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Calibrating an Ionosonde for Ionospheric Attenuation Measurements
Language
English
Obiettivo Specifico
2A. Fisica dell'alta atmosfera
2IT. Laboratori analitici e sperimentali
6IT. Osservatori non satellitari
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/18 (2018)
Electronic ISSN
1424-8220
Pages (printed)
1564
Issued date
May 15, 2018
Subjects
Abstract
Vertical ionospheric soundings have been performed at almost all ionospheric observatories with little attention to measuring the attenuation of the signal between transmission and reception. When the absorption has been determined, this has been achieved by comparing the received power after the first and second reflections, but this method has some limitations due to the unknown reflection coefficient of the ground and the non-continuous presence of the second reflection. This paper deals with a different method based on precise calibration of the sounding system, allowing determination of absolute signal attenuation after a single reflection. This approach is affected by a systematic error due to imperfect calibration of the antennas, but when the focus of interest is to measure a trend over a specified period, it is very accurate. The article describes how calibration was implemented, the measurement output formats, and finally it presents some results from a meaningful set of measurements in order to demonstrate what this method can accomplish.
Type
article
File(s)
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Name
2018-sensors-calibration.pdf
Size
6.13 MB
Format
Adobe PDF
Checksum (MD5)
67d69da4d5309b2684b2ca6ff0b53381