VHF-radars have been successfully used for remote sensing of the lower and middle atmosphere. The received radar-echoes are digitized and these raw data are processes in several sequential steps. By digitally filtering the raw data which is equivalent to a compression or a coherent integration, the ...

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 development of a VHF-radar in the Harz mountains (F.R.G.) for the study of the dynamics at tropospheric, stratospheric and mesospheric heights was motivated mainly by the question to what extent dynamic processes in the thermo­sphere and ionosphere are generated at lower atmospheric heights (SCUSY, ...

Se informa sobre la implementación de la transformada Rápida de Fourier para su aplicaci6n en el estimado de fun­ciones de densidad espectral de ecos ionosféricos en tiempo real. Se hace una descripción del algoritmo básico mostrándose que la eficiencia de la TRF es proporcional por lo menos a NlogrN ...

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 ...