TY - GEN
T1 - The WHISPER relaxation sounder and the CLUSTER active archive
AU - Trotignon, J. G.
AU - Décréau, P. M.E.
AU - Rauch, J. L.
AU - Vallières, X.
AU - Rochel, A.
AU - Kougblénou, S.
AU - Lointier, G.
AU - Facskó, G.
AU - Canu, P.
AU - Darrouzet, F.
AU - Masson, A.
N1 - Publisher Copyright:
© Springer Science+Business Media B.V. 2010.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - The Waves of HIgh frequency and Sounder for Probing of Electron density by Relaxation (WHISPER) instrument is part of the Wave Experiment Consortium (WEC) of the CLUSTER mission. With the help of the long double sphere antennae of the Electric Field and Wave (EFW) instrument and the Digital Wave Processor (DWP), it delivers active (sounding) and natural (transmitter off) electric field spectra, respectively from 4 to 82 kHz, and from 2 to 80 kHz. These frequency ranges have been chosen to include the electron plasma frequency, which is closely related to the total electron density, in most of the regions encountered by the CLUSTER spacecraft. Presented here is an overview of the WHISPER data products available in the CLUSTER Active Archive (CAA). The instrument and its performance are first recalled. The way the WHISPER products are obtained is then described, with particular attention being paid to the density determination. Both sounding and natural measurements are commonly used in this process, which depends on the ambient plasma regime. This is illustrated using drawings similar to the Bryant plots commonly used in the CLUSTER master science plan. These give a clear overview of typical density values and the parts of the orbits where they are obtained. More information on the applied software or on the quality/reliability of the density determination can also be highlighted.
AB - The Waves of HIgh frequency and Sounder for Probing of Electron density by Relaxation (WHISPER) instrument is part of the Wave Experiment Consortium (WEC) of the CLUSTER mission. With the help of the long double sphere antennae of the Electric Field and Wave (EFW) instrument and the Digital Wave Processor (DWP), it delivers active (sounding) and natural (transmitter off) electric field spectra, respectively from 4 to 82 kHz, and from 2 to 80 kHz. These frequency ranges have been chosen to include the electron plasma frequency, which is closely related to the total electron density, in most of the regions encountered by the CLUSTER spacecraft. Presented here is an overview of the WHISPER data products available in the CLUSTER Active Archive (CAA). The instrument and its performance are first recalled. The way the WHISPER products are obtained is then described, with particular attention being paid to the density determination. Both sounding and natural measurements are commonly used in this process, which depends on the ambient plasma regime. This is illustrated using drawings similar to the Bryant plots commonly used in the CLUSTER master science plan. These give a clear overview of typical density values and the parts of the orbits where they are obtained. More information on the applied software or on the quality/reliability of the density determination can also be highlighted.
UR - https://www.scopus.com/pages/publications/84890472300
U2 - 10.1007/978-90-481-3499-1_12
DO - 10.1007/978-90-481-3499-1_12
M3 - Conference contribution
AN - SCOPUS:84890472300
SN - 9780387727677
SN - 9780387876207
SN - 9781402055720
SN - 9781402069321
SN - 9781402088674
SN - 9781402091896
SN - 9781441981608
SN - 9781441983688
SN - 9783540758259
SN - 9783642033230
SN - 9783642103216
SN - 9783642103513
SN - 9783642113406
SN - 9783642172502
SN - 9789048133994
SN - 9789048134984
SN - 9789048134984
T3 - Astrophysics and Space Science Proceedings
SP - 185
EP - 206
BT - Astrophysics and Space Science Proceedings
A2 - Laakso, Harri
A2 - Taylor, Matthew
A2 - Escoubet, C. Philippe
PB - Springer Science and Business Media B.V.
T2 - 15th Workshop on Cluster Active Archive, 2008
Y2 - 9 March 2008 through 15 March 2008
ER -