Simultaneous Rocket-Borne Beacon and In Situ Measurements of Equatorial Spread F - Intermediate Wavelength Results
Simultaneous Rocket-Borne Beacon and In Situ Measurements of Equatorial Spread F - Intermediate Wavelength Results
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同步火箭发射信标和赤道扩散 F 的原位测量 - 中间波长结果
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
K. Baker
中科院分区：
文献类型：
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作者：
C. Rino;R. Tsunoda;J. Petriceks;R. Livingston;M. Kelley;K. Baker
1979年7月17日，一枚携带四频相位相干信标和全套现场诊断仪器的高性能火箭发射到活跃的赤道扩展F。本文报道了信标位相闪烁和朗缪尔探测器数据的光谱分析结果。通过使用来自牛郎星雷达的同时反向散射数据，我们能够确定闪烁是在靠近突出的羽状结构和相关的耗尽的高密度区域发展的。在这些高密度区，现场光谱在500m的空间波长附近显示出明显的幂定律斜率变化。大尺度结构允许系统变化的幂定律指数一般小于2，这与大量的宽带卫星数据和最近分析的大气探索者E数据很好地一致。较小尺度的结构允许光谱指数远大于2。只有在对闪烁没有显著贡献的低密度区域，才能在k−2附近发现单一的整体幂定律。本文和一篇配套论文中的结果表明，当前的赤道扩散F理论需要对F区峰值附近和以上的理论进行改进。
A high-performance rocket carrying a four-frequency, phase-coherent beacon and full complement of in situ diagnostic instrumentation was launched into active equatorial spread F on July 17, 1979. In this paper we report the results of spectrally analyzing the beacon phase-scintillation and Langmuir probe data. By using simultaneous backscatter data from the Altair radar we were able to establish that the scintillation develops in high-density regions adjacent to the prominent plume structures and associated depletions. In these high-density regions the in situ spectra show a pronounced change in the power law slope near a spatial wavelength of 500 m. Larger scale structures admit a systematically varying power law index that is generally less than 2, in good agreement with a large body of Wideband satellite data and recently analyzed Atmospheric Explorer E data. Smaller-scale structures admit a spectral index much larger than 2. A single, overall power law near k−2 was found only in low-density regions that did not contribute significantly to the scintillation. The results presented here and in a companion paper suggest that refinements in the current theories of equatorial spread F near and above the F region peak are needed.