Version:2.3.0
NumericalData
ResourceID
spase://ESA/NumericalData/Cluster-Salsa/WHISPER/PT2S
ResourceHeader
ResourceName
Cluster-Salsa Waves of HF and Sounder for Probing Electron Density by Relaxation (WHISPER) Natural Electric Power Spectral Density
AlternateName
Cluster Salsa WHISPER Electric Power Spectral Density under Natural Mode
AlternateName
C2_CP_WHI_NATURAL
ReleaseDate
2018-06-28 22:02:01Z
Description
The Waves of HIgh frequency and Sounder for Probing of Electron density by Relaxation (WHISPER) performs the measurement of the electron density on the four satellites of the Cluster project. The two main purposes of the WHISPER experiment are to record the natural waves and to make a diagnostic of the electron density using the sounding technique. The various working modes and the fourier transforms calculated on board provide a good frequency resolution obtained in the bandwidth 2-83 kHz. Onboard data compression by the Digital Wave Processing (DWP) intrument allows a good dynamic and level resolution of the electric signal amplitude. Data products available from the Cluster Science Archive include: electric spectral power density (natural spectra and active spectra), electric spectral power density from passive emission during sounding, and electric waveform power density in 0.2 second resolution. Ancillary data include Quicklook plots (JPEG) in both active and natural mode, sounding times, housekeeping data, instrument parameters during natural and active mode, and active to passive spectral power density coded ratio. Access to data through the Cluster Science Archive is available via a java GUI interface and a command-line interface. Registration is required.
Acknowledgement
Users of the Cluster WHISPER data are encouraged to acknowledge the instrument team and ESA Cluster Science Archive when using this data
Contacts
InformationURL
Name
Cluster Science Archive Documentation Page
URL
Language
en
PriorIDs
spase://VWO/NumericalData/Cluster-Salsa/WHISPER/PT2S
spase://VSPO/NumericalData/Cluster-Salsa/WHISPER/PT2S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
Access to Cluster WHISPER CEFs and CDFs
URL
ProductKey
C2_CP_WHI_NATURAL
Description
Access to repository of Cluster 2 WHISPER data in Cluster Exchange Format (CEF) and CDF at the Cluster Science Archive. Access is open but registration is required.
Language
en
Format
Text.ASCII
Encoding
None
Acknowledgement
Users of the Cluster WHISPER data are encouraged to acknowledge the instrument team and ESA Cluster Science Archive when using this data
ProcessingLevel
Calibrated
ProviderResourceName
Electric Spectral Power Density (natural spectra)
InstrumentIDs
MeasurementType
Waves.Passive
MeasurementType
ElectricField
TemporalDescription
TimeSpan
StartDate
2000-08-16 12:39:00Z
RelativeStopDate
-P7D
Cadence
PT2.14S
SpectralRange
RadioFrequency
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface.PolarCap
ObservedRegion
Heliosphere.Inner
Keywords
Dynamic Spectrogram
AKR
Auroral hiss
Auroral Kilometric Radiation
Chorus
Continuum radiation
Equatorial Noise
Kilometric Continuum radiation
Plasmaspheric Hiss
Terrestrial Kilometric Radiation
TKR
Very Long Baseline Interferometry
VLBI
Langmuir Waves
Type III Solar Bursts
Electostatic Solitary Waves
ESW
Whistlers
Ion Acoustic Waves
Bernstein Waves
Upper Hybrid Waves
Lower Hybrid Waves
Parameter #1
Name
Universal Time
ParameterKey
time_tags__C2_CP_WHI_NATURAL
Description
Interval centred time tag
Units
s
Support
Parameter #2
Name
Delta
ParameterKey
Delta__C2_CP_WHI_NATURAL
Description
Delta. Half of the number of seconds corresponding to the sampling interval + the uncertainty of the time tags
Units
s
Support
Parameter #3
Name
Fast Fourier Transform Size
ParameterKey
fft_size__C2_CP_WHI_NATURAL
Description
Number of bin frequency points of the Fast Fourier Transform
Support
Parameter #4
Name
Receiving antenna
ParameterKey
Receiving_Antenna__C2_CP_WHI_NATURAL
Description
Receiving antenna Ey or Ez
Support
Parameter #5
Name
Electric Spectral Power Density
ParameterKey
Electric_Spectral_Power_Density__C2_CP_WHI_NATURAL
Description
Electric Spectral Power Density in Natural Mode
Units
Vrms^2*m^-2*Hz^-1
Wave
WaveType
PlasmaWaves
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
2
High
80
Units
kHz
Parameter #6
Name
Spectral Frequencies
ParameterKey
Spectral_Frequencies__C2_CP_WHI_NATURAL
Description
Spectral Frequencies between 1.953 and 79.915 kHz, that is to say the frequencies corresponding point to point to the 512 elements of the fixed size spectrum
Units
kHz
Support
Parameter #7
Name
Overflow Code Value
ParameterKey
Overflow_Code__C2_CP_WHI_NATURAL
Description
This variable coded between 0 (no problem) to 1 (saturation) gives us an idea of the overflow value of the acquisition
Support
Parameter #8
Name
Average Number
ParameterKey
Average_Number__C2_CP_WHI_NATURAL
Description
Number of averaged spectra
Support
Parameter #9
Name
Gain Change Number
ParameterKey
Gain_Change_Number__C2_CP_WHI_NATURAL
Description
Number of gain changes during the acquisition
Support
Parameter #10
Name
Mantissa
ParameterKey
Mantissa__C2_CP_WHI_NATURAL
Description
First part of the compressed value which is a fixed point integer defined in the compression algorithm
Support
Parameter #11
Name
Exponent
ParameterKey
Exponent__C2_CP_WHI_NATURAL
Description
Second part of the compressed value
Support
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