An Analysis of Apparent-Motion Vectors in, and the Structure of, A Mid-Latitude Sporadic E Layer Using a 2.66 MHZ Radar.

作者： Timothy D Halderman

DOI:

关键词: Internal wave 、 Geodesy 、 Radar imaging 、 Atmosphere 、 Radar 、 Geography 、 Middle latitudes 、 Altitude 、 Thermosphere 、 Sporadic E propagation

摘要: Abstract : We used the 2.66 MHz Imaging Middle-Atmosphere Geophysical Radar (IMAGER) located at Boot Lake, Colorado, to collect data on midlatitude sporadic E layers found near 100 km. Analysis of shows apparent-motion vectors, in a 20 km altitude range and layers, 200-300 m/s one occasion 160 another. In each case, these motions were toward west south. interpret results as phase internal gravity waves, or ripples, moving through lower thermosphere, rather than bulk wind motions. Possible atmosphere source regions for waves are identified. The appeared consist irregularly shaped patches with scale sizes being approximately 15km. heights individual vary much 3 while mean height layer varied from 106 low 96 also had 5-point tilting-filter photometer available which enabled us calculate apparent-motions similar altitudes. showed motion north m/s, significantly different, both direction speed, radar.

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An Analysis of Apparent-Motion Vectors in, and the Structure of, A Mid-Latitude Sporadic E Layer Using a 2.66 MHZ Radar.

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An Analysis of Apparent-Motion Vectors in, and the Structure of, A Mid-Latitude Sporadic E Layer Using a 2.66 MHZ Radar.

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