Results 71 to 80 of about 3,051 (167)

Historical aspects of radar atmospheric dynamics [PDF]

A review of the history of radar techniques which have been applied to atmospheric observation is given. The author starts with ionosphere observation with the ionosonde, symbolizing as it does the earliest history of radar observation, and proceeds to ...
Kato, Susumu
core   +1 more source

Simultaneous determine of Doppler shift and group delay time using amplitude modulated chirp-signal [PDF]

, 2014
New method of the simultaneous measurement of the frequency dependencies of Doppler shift and group delay time of separate ionosphere modes by means of amplitude modulated chirp signal is presented in this paper.
Kolchev, A. A., Nedopekin, A. E., Shumaev, V. V.   +2 more
core  

ナンキョク ショウワキチ ニオケル NLC ト PMSE ノ ドウジ カンソク [PDF]

, 2013
昭和基地における夜光雲(NLC)と極域夏季中間圏レーダーエコー(PMSE)の同時観測について報告する.2009 年2 月11 日の2000 UT から2130 UTの間,昭和基地の南側において夜光雲が目視観測された.同時に,昭和基地SuperDARN 短波レーダーが近距離レンジにおいて特徴的なエコーを観測した.このエコーは小さいドップラー速度とスペクトル幅を持ち,短波レーダーによって観測されるPMSEの特徴と調和的であるが,同じ時間帯にNLCが観測されたことから,この特徴的な近距離エコーがPMSE ...
Akira Kadokura, Akira Sessai Yukimatu, Keisuke Hosokawa, Natsuo Sato, Tadahiko Ogawa, Yasuo Takeda, 佐藤 夏雄, 小川 忠彦, 武田 康男, 細川 敬祐, 行松 彰, 門倉 昭   +11 more
core   +1 more source

Exploring the Interior of Europa with the Europa Clipper. [PDF]

Space Sci Rev, 2023
Roberts JH, McKinnon WB, Elder CM, Tobie G, Biersteker JB, Young D, Park RS, Steinbrügge G, Nimmo F, Howell SM, Castillo-Rogez JC, Cable ML, Abrahams JN, Bland MT, Chivers C, Cochrane CJ, Dombard AJ, Ernst C, Genova A, Gerekos C, Glein C, Harris CD, Hay HCFC, Hayne PO, Hedman M, Hussmann H, Jia X, Khurana K, Kiefer WS, Kirk R, Kivelson M, Lawrence J, Leonard EJ, Lunine JI, Mazarico E, McCord TB, McEwen A, Paty C, Quick LC, Raymond CA, Retherford KD, Roth L, Rymer A, Saur J, Scanlan K, Schroeder DM, Senske DA, Shao W, Soderlund K, Spiers E, Styczinski MJ, Tortora P, Vance SD, Villarreal MN, Weiss BP, Westlake JH, Withers P, Wolfenbarger N, Buratti B, Korth H, Pappalardo RT, Interior Thematic Working Group.   +61 more
europepmc   +1 more source

Overview of Promising Solutions in Subsurface Sounding Equipment. [PDF]

Sensors (Basel), 2023
Bryakin IV, Bochkarev IV, Khramshin VR, Gasiyarov VR.   +3 more
europepmc   +1 more source

Complexity and Nonlinear Dependence of Ionospheric Electron Content and Doppler Frequency Shifts in Propagating HF Radio Signals within Equatorial Regions

Atmosphere
The abundance of ions within the ionosphere makes it an important region for both long range and satellite communication systems. However, characterizing the complexity in the ionosphere within the equatorial region of Abuja, with geographic coordinates ...
Aderonke Akerele, Babatunde Rabiu, Samuel Ogunjo, Daniel Okoh, Anton Kascheyev, Bruno Nava, Olawale Bolaji, Ibiyinka Fuwape, Elijah Oyeyemi, Busola Olugbon, Jacob Akinpelu, Olumide Ajani   +11 more
doaj   +1 more source

Kharkiv incoherent scatter facility [PDF]

, 2014
The structure, parameters and operating modes of the incoherent scatter radar of the Institute of Ionosphere, Kharkiv are presented. Some results of the ionosphere research obtained by this facility are shown.Наведено структуру, параметри і режими роботи
Bogomaz, O. V., Chepurnyy, Ya. M., Chernyaev, S. V., Domnin, I. F., Emelyanov, L. Ya., Iskra, D. A., Kononenko, A. F., Kotov, D. V.   +7 more
core  

Driving Influences of the Doppler Flash Observed by SuperDARN HF Radars in Response to Solar Flares. [PDF]

J Geophys Res Space Phys, 2022
Chakraborty S, Qian L, Baker JBH, Ruohoniemi JM, Kuyeng K, Mclnerney JM.   +5 more
europepmc   +1 more source

Cross-Layer Design to Maintain Earthquake Sensor Network Connectivity After Loss of Infrastructure

, 2012
We present the design of a cross-layer protocol to maintain connectivity in an earthquake monitoring and early warning sensor network in the absence of communications infrastructure. Such systems, by design, warn of events that severely damage or destroy
Steinbrecher, Greg
core   +1 more source

Gravity waves in the middle atmosphere: Recent progress and needed studies [PDF]

, 1986
The recent recognition of the important role played by gravity waves in the large-scale circulation and thermal structure of the mesosphere and lower thermosphere has stimulated considerable research on their properties and their middle atmosphere ...
Fritts, D. C.
core   +1 more source