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High-resolution observations of mesospheric layers with the Jicamarca VHF Radar
(Elsevier, 2007)
We report new results from the 50-MHz Jicamarca radar in Peru (12°S, 77°W), which is able to observe backscatter from the daytime mesosphere on any given day. Since 2005, the radar has been operated in a high-power MST-ISR ...
Sudden disappearance of vhf radar echoes from equatorial e-region irregularities
(Council of Scientific and Industrial Research, 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 ...
Using vertically pointing broad beam to measure atmospheric aspect sensitivity of VHF radar echoes
(1989)
Conventionally, atmospheric aspect sensitivlty of VHF radar echoes is measured using a narrow beam radar in order to avoid the complications due to broad beam effects. However, in this study, a new technique using beam ...
Low-latitude quasiperiodic echoes observed with the Piura VHF radar in the E region
(American Geophysical Union, 1999-07-01)
We present the first quasiperiodic (QP) echoes from 3‐m E region field‐aligned irregularities observed in the Southamerican sector, just outside the magnetic equator (7.5°N geomagnetic). These QP echoes occur only at night ...
First observation of the upper stratospheric vertical wind velocities using the Jicamarca VHF radar
(American Geophysical Union, 1993-10)
The Jicamarca VHF radar (50 MHz) has detected atmospheric echoes in the so-called "gap region" from 30 to 60 km heights. These echoes are, for the first time, discriminated from clutter echoes, using both co-polarized ( ...
VHF doppler radar backscatter measurements through the entire neutral atmosphere (15-95 km) above Jicamarca, Perú
(1980)
The Jicamarca 50-MHz radar was used to obtain backscattered echoes through the entire atmosphere (0-100 km). Previous radar observations at VHF have shown a gap near the 35-55 km region, where the lack of echoes is attributed ...
Characteristics of low latitude backscatter from ionospheric E region and F region field-aligned irregularities obtained with the Piura VHF radar
(Instituto Geofísico del Perú, 2003)
We present a summary ofthe characteristics of echoes from ionospheric (E and F region) field-aligned irregularities obtained with the Piura VHF radar (~7.0° dip latitude, outside the equatorial electrojet region). Our ...
Unusual spectral and temporal characteristics of equatorial electrojet irregularities observed with the Jicamarca VHF radars
(Instituto Geofísico del Perú, Radio Observatorio de Jicamarca, 2005)
Equatorial electrojet (EEJ) field-aligned irregularities have been studied intensively using radars and in-situ rocket-bome sensors since early 1960s. Their main characteristics are well known. For example, two types of ...
Aspect sensitivity measurements of VHF backscatter made with the Chung‐Li radar: Plausible mechanisms
(American Geophysical Union, 1989-03)
A new technique, using beam broadening effects, has been developed to measure the aspect sensitivity of atmospheric clear air VHF radar echoes. It uses the relatively broad antenna beam of the vertical‐pointing antenna of ...
Statistics of 150-km echoes over Jicamarca based on low-power VHF observations
(European Geosciences Union (EGU), 2006-01)
In this work we summarize the statistics of the socalled 150-km echoes obtained with a low-power VHF radar operation at the Jicamarca Radio Observatory (11.97◦ S, 76.87◦ W, and 1.3 ◦ dip angle at 150-km altitude) in Peru. ...