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Cluster Observations of Mid-latitude Hiss Near the Plasmapause : Volume 22, Issue 7 (14/07/2004)

By Masson, A.

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Book Id: WPLBN0003981677
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Cluster Observations of Mid-latitude Hiss Near the Plasmapause : Volume 22, Issue 7 (14/07/2004)  
Author: Masson, A.
Volume: Vol. 22, Issue 7
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Masson, A., Inan, U. S., Laakso, H., Décréau, P., & Santolík, O. (2004). Cluster Observations of Mid-latitude Hiss Near the Plasmapause : Volume 22, Issue 7 (14/07/2004). Retrieved from

Description: RSSD of ESA, ESTEC, Noordwijk, 2201AZ, The Netherlands. In the vicinity of the plasmapause, around the geomagnetic equator, the four Cluster satellites often observe banded hiss-like electromagnetic emissions (BHE); below the electron gyrofrequency but above the lower hybrid resonance, from 2kHz to 10kHz. We show that below 4kHz, these waves propagate in the whistler mode. Using the first year of scientific operations of WHISPER, STAFF and WBD wave experiments on Cluster, we have identified the following properties of the BHE waves: (i) their location is strongly correlated with the position of the plasmapause, (ii) no MLT dependence has been found, (iii) their spectral width is generally 1 to 2kHz, and (iv) the central frequency of their emission band varies from 2kHz to 10kHz. All these features suggest that BHE are in fact mid-latitude hiss emissions (MLH). Moreover, the central frequency was found to be correlated with the Kp index. This suggests either that these banded emissions are generated in a given f/fce range, or that there is a Kp dependent Doppler shift between the satellites and a possible moving source of the MLH.

Cluster observations of mid-latitude hiss near the plasmapause


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