Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Honary, Farideh*
Marple, Steve R.*
Nielsen, Erling*
Romano, Vincenzo*
Spogli, Luca*
Ulich, Thomas*
Hapgood, Mike A.*
Janhunen, Pekka*
Johansson, Jonny*
Title: Mars Riometer System
Issue Date: 19-Apr-2009
Keywords: Riometer
Mars ionosphere
Abstract: A riometer (relative ionospheric opacity meter) measures the intensity of cosmic radio noise at the surface of a planet. When an electromagnetic wave passes through the ionosphere collisions between charged particles (usually electrons) and neutral gases remove energy from the wave. By measuring the received signal intensity at the planet's surface and comparing it to the expected value (the quietday curve) a riometer can deduce the absorption (attenuation) of the trans-ionospheric signal. Thus the absorption measurements provide an indication of ionisation changes occurring in the ionosphere. To avoid the need for orbiting sounders riometers use the cosmic noise background as a signal source. Earth-based systems are not subject to the challenging power, volume and mass restriction that would apply to a riometer for Mars. Some Earth-based riometers utilise phased-array antennas in order to provide an imaging capability.
Appears in Collections:Conference materials
01.02.06. Instruments and techniques

Files in This Item:

File Description SizeFormatVisibility
egu_2009_mars.pdfPoster803.25 kBAdobe PDFView/Open

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA