منابع مشابه
Radar studies of mid-latitude ionospheric plasma drifts
We use incoherent scatter radar measurements from Millstone Hill and Saint Santin to study the midlatitude F region electrodynamic plasma drifts during geomagnetically quiet and active periods. We present initially a local time, season, and solar flux dependent analytical model of the quiet time zonal and meridional ExB drifts over these stations. We discuss, for the first time, the Saint Santi...
متن کاملIonospheric Backscatter Observations at Millstone Hill
Studies of the electron-density, e Iectron and ion temperatures in the F-region were mode by means of ground-based radar observations O? the M; I Istone Hi I I Radar Observato~. A 70-meter parabol i. ontenna directed vertical Iy and o 2. 5-Mw pulse radar operating at 440 Mcps were employed for these measurements which were conducted for periods of 30 hours at approximately weekly intervals thro...
متن کاملAtmospheric Motions from Sodium Cloud Drifts at Four Locations
Atmospheric motions from 54 sodium cloud firings are examined in the 80-200-km. height region. To gain an insight into various types of motion that are presumably present in the total observed wind, an oscillatory component assigned to internal gravity waves, and the residual motion containing tides and prevailing wind, are studied. Data from apparent movements of ionospheric irregularities see...
متن کاملDRIFTS Sensor: Soil Carbon Validation at Large Scale (Pantelleria, Italy)
A fast and accurate measurement of soil carbon is needed in current scientific issues. Today there are many sensors suitable for these purposes, but choosing the appropriate sensor depends on the spatial scale at which the studies are conducted. There are few detailed studies that validate these types of measures allowing their immediate use. Here it is validated the quick use of a sensor in ex...
متن کاملOn Divergence-free Drifts
We investigate the validity and failure of Liouville theorems and Harnack inequalities for parabolic and elliptic operators with low regularity coefficients. We are particularly interested in operators of the form ∂t−∆+ b ·∇ resp. −∆+ b ·∇ with a divergence-free drift b. We prove the Liouville theorem and Harnack inequality when b ∈ L∞(BMO) resp. b ∈ BMO−1 and provide a counterexample demonstra...
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ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1957
ISSN: 0004-9506
DOI: 10.1071/ph570378