[PDF] Top 20 Combined radar observations of equatorial electrojet irregularities at Jicamarca
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Combined radar observations of equatorial electrojet irregularities at Jicamarca
... both at VHF and UHF frequencies have Doppler shift magnitudes gen- erally decreasing with altitude between 99–105 km, albeit more rapidly at VHF than ...basis of the the- ory outlined in Appendix A, ... See full document
17
Daytime vertical E × B drift velocities inferred from ground‐based magnetometer observations at low latitudes
... strength of the electrojet is to observe the difference in the magnitudes of the horizontal (H) component between a magnetometer placed directly on the magnetic equator and one displaced 6--9 ... See full document
9
Radar cross sections for mesospheric echoes at Jicamarca
... Abstract. Radar cross sections (RCS) of mesospheric layers at 50 MHz observed at Jicamarca, Peru, range from 10 −18 to 10 −16 m −1 , three orders of magnitudes smaller than cross ... See full document
10
First meteor radar observations of tidal oscillations over Jicamarca (11.95° S, 76.87° W)
... Most of them showed that migrating tides are the most prominent components and the diurnal tide is stronger than the semidiurnal ...One of the earliest equatorial meteor radar experiments ... See full document
9
On the characteristics of 150-km echoes observed in the Brazilian longitude sector by the 30 MHz São Luís radar
... Observations of non-thermal scattering of radio waves occur- ring at approximately 150-km altitude in the equatorial iono- sphere were first reported by Balsley (1964) based on mea- ... See full document
12
Concurrent observations at the magnetic equator of small-scale irregularities and large-scale depletions associated with equatorial spread F
... center of the image and plot pixel value as a function of distance from the center of the ...start at 21:49 because the airglow is too dim early in the night due to the F peak being too high ... See full document
14
Magnetic aspect sensitivity of 3‐m F‐region field‐aligned plasma density irregularities over Jicamarca
... introduced at Jicamarca by Farley et ...distribution of backscatter intensity versus bearing in the sky, is the two ‐ dimensional Fourier transform of the visibility, the spatial ... See full document
9
Observations of meteor-head echoes using the Jicamarca 50 MHz radar in interferometer mode
... meteor-head observations at a unique frequency (50 MHz) and location (equatorial latitudes), our results are particularly important for the 3-D characteriza- tion of meteor ...shown, at ... See full document
11
Ion gyroresonance observations at Jicamarca revisited
... number of artificial satellites are the main obstacles for topside IS radar ...topside observations at the magnetic equator were made in the mid-1960’s [Farley, 1966], but only recently have ... See full document
6
Simultaneous 6300 Å airglow and radar observations of ionospheric irregularities and dynamics at the geomagnetic equator
... small-scale irregularities, but recently Rodrigues et ...field of view are only visible after 04:00 UT yet there are large plumes of irregularities visible in the RTI plots ...conditions ... See full document
15
High altitude large-scale plasma waves in the equatorial electrojet at twilight
... JULIA observations, this phe- nomenon occurs very often. The source of these echoes has not been ...upward electrojet currents known to be present in the vicinity of the solar ...enhancement ... See full document
6
Effects of large horizontal winds on the equatorial electrojet
... the equatorial lower thermosphere and the realization that wind speeds in excess of 150 m/s are commonplace in the E region invite an examination of the consequences for the equatorial ... See full document
12
AMISR-14: Observations of equatorial spread F
... The observations also show a high degree of variability in the morphology of bottomside echoes from beam to ...to irregularities and by their highly dynamic behavior as they evolve and drift ... See full document
9
Radio and optical techniques for locating equatorial plasma irregularities
... scintillation-causing irregularities in three dimensions using radio occultation and airglow ...study of equatorial plasma irregularities from the central Pacific ...some of the ... See full document
151
D and E region incoherent scatter radar density measurements over Jicamarca
... measurements of electron densities at equatorial latitudes, using the Jicamarca ...from equatorial electrojet irregularities ...case of D region densities, normally ... See full document
7
Multistation digisonde observations of equatorial spread F in South America
... the radar ranges to the vertical and oblique echoes and the direction from which the echoes arrive, it is possible to calculate the approximate horizontal distances to the depletions and plot them as a func- tion ... See full document
9
Climatology of postsunset equatorial spread F over Jicamarca
... using radar observations at the Jicamarca Radio Observatory, Peru (12°S, ...description of the characteristics of spread F scattering layers observed with the Jicamarca ... See full document
7
Initial MST radar observations of upper tropospheric-lower stratospheric duct-like structures over Jicamarca, Peru
... ified at the beginning of the run and not allowed to vary in ...stratosphere at equatorial ...jet of maximum amplitude of − 15 m s −1 , centroid altitude of 15 km, 1-σ RMS ... See full document
9
Jicamarca radar observations of the diurnal and semidiurnal tide in the troposphere and lower stratosphere
... topographic irregularities in surface heating that are coupled to the atmosphere by turbulent processes and land-sea contrast ...amplitudes of the diurnal tidal winds in the tropical lower stratosphere (24 ... See full document
11
Study of Coulomb collisions and magneto-ionic propagation effects on incoherent scatter radar measurements at Jicamarca
... power at low ...detected at these altitudes. For instance, echoes from the electrojet at 100 km altitude or from the so-called 150-km region can be measured daily at Jicamarca ... See full document
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