First light from a kilometer-baseline Scintillation Auroral GPS Array.
First light from a kilometer-baseline Scintillation Auroral GPS Array.
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DOI：
10.1002/2015gl063556
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发表时间：
2015-05-28
影响因子：
5.2
通讯作者：
Crowley G
中科院分区：
文献类型：
--
作者：
Datta-Barua S;Su Y;Deshpande K;Miladinovich D;Bust GS;Hampton D;Crowley G
我们介绍并分析了 2013 年底在极光区建立的一系列紧密间隔的全球定位系统 (GPS) 闪烁接收器的第一批数据，这些接收器用于测量 100-1000 m 和亚秒尺度的 L 波段信号的空间和时间变化。闪烁极光 GPS 阵列 (SAGA) 的七个接收器位于阿拉斯加的 Poker Flat 研究范围。接收器产生 100 秒闪烁指数和 100 赫兹载波相位以及原始同相和正交相位样本。 SAGA 是现有最大的阵列，在 L 波段具有电离层衍射菲涅尔刻度的基线长度。通过五个接收器的初始阵列，我们确定了同时幅度和相位闪烁的周期。我们将 SAGA 功率和相位数据与极光弧和非相干散射雷达电子降水测量的并置 630.0nm 全天空图像进行比较，以说明 SAGA 如何用于亚公里级研究的多仪器观测。七个接收器的闪烁极光 GPS 阵列 (SAGA) 现已位于阿拉斯加的 Poker Flat SAGA 是最大的亚千米阵列，可用于相位/不规则性研究 可同时观测闪烁、极光弧和电子沉淀
We introduce and analyze the first data from an array of closely spaced Global Positioning System (GPS) scintillation receivers established in the auroral zone in late 2013 to measure spatial and temporal variations in L band signals at 100–1000 m and subsecond scales. The seven receivers of the Scintillation Auroral GPS Array (SAGA) are sited at Poker Flat Research Range, Alaska. The receivers produce 100 s scintillation indices and 100 Hz carrier phase and raw in-phase and quadrature-phase samples. SAGA is the largest existing array with baseline lengths of the ionospheric diffractive Fresnel scale at L band. With an initial array of five receivers, we identify a period of simultaneous amplitude and phase scintillation. We compare SAGA power and phase data with collocated 630.0 nm all-sky images of an auroral arc and incoherent scatter radar electron precipitation measurements, to illustrate how SAGA can be used in multi-instrument observations for subkilometer-scale studies. A seven-receiver Scintillation Auroral GPS Array (SAGA) is now at Poker Flat, Alaska SAGA is the largest subkilometer array to enable phase/irregularities studies Simultaneous scintillation, auroral arc, and electron precipitation are observed