50 MHz continuous wave interferometer observations of the unstable mid-latitude E-region ionosphere

Type-1 echoes from the mid-latitude E-Region ionosphere

This paper presents more data on the properties of type-1 irregularities in the nighttime midlatitude E-region ionosphere. The measurements were made with a 50-MHz Doppler radar system operating in Crete, Greece. The type-1 echoes last from several seconds to a few minutes and are characterized by narrow Doppler spectra with peaks corresponding to wave phase velocities of 250–350 m/s. The avera...

Numerical simulation of mid-latitude ionospheric E-region based on SEEK and SEEK-2 observations

Observational campaigns of the mid-latitude ionosphericE-region with sounding rockets and ground-based instruments were conducted in 1996 (SEEK) and 2002 (SEEK2). Both of them were successfully conducted to bring important findings about the mid-latitude E-region and quasiperiodic (QP) VHF radar echoes. The observational results in the SEEK and the SEEK-2 are compared with numerical simulations...

Mid-latitude Vertical Transmission of Geomagnetic Micropulsations through the Ionosphere

A Wave-driven Nonlinear Current in the E-region Ionosphere

Ionospheric two-stream waves and gradient-drift waves nonlinearly drive a large-scale (D.C.) current in the E-region ionosphere. This current ows parallel to, and with a comparable magnitude to, the fundamental Pedersen current. The underlying mechanism is quite simple. E-region plasma waves generate oscillating electric elds causing electrons to ~ E ~ B drift perpendicular to the wave's propag...

Observations of meteor-head echoes using the Jicamarca 50 MHz radar in interferometer mode

We present results of recent observations of meteor-head echoes obtained with the high-power largeaperture Jicamarca 50 MHz radar (11.95 S, 76.87 W) in an interferometric mode. The large power-aperture of the system allows us to record more than 3000 meteors per hour in the small volume subtended by the 1 antenna beam, albeit when the cluttering equatorial electrojet (EEJ) echoes are not presen...