Buscar
Mostrando ítems 41-50 de 713
Observed diurnal and seasonal behavior of the micrometeor flux using the Arecibo and Jicamarca radars
(Elsevier, 2005-09)
In this paper, we present results from meteor head-echo observations using the 430 MHz dual beam Arecibo radar in Puerto Rico and the 50 MHz Jicamarca radar in Peru. We show that the seasonal behavior reflected in the fast ...
Remote sensing lower thermosphere wind profiles using non-specular meteor echoes
(American Geophysical Union, 2009-05-12)
This article describes a new method of measuring wind velocity profiles between 93 km and 110 km altitude by tracking non‐specular meteor echoes as neutral winds transport the plasma trails. This requires a large VHF radar ...
Effect of meteor ionization on sporadic-E observed at Jicamarca
(American Geophysical Union, 2008-08-09)
Relatively little progress has been made in the study of equatorial Sporadic-E when compared to the study of mid-latitude Sporadic-E. Indeed, it is unclear if Sporadic-E has been observed at all near the geomagnetic equator ...
Inverse filtering of radar signals using compressed sensing with application to meteors
(American Geophysical Union, 2012-09-12)
Compressed sensing, a method which relies on sparsity to reconstruct signals with relatively few measurements, provides a new approach to processing radar signals that is ideally suited to detailed imaging and identification ...
Using non-spectacular radar meteor echoes to monitor lower thermosphere wind profiles
(Instituto Geofísico del Perú, 2009)
We present a new method of measuring lower thermospheric wind velocity profiles by tracking non‐specular meteor echoes in time. This approach relies on having a radar following plasma irregularities as they are dragged by ...
Observations of an Unexpected Meteor Shower Outburst at High Ecliptic Southern Latitude and Its Potential Origin
(Institute of Physics Publishing, 2020-05)
A strong and unexpected meteor shower outburst was observed by the Southern Argentina Agile MEteor Radar Orbital System (SAAMER-OS) at high southern ecliptic latitude within the South Toroidal region. The outburst, which ...
An initial meteoroid stream survey in the southern hemisphere using the Southern Argentina Agile Meteor Radar (SAAMER)
(Elsevier, 2013-04)
We present in this manuscript a 4 year survey of meteor shower radiants utilizing the Southern Argentina Agile Meteor Radar (SAAMER). SAAMER, which operates at the southern most region of South America, is a new generation ...
Southern Argentina Agile Meteor Radar: System design and initial measurements of large-scale winds and tides
(American Geophysical Union, 2010-09)
The Southern Argentina Agile Meteor Radar (SAAMER) was installed at Rio Grande on Tierra del Fuego (53.8°S, 67.8°W) in May 2008 and has been operational for ∼24 months. This paper describes the motivations for the radar ...