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Data Access
PDS/PPI
Voyager 2 Jupiter Plasma Wave Spectrometer (PWS) Resampled Spectrum Analyzer, Version 1.0, 1 h Average Data
var authors='Decker, Robert B.; Krimigis, Stamatios M.';
document.write(authors);
(2026).
Voyager 2 Jupiter Plasma Wave Spectrometer (PWS) Resampled Spectrum Analyzer, Version 1.0, 1 h Average Data.
[Data set].
Space Physics Data Facility; Planetary Data System.
https://doi.org/10.48322/0hjd-0m53. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Voyager2/PWS/Jupiter/PT1H
Description
* Data Set Overview
* =================
This Data Set consists of Electric Field Spectrum Analyzer Data from the Voyager 2 Plasma Wave Subsystem obtained during the entire Mission. Data after 2013-12-31 will be added to the Archive on subsequent Volumes. The Data Set encompasses all Spectrum Analyzer Observations obtained in the Cruise Mission Phases before, between, and after the Jupiter and Saturn Encounter Phases as well as those obtained during the two Encounter Phases.
The Voyager 2 Spacecraft travels from Earth to beyond 100 AU over the Course of this Data Set. To provide some Guidance on when some Key Events occurred during the Mission, the following Table is provided.
+----------------------------------------------------------------+
| Date | Event |
------------------------------------------------------------------
| 1977-08-20 | Launch |
| 1979-07-02 | First inbound Bow Shock Crossing at Jupiter |
| 1979-08-03 | Last outbound Bow Shock Crossing at Jupiter |
| 1981-08-24 | First inbound Bow Shock Crossing at Saturn |
| 1981-08-31 | Last outbound Bow Shock Crossing at Saturn |
| 1982-04-26 | 10 AU |
| 1983-08-30 | Onset of first major LF Heliospheric Radio Event |
| 1986-01-24 | First inbound Bow Shock Crossing at Uranus |
| 1986-01-29 | Last outbound Bow Shock Crossing at Uranus |
| 1986-05-26 | 20 AU |
| 1989-08-07 | 30 AU |
| 1989-08-24 | First inbound Bow Shock Crossing at Neptune |
| 1989-08-28 | Last outbound Bow Shock Crossing at Neptune |
| 1992-07-06 | Onset of second major LF Heliospheric Radio Event |
| 1993-05-08 | 40 AU |
| 1996-10-10 | 50 AU |
| 2000-01-27 | 60 AU |
| 2002-11-01 | Onset of third major LF Heliospheric Radio Event |
| 2003-04-21 | 70 AU |
| 2006-07-01 | 80 AU |
| 2009-09-03 | 90 AU |
| 2012-11-04 | 100 AU |
+----------------------------------------------------------------+
* Data Sampling
* =============
This Data Set consists of average and peak Wave Electric Field Intensities accumulated over one hour Intervals from the Voyager 2 Plasma Wave Receiver Spectrum Analyzer obtained during the entire Mission. For each one hour Time Interval Squares of the calibrated Electric Field Measurements obtained during each hour-long Interval in each of the sixteen Spectrum Analyzer Channels are summed and then divided by the Number of Measurements. The Square Root of the resulting Value is obtained and stored as the average Electric Field Strength for the respective Channel. During the same hour-long Interval, the maximum Electric Field Strength acquired in each of the sixteen Channels is also recorded and stored as the peak Electric Field Strength for the respective Channel. Hence, for each hour, an average and peak Electric Field Spectrum from 10 Hz to 56.2 kHz is obtained. The sixteen Spectrum Analyzer Channels have Center Frequencies that range from 10 Hz to 56.2 kHz and are logarithmically spaced in Frequency, four Channels per Decade. The Time associated with each peak and average Spectrum is the Time of the Beginning of the Averaging Interval. Given Variations in the Sweep Rate of the Instrument (from a minimum of 4 s per sweep to a maximum of 96 s per sweep) the maximum Number of Samples in an hour-long Interval can range from 900 to 38. Data Gaps within the Interval can further reduce the Number of Samples.
During Data Gaps where complete Spectra are missing, no Entries exist in the File, that is, the Gaps are not Zero-filled or Tagged in any other way.
* Data Processing
* ===============
The Spectrum Analyzer Data are a continuous (where Data are available) low resolution Data Set which provides Wave Intensity as a Function of Frequency (sixteen log-spaced Channels) and Time (one Spectrum per Time Intervals ranging from 4 s to 96 s in the full-resolution Data Set, depending on Telemetry Mode.) This Data Set includes 1 hr average and peak Values for each Channel. The Data are typically plotted as Amplitude versus Time for one or more of the Channels in a Strip-Chart like Display, or can be displayed as a Frequency-Time Spectrogram using a Grayscale Bar or a Color Bar to indicate Amplitude. With only sixteen Channels, it is usually best to stretch the Frequency Axis by interpolating from one Frequency Channel to the next either linearly or with a Spline Fit. One must be aware if the Frequency Axis is stretched that more Resolution may be implied than is really present.
The Measurements provided in the average and peak Electric Field Spectra included in this Data Set are in Units of Electric Field (V/m).
Spectral Density Units may be obtained by dividing the Square of the Electric Field Value by the nominal Frequency Bandwidth of the corresponding Spectrum Analyzer Channel.
* specdens=(efield(ichan))^2/bandwidth(ichan)
Finally, Power Flux may be obtained by dividing the Spectral Density by the Impedance of Free Space in Ohms:
* pwrflux=(efield(ichan))^2/bandwidth(ichan)/376.73
The Center Frequencies and Bandwidths of each PWS Spectrum Analyzer Channel for the Voyager 2 PWS are given below:
+----------------------------------------+
| Channel | Center Frequency | Bandwidth |
------------------------------------------
| 1 | 10.0 Hz | 2.16 Hz |
| 2 | 17.8 Hz | 3.58 Hz |
| 3 | 31.1 Hz | 4.50 Hz |
| 4 | 56.2 Hz | 10.7 Hz |
| 5 | 100 Hz | 13.8 Hz |
| 6 | 178 Hz | 28.8 Hz |
| 7 | 311 Hz | 39.8 Hz |
| 8 | 562 Hz | 75.9 Hz |
| 9 | 1.00 kHz | 75.9 Hz |
| 10 | 1.78 kHz | 151 Hz |
| 11 | 3.11 kHz | 324 Hz |
| 12 | 5.62 kHz | 513 Hz |
| 13 | 10.0 kHz | 832 Hz |
| 14 | 17.8 kHz | 1260 Hz |
| 15 | 31.1 kHz | 2400 Hz |
| 16 | 56.2 kHz | 3800 Hz |
+----------------------------------------+
A Failure in the Voyager 2 Flight Data System which occurred about three Months after Launch has adversely affected the Calibration of PWS Channels 9 through 16. An Algorithm has been devised to partially correct for this Failure, and has proven useful for Voyager 2 Jupiter, Saturn, Uranus, and Neptune Encounters, but is not valid for Earth-Jupiter Cruise and may be modified in the Future. The following Implementation of this Correction Algorithm in FORTRAN assumes that uncalibrated Data Numbers are stored in a sixteen-element Integer Array, idn, with the Array Index equal to the PWS Channel Number:
* c 'the old Noise level.' for VG2 PWS
*
* real tonl(9:16) /2.0,1.0,-1.0,-2.0,-3.0,1.0,2.0,1.0/
*
* do ichan=9,16
* if(idn(ichan).gt.0) then
* if(idn(ichan).lt.64) idn(ichan)=64
* if(idn(ichan).le.72) then
* idn(ichan)=int(tonl(ichan)-530.4+8.6*float(idn(ichan)))
* else
* idn(ichan)=int(tonl(ichan)+20.113+0.99*float(idn(ichan)))
* end if
* end if
* end do
This Correction has been applied to the appropriate Data in this Data Set.
Additional Information about this Data Set and the Instrument which produced it can be found elsewhere in this Catalog. A complete Instrument Description can be found in (Scarf and Gurnett, 1977).
* Data
* ====
The average and peak Spectrum Analyzer Data are a continuous (where Data are available) low resolution Data Set which provides Wave Intensity as a Function of Frequency (sixteen log-spaced Channels) and Time (one Spectrum per hour). Each Sample is a floating point Electric Field Strength in Units of V/m.
* Ancillary Data
* ==============
None
* Coordinates
* ===========
The Electric Dipole Antenna detects Electric Fields
Metadata Rights
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NumericalData
ResourceID
spase://NASA/NumericalData/Voyager2/PWS/Jupiter/PT1H
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Jupiter Plasma Wave Spectrometer (PWS) Resampled Spectrum Analyzer, Version 1.0, 1 h Average Data
DOI
https://doi.org/10.48322/0hjd-0m53
ReleaseDate
2026-06-26 13:31:34Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:16:00Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:32:42Z
Note
Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
RevisionEvent
ReleaseDate
2026-04-10 09:59:27Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:17Z
Note
Added PublicationInfo. ZCB
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ReleaseDate
2026-06-12 19:17:32Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:31:34Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
Description
* Data Set Overview
* =================
This Data Set consists of Electric Field Spectrum Analyzer Data from the Voyager 2 Plasma Wave Subsystem obtained during the entire Mission. Data after 2013-12-31 will be added to the Archive on subsequent Volumes. The Data Set encompasses all Spectrum Analyzer Observations obtained in the Cruise Mission Phases before, between, and after the Jupiter and Saturn Encounter Phases as well as those obtained during the two Encounter Phases.
The Voyager 2 Spacecraft travels from Earth to beyond 100 AU over the Course of this Data Set. To provide some Guidance on when some Key Events occurred during the Mission, the following Table is provided.
+----------------------------------------------------------------+
| Date | Event |
------------------------------------------------------------------
| 1977-08-20 | Launch |
| 1979-07-02 | First inbound Bow Shock Crossing at Jupiter |
| 1979-08-03 | Last outbound Bow Shock Crossing at Jupiter |
| 1981-08-24 | First inbound Bow Shock Crossing at Saturn |
| 1981-08-31 | Last outbound Bow Shock Crossing at Saturn |
| 1982-04-26 | 10 AU |
| 1983-08-30 | Onset of first major LF Heliospheric Radio Event |
| 1986-01-24 | First inbound Bow Shock Crossing at Uranus |
| 1986-01-29 | Last outbound Bow Shock Crossing at Uranus |
| 1986-05-26 | 20 AU |
| 1989-08-07 | 30 AU |
| 1989-08-24 | First inbound Bow Shock Crossing at Neptune |
| 1989-08-28 | Last outbound Bow Shock Crossing at Neptune |
| 1992-07-06 | Onset of second major LF Heliospheric Radio Event |
| 1993-05-08 | 40 AU |
| 1996-10-10 | 50 AU |
| 2000-01-27 | 60 AU |
| 2002-11-01 | Onset of third major LF Heliospheric Radio Event |
| 2003-04-21 | 70 AU |
| 2006-07-01 | 80 AU |
| 2009-09-03 | 90 AU |
| 2012-11-04 | 100 AU |
+----------------------------------------------------------------+
* Data Sampling
* =============
This Data Set consists of average and peak Wave Electric Field Intensities accumulated over one hour Intervals from the Voyager 2 Plasma Wave Receiver Spectrum Analyzer obtained during the entire Mission. For each one hour Time Interval Squares of the calibrated Electric Field Measurements obtained during each hour-long Interval in each of the sixteen Spectrum Analyzer Channels are summed and then divided by the Number of Measurements. The Square Root of the resulting Value is obtained and stored as the average Electric Field Strength for the respective Channel. During the same hour-long Interval, the maximum Electric Field Strength acquired in each of the sixteen Channels is also recorded and stored as the peak Electric Field Strength for the respective Channel. Hence, for each hour, an average and peak Electric Field Spectrum from 10 Hz to 56.2 kHz is obtained. The sixteen Spectrum Analyzer Channels have Center Frequencies that range from 10 Hz to 56.2 kHz and are logarithmically spaced in Frequency, four Channels per Decade. The Time associated with each peak and average Spectrum is the Time of the Beginning of the Averaging Interval. Given Variations in the Sweep Rate of the Instrument (from a minimum of 4 s per sweep to a maximum of 96 s per sweep) the maximum Number of Samples in an hour-long Interval can range from 900 to 38. Data Gaps within the Interval can further reduce the Number of Samples.
During Data Gaps where complete Spectra are missing, no Entries exist in the File, that is, the Gaps are not Zero-filled or Tagged in any other way.
* Data Processing
* ===============
The Spectrum Analyzer Data are a continuous (where Data are available) low resolution Data Set which provides Wave Intensity as a Function of Frequency (sixteen log-spaced Channels) and Time (one Spectrum per Time Intervals ranging from 4 s to 96 s in the full-resolution Data Set, depending on Telemetry Mode.) This Data Set includes 1 hr average and peak Values for each Channel. The Data are typically plotted as Amplitude versus Time for one or more of the Channels in a Strip-Chart like Display, or can be displayed as a Frequency-Time Spectrogram using a Grayscale Bar or a Color Bar to indicate Amplitude. With only sixteen Channels, it is usually best to stretch the Frequency Axis by interpolating from one Frequency Channel to the next either linearly or with a Spline Fit. One must be aware if the Frequency Axis is stretched that more Resolution may be implied than is really present.
The Measurements provided in the average and peak Electric Field Spectra included in this Data Set are in Units of Electric Field (V/m).
Spectral Density Units may be obtained by dividing the Square of the Electric Field Value by the nominal Frequency Bandwidth of the corresponding Spectrum Analyzer Channel.
* specdens=(efield(ichan))^2/bandwidth(ichan)
Finally, Power Flux may be obtained by dividing the Spectral Density by the Impedance of Free Space in Ohms:
* pwrflux=(efield(ichan))^2/bandwidth(ichan)/376.73
The Center Frequencies and Bandwidths of each PWS Spectrum Analyzer Channel for the Voyager 2 PWS are given below:
+----------------------------------------+
| Channel | Center Frequency | Bandwidth |
------------------------------------------
| 1 | 10.0 Hz | 2.16 Hz |
| 2 | 17.8 Hz | 3.58 Hz |
| 3 | 31.1 Hz | 4.50 Hz |
| 4 | 56.2 Hz | 10.7 Hz |
| 5 | 100 Hz | 13.8 Hz |
| 6 | 178 Hz | 28.8 Hz |
| 7 | 311 Hz | 39.8 Hz |
| 8 | 562 Hz | 75.9 Hz |
| 9 | 1.00 kHz | 75.9 Hz |
| 10 | 1.78 kHz | 151 Hz |
| 11 | 3.11 kHz | 324 Hz |
| 12 | 5.62 kHz | 513 Hz |
| 13 | 10.0 kHz | 832 Hz |
| 14 | 17.8 kHz | 1260 Hz |
| 15 | 31.1 kHz | 2400 Hz |
| 16 | 56.2 kHz | 3800 Hz |
+----------------------------------------+
A Failure in the Voyager 2 Flight Data System which occurred about three Months after Launch has adversely affected the Calibration of PWS Channels 9 through 16. An Algorithm has been devised to partially correct for this Failure, and has proven useful for Voyager 2 Jupiter, Saturn, Uranus, and Neptune Encounters, but is not valid for Earth-Jupiter Cruise and may be modified in the Future. The following Implementation of this Correction Algorithm in FORTRAN assumes that uncalibrated Data Numbers are stored in a sixteen-element Integer Array, idn, with the Array Index equal to the PWS Channel Number:
* c 'the old Noise level.' for VG2 PWS
*
* real tonl(9:16) /2.0,1.0,-1.0,-2.0,-3.0,1.0,2.0,1.0/
*
* do ichan=9,16
* if(idn(ichan).gt.0) then
* if(idn(ichan).lt.64) idn(ichan)=64
* if(idn(ichan).le.72) then
* idn(ichan)=int(tonl(ichan)-530.4+8.6*float(idn(ichan)))
* else
* idn(ichan)=int(tonl(ichan)+20.113+0.99*float(idn(ichan)))
* end if
* end if
* end do
This Correction has been applied to the appropriate Data in this Data Set.
Additional Information about this Data Set and the Instrument which produced it can be found elsewhere in this Catalog. A complete Instrument Description can be found in (Scarf and Gurnett, 1977).
* Data
* ====
The average and peak Spectrum Analyzer Data are a continuous (where Data are available) low resolution Data Set which provides Wave Intensity as a Function of Frequency (sixteen log-spaced Channels) and Time (one Spectrum per hour). Each Sample is a floating point Electric Field Strength in Units of V/m.
* Ancillary Data
* ==============
None
* Coordinates
* ===========
The Electric Dipole Antenna detects Electric Fields
PublicationInfo
Authors
Decker, Robert B.; Krimigis, Stamatios M.
PublicationDate
2026-04-10 10:04:17Z
PublishedBy
Space Physics Data Facility; Planetary Data System
Contacts
Role
Person
StartDate
StopDate
Note
1.
CoPI
spase://SMWG/Person/Robert.B.Decker
2.
PrincipalInvestigator
spase://SMWG/Person/Stamatios.M.Krimigis
3.
MetadataContact
spase://SMWG/Person/Todd.A.King
4.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
VG2-J/S/U/N/SS-PWS-4-SUMM-SA1HOUR-V1.0
URL
https://pds-ppi.igpp.ucla.edu/data/VG2-J_S_U_N_SS-PWS-4-SUMM-SA1HOUR-V1.0/AAREADME.TXT
Description
The Document describing the Contents of the Collection.
Language
En
PriorIDs
spase://VMO/NumericalData/Voyager2/PWS/Jupiter/PT1H
spase://VSPO/NumericalData/Voyager2/PWS/Jupiter/PT1H
AccessInformation
RepositoryID
spase://SMWG/Repository/PDS/PPI
Availability
Online
AccessRights
Open
AccessURL
Name
PDS/PPI
URL
https://pds-ppi.igpp.ucla.edu/search/view/?id=pds://PPI/VG2-J_S_U_N_SS-PWS-4-SUMM-SA1HOUR-V1.0
ProductKey
VG2-J/S/U/N/SS-PWS-4-SUMM-SA1HOUR-V1.0
Description
This Collection is archived with NASA Planetary Data System.
Language
En
Format
Text.ASCII
Acknowledgement
NASA Planetary Plasma Interactions (PPI) Node of the Planetary Data System (PDS) and the Principal Investigator for the Data.
InstrumentIDs
spase://SMWG/Instrument/Voyager2/PWS
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
1977-08-20 07:00:00.00Z
StopDate
2014-01-01 00:00:00.00Z
Cadence
PT1H
ObservedRegion
Jupiter