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- The Digital Wave Processing Experiment (DWP) on the Cluster-II spacecraft, is
a component of the Wave Experiment Consortium. The wide variety of
geophysical plasmas that will be investigated by the Cluster mission contain
waves with a frequency range from DC to over 100 kHz with both magnetic and
electric components. The characteristic duration of these waves extends from a
few milliseconds to minutes and a dynamic range of over 90 dB is desired. The
DWP instrument employs a novel architecture based on the use of transputers
with parallel processing and re-alloctable tasks to provide a high-reliability
flexible system.
DWP is responsible for coordinating WEC operations at several levels. At the
lowest level, DWP provides electrical signals to synchronise instrument
sampling. At higher levels, DWP time tags data in a consistent manner and
provides a facility for constructing more complex WEC modes by means of macros.
The processing system within the DWP instrument will also perform particle
correlations in order to permit the study of wave/particle interactions.
Particle correlation is based on forming autocorrelation functions of the time
series of particle detector counts as a function of energy and pitch angle. The
basic operations are carried out in DWP resident software using algorithms
developed for AMPTE, CRRES, rocket experiments and also from computer
simulations.
The DWP particle correlator takes raw electron detection pulses from the PEACE
instrument and performs software auto-correlation functions (ACF) that are
sorted and summed according to instantaneous PEACE selected electron energy.
DWP was designed and built by the Space Systems Group of the University of
Sheffield.
Group: Instrument_Details
Entry_ID: DWP
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Magnetic Field/Electric Field Instruments
Short_Name: DWP
Long_Name: Digital Wave Processing Experiment
End_Group
Group: Associated_Platforms
Short_Name: CLUSTER-II
End_Group
Online_Resource: http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=33024&fbodylongid=1109
Online_Resource: http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=2000-041B&ex=7
Sample_Image: http://sci.esa.int/science-e-media/img/34/hires_36660.JPG
Group: Instrument_Logistics
Instrument_Start_Date: 2000-07-16
Instrument_Owner: University of Sheffield, England
End_Group
End_Group
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