。通过分析升高的S4和σφ的常见时间间隔,将闪烁分类为“振幅”、“相位”或“相位和振幅两者”。基于闪烁事件发生时的PFISR峰值密度高度,假设全球导航卫星系统(GNSS)波因折射或衍射效应而产生的散射发生在E层或F层,或其间的过渡层。我们分析了从2014年到2019年的不规则层的统计数据,跨越了太阳能极大值到太阳能极小值。随着太阳活动周期的减弱,我们发现每天的闪烁事件越来越少,几乎所有的闪烁都是相位闪烁。我们还发现,事件的百分比假设是由E层的不规则性增加与下降的太阳周期。相位振荡的当地时间依赖性主要是在夜间和E层。相位闪烁事件发生在白天发生在太阳极大期,几乎都在F层。在2014年太阳活动极大期,大多数包含振幅振荡的事件发生在白天的F层。
This paper surveys six years of Global Positioning System (GPS) L1 and L2C ionospheric scintillation in the auroral zone and, with a collocated incoherent scatter radar, hypothesizes the ionospheric irregularity layer. The Scintillation Auroral GPS Array of six scintillation receivers is sited at Poker Flat Research Range, Alaska, as is the Poker Flat incoherent scatter radar (PFISR). Scintillation intervals are identified across at least four receivers of the array using S4 and sigma phi (σφ) indices at 100 s cadence. Classification as "amplitude," "phase," or "both-phase-and-amplitude" scintillation is performed by analyzing common time intervals of elevated S4 and σφScattering of Global Navigation Satellite System (GNSS) waves by refractive or diffractive effects is hypothesized to occur in the E or F layer, or a transition layer in between, based on the PFISR peak density altitude at the time of the scintillation event. We analyze the statistics of the irregularity layer from 2014 to 2019, spanning solar maximum to solar minimum. We find fewer scintillation events per day with the waning solar cycle, nearly all of them phase scintillations. We also find that the percentage of events hypothesized to be caused by irregularities in the E layer increases with the declining solar cycle. The local time dependence of phase scintillations is primarily at night and in the E layer. Phase scintillation events occurring during daytime occur at solar maximum and are nearly all in the F layer. The majority of the events containing amplitude scintillations are daytime F layer at solar maximum (2014).
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