DocumentCode
1384442
Title
An apparatus for the detection of weak ionospheric echoes
Author
Gnanalingam, S.
Volume
101
Issue
72
fYear
1954
fDate
7/1/1954 12:00:00 AM
Firstpage
243
Lastpage
248
Abstract
An apparatus is described with which weak ionospheric echoes can be detected and their heights measured; it makes use of frequency modulation and coherent integration. With a transmitted power of 250 watts and an output bandwidth of 1 c/s the apparatus makes possible the detection of echoes corresponding to a reflection coefficient of 3×10¿5 (attenuation of 10 nepers). It is pointed out that the principle might be of use in the design of sensitive radar equipment.
Keywords
ionospheric electromagnetic wave propagation; ionospheric measuring apparatus; radio receivers; radiowave propagation;
fLanguage
English
Journal_Title
Proceedings of the IEE - Part III: Radio and Communication Engineering
Publisher
iet
Type
jour
DOI
10.1049/pi-3.1954.0060
Filename
5241622
Link To Document