The purpose of this report is to present a preliminary analysis of the data collected in connection with NASA contract work with ESSA (ESSA contract No. E22-9-70(N)). Under this contract a study of equatorial ionospheric irregulari­ties using satellite transmissions is being performed.

The purpose of this note is to report on ionospheric observations taken at Jicamarca (lº N Magnetic Latitude) during the March 8, 1970 magnetic storm. This report includes measurements of the electron density, electron temperature and vertical drift (or E-W electric field) for the 7, 8 and 9 of March ...

Muchos procesos para su estudio óptimo por medio de computadoras requieren de diferentes sistemas de transducción. El presente trabajo describe el diseño de un sistema digital para acoplar un sistema de mul­plex y de conversión analógica/digital a una computadora, permitiendo el procesamiento si­multáneo ...

The purpose of this document is lo provide the user, the maintenance engineer, and the system programmer with the necessary information for its maintenance and use. The document provides more information than would normally be required by the average experimental user. The latter may want to limit ...

Recent radar observations near the magnetic equator show that the electron vertical drift velocity below 200 km is upward during the day and downward at night, in agreement with measurements made at higher heights. The electron vertical drifts are consistent with meridional current theories. According ...