8 hasil untuk "J. W. Meriwether"
Menampilkan 1–8 · 1,20 detik · RSS
-
Artikel Jurnal Teks lengkap
Initial daytime and nighttime SOFDI observations of thermospheric winds from Fabry-Perot Doppler shift measurements of the 630-nm OI line-shape profile
In this paper we present both night and day thermospheric wind observations made with the Second-generation, Optimized, Fabry-Perot Doppler Imager (SOFDI), a novel triple-etalon Fabry-Perot interferometer (FPI) designed to make 24-h measurements of thermospheric winds from OI 630-nm emission. These…
-
Artikel Jurnal
Thermospheric wind and temperature observations from El Leoncito Observatory in southern South America
A Fabry–Perot interferometer (FPI) installed at El Leoncito Observatory, Argentina (31.8o S, 69.3o W, 18o mag lat), provides data on neutral winds and temperature over southern South America, a region lacking ground-based thermospheric observations. We present the climatology of neutral winds…
-
Artikel Jurnal
Fabry-Perot interferometer observations of sustained strong vertical wind activity in the auroral thermosphere
The vertical component of the neutral wind velocity is critical for understanding the thermospheric dynamics at high latitudes. The neutral vertical wind circulation, driven by auroral activity, redistributes heat and momentum within the lower and upper thermosphere between 100 and 500 km. This…
-
Artikel Jurnal
Simultaneous detection of vertical wind oscillations and total electron content fluctuations from El Leoncito Observatory (31.8 S, 69.3 W)
Fabry-Perot interferometer (FPI) observations of vertical and horizontal winds and temperatures obtained on the nights of 18–19, 19–20, and 20–21 October 2023, and selected nights on May 2024, December 2024, and March 2025 from El Leoncito Observatory (31.8°S, 69.3°W) exhibit vertical wind…
-
Artikel Jurnal Teks lengkap
Effects of the midnight temperature maximum observed in the thermosphere–ionosphere over the northeast of Brazil
The midnight temperature maximum (MTM) has been observed in the lower thermosphere by two Fabry–Pérot interferometers (FPIs) at São João do Cariri (7.4° S, 36.5° W) and Cajazeiras (6.9° S, 38.6° W) during 2011, when the solar activity was moderate and the solar flux was between 90 and 155 SFU (1…
-
Artikel Jurnal Teks lengkap
New results on the mid-latitude midnight temperature maximum
Fabry–Perot interferometer (FPI) measurements of thermospheric temperatures and winds show the detection and successful determination of the latitudinal distribution of the midnight temperature maximum (MTM) in the continental mid-eastern United States. These results were obtained through the…
-
Artikel Jurnal
Thermosphere response to the May 2024 geomagnetic storm over the South American sector
We examined the thermospheric wind and temperature response over the South American sector during the main and early recovery phases of the 10–11 May 2024 geomagnetic superstorm. Our coordinated set of Fabry-Perot Interferometer (FPI), satellite-derived, and radar observations were obtained from…
-
Artikel Jurnal Teks lengkap
Intrinsic parameters of periodic waves observed in the OI6300 airglow layer over the Brazilian equatorial region
Periodic waves were observed in the OI6300 airglow images over São João do Cariri (36.5° W, 7.4° S) from 2012 to 2014 with simultaneous observations of the thermospheric wind using two Fabry–Pérot interferometers (FPIs). The FPIs measurements were carried out at São João do Cariri and Cajazeiras…