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Mostrando 10 de un total de 157 resultados de la comunidad: Ciencias del Geoespacio y Astronomía. (0.078 segundos)
Mostrando ítems 1-10 de 157
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(Instituto Geofísico del Perú, 1989-09-01)"Incoherent scatter radar measurements at Jicamarca are used to study the effects of large solar fluxes and magnetic activity on the F region vertical plasma drifts. The average drifts from the two last solar maxima are almost identical except in the late afternoon-early evening sector where their ... -
(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, 2006-06-20)"The short‐term relationship of the equatorial peak electron density and the solar short‐wavelength irradiance is examined using foF2 observations from Jicamarca, Peru and recent solar irradiance measurements from satellites. Solar soft X‐ray measurements from both the Student Nitric Oxide Explorer ... -
(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, 1996-12-01)"A spaced-antenna scintillation system was installed at Ancon, Peru, in May 1994 to measure scintillation of 250-MHz signals from a geostationary satellite by three antennas spaced in the magnetic east-west direction. These measurements were used to establish the climatology of the zonal drift of the ... -
(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 ...
Mostrando ítems 1-10 de 157
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