Low Frequency Ionospheric Sounding System.
Abstract
The report describes a low frequency vertical pulsed sounder which makes possible soundings of the ionospheric D-region. The system employs the most recent advancements in solid state analog components and digital arrays. It features a digital intergrating scheme which is accomplished by generation of a median value of signal from 800 pulses or a multiple thereof. By this means, more than 30 dB in available signal to noise ratio is obtained. With selectable sample spacing as small as 1.5 km, both the normal and abnormal components are separately integrated with quadrature sampling in each of 40 height intervals. Other features of the phase coherent sounder include a pseudo-random phase coding for suppression of phase coherent interference and multiple hop echoes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1971
- Accession Number
- AD0727013
Entities
People
- Klaus Bibl
- Richard Vargas-vila
Organizations
- Lowell Technological Institute