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Data Access
PDS/PPI
Voyager 2 Neptune Cosmic Ray Subsystem (CRS) Electron Telescope D2 Counting Rates, Version 1.0, 96 s Summary Data
var authors='Decker, Robert B.; Krimigis, Stamatios M.';
document.write(authors);
(2026).
Voyager 2 Neptune Cosmic Ray Subsystem (CRS) Electron Telescope D2 Counting Rates, Version 1.0, 96 s Summary Data.
[Data set].
Space Physics Data Facility; Planetary Data System.
https://doi.org/10.48322/4qcd-n405. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Voyager2/CRS/Neptune/PT96S
Description
* Data Set Overview
* =================
Counting Rate from the D2 Detector in the Cosmic Ray Subsystem (CRS) Electron Telescope (TET) on Voyager 2 during the Neptune Encounter. The D2 Detector nominally responds to Electrons with Kinetic Energies above approximately 2.5 MeV (see Detector Description for Details).
* Parameters
* ==========
+-----------------------------------------------------------+
| Parameter Characteristics | Value |
-------------------------------------------------------------
| Sampling Parameter Name | TIME |
| Sampling Parameter Resolution | 6.0 SECONDS |
| Minimum Sampling Parameter | N/A |
| Maximum Sampling Parameter | N/A |
| Sampling Parameter Interval | 96.0 SECONDS |
| Minimum available Sampling Interval | 96.0 SECONDS |
| Data Set Parameter Name | D2 RATE |
| Noise Level | 0.000 COUNTS/SECOND |
| Data Set Parameter Unit | COUNTS/SECOND |
+-----------------------------------------------------------+
The D2 Detector is located behind the D1 Detector in the TET, so that most of the Electrons observed by D2 have to penetrate D1 first. The D2 Rate therefore applies to Higher Energy Electrons and the Threshold Energy is less distinct than for D1, but is near 2.5 MeV. The Rate can be calculated from the Electron Differential Flux in the same way as the D1 RATE (see D1 RATE Description) with the following Calibration Table.
Table 1. D2 Response Function
+----------------------------------------------------------------+
| Energy | 11 | 23 | 41 | 61 | 80 | 90 | 100 |
------------------------------------------------------------------
| 0.989 | 0.000 | 0.000 | 0.000 | 0.001 | 0.002 | 0.001 | 0.001 |
| 1.179 | 0.000 | 0.000 | 0.000 | 0.013 | 0.023 | 0.021 | 0.018 |
| 1.372 | 0.000 | 0.000 | 0.000 | 0.037 | 0.052 | 0.051 | 0.043 |
| 1.567 | 0.000 | 0.019 | 0.028 | 0.063 | 0.082 | 0.066 | 0.061 |
| 1.763 | 0.041 | 0.034 | 0.045 | 0.090 | 0.111 | 0.098 | 0.080 |
| 1.959 | 0.106 | 0.078 | 0.072 | 0.119 | 0.142 | 0.125 | 0.097 |
| 2.157 | 0.255 | 0.186 | 0.127 | 0.152 | 0.170 | 0.146 | 0.109 |
| 2.355 | 0.488 | 0.381 | 0.228 | 0.206 | 0.212 | 0.176 | 0.126 |
| 2.553 | 0.772 | 0.627 | 0.361 | 0.272 | 0.255 | 0.202 | 0.139 |
| 2.752 | 1.019 | 0.864 | 0.501 | 0.340 | 0.299 | 0.226 | 0.152 |
| 2.951 | 1.220 | 1.053 | 0.634 | 0.400 | 0.335 | 0.250 | 0.165 |
| 3.150 | 1.461 | 1.218 | 0.746 | 0.459 | 0.375 | 0.289 | 0.188 |
| 3.350 | 1.628 | 1.378 | 0.940 | 0.515 | 0.456 | 0.411 | 0.282 |
+----------------------------------------------------------------+
* Processing
* ==========
The ENCYCLOPEDIA GENERATOR Program was run by Nand Lal at Goddard Space Flight Center to read the EDR Tape, check for Error Conditions, and reformat the Data to generate a CRS Encyclopedia Tape. The resulting Tape was sent to CalTech for subsequent Data Analysis.
The VCRUSH Program was run at CalTech to select Data of Interest from CRS Encyclopedia Tapes. In the Case of Counting Rate Data, no further Analysis was done to produce the Data in the PDS Data Sets.
Note: Neither the ENCYCLOPEDIA GENERATOR or VCRUSH Software are available for Public Use.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
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Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/Voyager2/CRS/Neptune/PT96S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Neptune Cosmic Ray Subsystem (CRS) Electron Telescope D2 Counting Rates, Version 1.0, 96 s Summary Data
DOI
https://doi.org/10.48322/4qcd-n405
ReleaseDate
2026-07-21 12:08:51Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:55Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:32:32Z
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 09:59:19Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:10Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-06-11 16:09:58Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:31:09Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:08:51Z
Note
Added HelioData InformationURL. JWL
Description
* Data Set Overview
* =================
Counting Rate from the D2 Detector in the Cosmic Ray Subsystem (CRS) Electron Telescope (TET) on Voyager 2 during the Neptune Encounter. The D2 Detector nominally responds to Electrons with Kinetic Energies above approximately 2.5 MeV (see Detector Description for Details).
* Parameters
* ==========
+-----------------------------------------------------------+
| Parameter Characteristics | Value |
-------------------------------------------------------------
| Sampling Parameter Name | TIME |
| Sampling Parameter Resolution | 6.0 SECONDS |
| Minimum Sampling Parameter | N/A |
| Maximum Sampling Parameter | N/A |
| Sampling Parameter Interval | 96.0 SECONDS |
| Minimum available Sampling Interval | 96.0 SECONDS |
| Data Set Parameter Name | D2 RATE |
| Noise Level | 0.000 COUNTS/SECOND |
| Data Set Parameter Unit | COUNTS/SECOND |
+-----------------------------------------------------------+
The D2 Detector is located behind the D1 Detector in the TET, so that most of the Electrons observed by D2 have to penetrate D1 first. The D2 Rate therefore applies to Higher Energy Electrons and the Threshold Energy is less distinct than for D1, but is near 2.5 MeV. The Rate can be calculated from the Electron Differential Flux in the same way as the D1 RATE (see D1 RATE Description) with the following Calibration Table.
Table 1. D2 Response Function
+----------------------------------------------------------------+
| Energy | 11 | 23 | 41 | 61 | 80 | 90 | 100 |
------------------------------------------------------------------
| 0.989 | 0.000 | 0.000 | 0.000 | 0.001 | 0.002 | 0.001 | 0.001 |
| 1.179 | 0.000 | 0.000 | 0.000 | 0.013 | 0.023 | 0.021 | 0.018 |
| 1.372 | 0.000 | 0.000 | 0.000 | 0.037 | 0.052 | 0.051 | 0.043 |
| 1.567 | 0.000 | 0.019 | 0.028 | 0.063 | 0.082 | 0.066 | 0.061 |
| 1.763 | 0.041 | 0.034 | 0.045 | 0.090 | 0.111 | 0.098 | 0.080 |
| 1.959 | 0.106 | 0.078 | 0.072 | 0.119 | 0.142 | 0.125 | 0.097 |
| 2.157 | 0.255 | 0.186 | 0.127 | 0.152 | 0.170 | 0.146 | 0.109 |
| 2.355 | 0.488 | 0.381 | 0.228 | 0.206 | 0.212 | 0.176 | 0.126 |
| 2.553 | 0.772 | 0.627 | 0.361 | 0.272 | 0.255 | 0.202 | 0.139 |
| 2.752 | 1.019 | 0.864 | 0.501 | 0.340 | 0.299 | 0.226 | 0.152 |
| 2.951 | 1.220 | 1.053 | 0.634 | 0.400 | 0.335 | 0.250 | 0.165 |
| 3.150 | 1.461 | 1.218 | 0.746 | 0.459 | 0.375 | 0.289 | 0.188 |
| 3.350 | 1.628 | 1.378 | 0.940 | 0.515 | 0.456 | 0.411 | 0.282 |
+----------------------------------------------------------------+
* Processing
* ==========
The ENCYCLOPEDIA GENERATOR Program was run by Nand Lal at Goddard Space Flight Center to read the EDR Tape, check for Error Conditions, and reformat the Data to generate a CRS Encyclopedia Tape. The resulting Tape was sent to CalTech for subsequent Data Analysis.
The VCRUSH Program was run at CalTech to select Data of Interest from CRS Encyclopedia Tapes. In the Case of Counting Rate Data, no further Analysis was done to produce the Data in the PDS Data Sets.
Note: Neither the ENCYCLOPEDIA GENERATOR or VCRUSH Software are available for Public Use.
PublicationInfo
Authors
Decker, Robert B.; Krimigis, Stamatios M.
PublicationDate
2026-04-10 10:04:10Z
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-N-CRS-4-SUMM-D2-96SEC-V1.0
URL
https://pds-ppi.igpp.ucla.edu/data/VG2-N-CRS-4-SUMM-D2-96SEC-V1.0/AAREADME.TXT
Description
The Document describing the Contents of the Collection.
Language
En
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Voyager2_CRS_Neptune_PT96S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VMO/NumericalData/Voyager2/CRS/Neptune/PT96S
spase://VSPO/NumericalData/Voyager2/CRS/Neptune/PT96S
AccessInformation
RepositoryID
spase://SMWG/Repository/PDS/PPI
Availability
Online
AccessRights
Open
AccessURL
Name
PDS/PPI
URL
https://pds-ppi.igpp.ucla.edu/search/view/?f=yes&id=pds://PPI/VG2-N-CRS-4-SUMM-D2-96SEC-V1.0
ProductKey
VG2-N-CRS-4-SUMM-D2-96SEC-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/CRS
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1989-08-24 22:00:00.00Z
StopDate
1989-08-25 10:00:00.00Z
Cadence
PT96S
ObservedRegion
Neptune