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Mostrando 10 de un total de 159 resultados de la comunidad: Ciencias del Geoespacio y Astronomía. (0.1 segundos)
Mostrando ítems 1-10 de 159
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(Instituto Geofísico del Perú, 1980-03)"The 53.5-MHz radar of the Max-Planck-Institut für Aeronomie (SOUSY-VHF-Radar) was specifically designed for the study of the dynamics of the troposphere, stratosphere, and mesosphere including turbulence and other small-scale phenomena. Transmitter and receivers were designed for a pulse width and ... -
(Instituto Geofísico del Perú, 2012-02-20)"A correlation of the ionospheric electric field and the time derivative of the magnetic field was noticed over thirty years ago and has yet to be explained. Here we report on another set of examples during the superstorm of November 2004. The electric field in the equatorial ionosphere, measured with ... -
(Instituto Geofísico del Perú, 1982-07)"The 430 MHz, 2 MW radar at the Arecibo Observatory is currently being used as a stratospheric-troposheric (ST) radar. One of the problems in the automatic analysis of the signals come from the very large amplitude of the ground clutter echoes. The problem is agravated by the fading of these signals, ... -
(Instituto Geofísico del Perú, 1985-11)"Processing techniques for the estimation of the power, the frequency shift, and the spectral width of mesosphere-stratosphere-troposphere (MST) radar returns are presented. The differential techniques are compared in terms of statistical goodness of the estimators and in terms of computational ... -
(Instituto Geofísico del Perú, 2012-10-25)"A new technique is presented for the incorporation of ionosonde observations into GPS ionospheric tomography. This approach greatly improves the vertical resolution of the images when using independent incoherent scatter radar observations as ground truth, addressing a traditional weakness of tomographic ... -
(Instituto Geofísico del Perú, 2003-07)"Using data collected during the September 1999 combined ionospheric campaign (CIC), we examine the effects of moderate geomagnetic activity on low and mid-latitudes. Perturbations in the zonal electric field, measured at both Jicamarca and Arecibo, are the most striking aspect of this data. These ... -
(Instituto Geofísico del Perú, 1988)"Simultaneous Fabry-Perot Interferometer (FPI) and Incoherent Scatter Radar (ISR) observations from Arequipa and Jicamarca, Peru, respectively, were obtained on 24 and 25 September 1986, during which there was substantial geomagnetic activity. Comparison of the neutral thermosphere's zonal velocity ... -
(Instituto Geofísico del Perú, 1977-01)"The Modified Range Time lntensity Technique for studying the height variation of the (back-scatter power of vhf radar echoes at Jicamarca has been used to show that the growth lime of E-region irregularities is less than 1 min. Further, these irregularities disappear or reappear precisely at the time ... -
(Instituto Geofísico del Perú, 1990-08)"Spectral and cross-spectral signatures of lower mesospheric radar returns are investigated and modeled. Aspect sensitivity of radar echoes and the horizontal, vertical, and random components of atmospheric fluid velocity are estimated. Estimated random velocity magnitudes of ~0.2 m/s during a specific ... -
(Instituto Geofísico del Perú, 2004-11)Recently, Sulzer and Gonzalez (J. Geophys. Res. 104 (22) (1999) 22, 535) showed that the previously neglected effect of electron–electron and electron–ion Coulomb collisions has a significant impact on determining the incoherent scatter autocorrelation functions (IS-ACFs) observed at Jicamarca. ...
Mostrando ítems 1-10 de 159
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