Cluster II - Waves of High frequency and Sounder for Probing of Electron density by Relaxation (WHISPER)


PI of the experiment or contact person Pierrette Décréau
Institute of the PI or of the contact person (country) LPCE        (FRA)
E-mail of the PI or of the contact person pdecreau@cnrs-orleans.fr
Type of experiment The experiment consists on a sounder that can be in passive mode to measure
(via passive wave analysis) the natural wave emissions in high-frequency range,
(4-80 KHz) or in active mode (emission of short pulses of sine wave during
1 millisecond and listenning to the electric field signal transmitted to the other
antennas) to identify the plasma resonances and then the total electron density.
References about the experiment Whisper, a Resonance Sounder and Wave Analyser:
Performances and Perspectives for the Cluster Mission (E?.4)
Link(s) to Web site(s) http://lpce.cnrs-orleans.fr/gb/gb_experim/t_exper9-1-1-12.htm
http://nssdc.gsfc.nasa.gov/nmc/tmp/2000-045A&ex=11.html
Start experiment operation (dd-mm-yyyy) 01-02-2001
End experiment operation (dd-mm-yyyy) ?????
Lifetime of the experiment (month) ?????
Highest data rate 5.8 kbps
Preliminary results (R?.4)
Measured data (k, w, Bo, E(t), B(t), polarisation, Vphase, ...) The natural wave emissions (passive mode of the sounder)
and the electron density (active mode).
Data range E : 2-80 kHz     N : 0.2-80 cm-3
Sensitivity E : 2.10-9 V.m-1.Hz-1/2     N : 1 %
Time resolution E : 0.32-2.15 s     N : 1.5 s
Sampling rate E : 36000 samples per second
Data formats and supports CD-Rom and Internet
Location of the data http://sci2.estec.esa.nl/cluster/csds/ring.html
http://www.whisper.cnrs-orleans.fr/
References about the data ftp://ftp.estec.esa.nl/pub/csds/task_for/users_guide/csds_guide.html
High-resolution data (support, place, contact) Pierrette Décréau (pdecreau@cnrs-orleans.fr)