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Data Access
PDS/PPI
Voyager 2 Neptune Planetary Radio Astronomy (PRA) Low-Frequency Receiver Band, Version 1.0, 60 ms High Rate Data
var authors='Decker, Robert B.; Krimigis, Stamatios M.';
document.write(authors);
(2026).
Voyager 2 Neptune Planetary Radio Astronomy (PRA) Low-Frequency Receiver Band, Version 1.0, 60 ms High Rate Data.
[Data set].
Space Physics Data Facility; Planetary Data System.
https://doi.org/10.48322/yqkw-2w55. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Voyager2/PRA/Neptune/PT0.6S
Description
* Data Set Overview
* =================
This Data Set (VG2-N-PRA-2-RDR-HIGHRATE-60MS-V1.0) contains Data acquired by the Voyager 2 Planetary Radio Astronomy (PRA) Instrument during the Neptune Encounter. Since the PRA Instrument is able to observe Planetary Phenomenon at much larger Ranges than other Fields and Particles Experiments, thus the PRA Data cover a variable and longer Encounter Period. PRA Low Band Data provided here cover the entire Neptune Encounter Phase (1989-05-25 to 1989-09-27).
Each File within the Data Set represents a single PRA High Rate Frame, of Duration 48 s. Each File contains a 28 Octet Header, followed by 1280000 Octets of Data.
The Header Format is described as below:
+----------------------------------------------------------------+
| Length (bytes) | Name | Contents |
------------------------------------------------------------------
| 2 | Year | Year A.D. |
| 2 | Day | Day of Year, 1 denotes 1 Jan |
| 1 | Hour | Hour of Day |
| 1 | Minute | Minute of Hour |
| 1 | Second | Second of Minute |
| 1 | Spacecraft | 1 denotes V1, 2 denotes V2 |
| 2 | Integral FDS | Integer Part of FDS Count |
| 1 | Fractional FDS | Fractional Part of FDS Count |
| 4 | Frequency 1 | Frequency of 1st Channel, Hz |
| 4 | Frequency 2 | Frequency of 2nd Channel, Hz |
| 4 | Frequency 3 | Frequency of 3rd Channel, Hz |
| 4 | Frequency 4 | Frequency of 4th Channel, Hz |
| 1 | Bandwidth | Bandwidth, kHz |
+----------------------------------------------------------------+
where all Values are unsigned, and multi-octet Values are presented with the most significant Byte first.
The Data are 16 bit Numbers, most significant byte first, with 0 indicating unavailable Data. The Data are presented as a single Stream of 16 bit Numbers. The Frame is logically divided into Lines (although there is no Indication of the Lines within the File). This Terminology comes from the Fact that in this High Rate Mode, the PRA Data are treated exactly as if they were Imaging Data, and a 48 s Image comprises 800 horizontal Scan Lines. Similarly, there are 800 Logical Lines within a PRA Frame. Each Line comprises 800 Values, representing 400 Data Pairs. In the High Rate Mode, the PRA measures the Flux at two Frequencies simultaneously and returns these two Data sequentially. A sample Pair is acquired every (actually every 138.88 µs), through an RC Filter with a 100 µs Time Constant. A single Line comprises 60 µs of Data. Lines are not contiguous in Time. There is a 4444.44 µs Gap between the ending of one Line and the Start of the succeeding Line.
The PRA samples a Frequency Pair in this Manner for 24 s. It then has the Option of switching to a second Pair for the final 24 s. These Frequencies are designated Frequency 1 through Frequency 4 in the Header. The Data are presented such that the higher of the relevant Frequency Pair is presented first.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
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Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/Voyager2/PRA/Neptune/PT0.6S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Neptune Planetary Radio Astronomy (PRA) Low-Frequency Receiver Band, Version 1.0, 60 ms High Rate Data
DOI
https://doi.org/10.48322/yqkw-2w55
ReleaseDate
2026-07-21 12:09:04Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:16:00Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:32:41Z
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 09:59:26Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:16Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-06-12 19:17:29Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:31:32Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:09:04Z
Note
Added HelioData InformationURL. JWL
Description
* Data Set Overview
* =================
This Data Set (VG2-N-PRA-2-RDR-HIGHRATE-60MS-V1.0) contains Data acquired by the Voyager 2 Planetary Radio Astronomy (PRA) Instrument during the Neptune Encounter. Since the PRA Instrument is able to observe Planetary Phenomenon at much larger Ranges than other Fields and Particles Experiments, thus the PRA Data cover a variable and longer Encounter Period. PRA Low Band Data provided here cover the entire Neptune Encounter Phase (1989-05-25 to 1989-09-27).
Each File within the Data Set represents a single PRA High Rate Frame, of Duration 48 s. Each File contains a 28 Octet Header, followed by 1280000 Octets of Data.
The Header Format is described as below:
+----------------------------------------------------------------+
| Length (bytes) | Name | Contents |
------------------------------------------------------------------
| 2 | Year | Year A.D. |
| 2 | Day | Day of Year, 1 denotes 1 Jan |
| 1 | Hour | Hour of Day |
| 1 | Minute | Minute of Hour |
| 1 | Second | Second of Minute |
| 1 | Spacecraft | 1 denotes V1, 2 denotes V2 |
| 2 | Integral FDS | Integer Part of FDS Count |
| 1 | Fractional FDS | Fractional Part of FDS Count |
| 4 | Frequency 1 | Frequency of 1st Channel, Hz |
| 4 | Frequency 2 | Frequency of 2nd Channel, Hz |
| 4 | Frequency 3 | Frequency of 3rd Channel, Hz |
| 4 | Frequency 4 | Frequency of 4th Channel, Hz |
| 1 | Bandwidth | Bandwidth, kHz |
+----------------------------------------------------------------+
where all Values are unsigned, and multi-octet Values are presented with the most significant Byte first.
The Data are 16 bit Numbers, most significant byte first, with 0 indicating unavailable Data. The Data are presented as a single Stream of 16 bit Numbers. The Frame is logically divided into Lines (although there is no Indication of the Lines within the File). This Terminology comes from the Fact that in this High Rate Mode, the PRA Data are treated exactly as if they were Imaging Data, and a 48 s Image comprises 800 horizontal Scan Lines. Similarly, there are 800 Logical Lines within a PRA Frame. Each Line comprises 800 Values, representing 400 Data Pairs. In the High Rate Mode, the PRA measures the Flux at two Frequencies simultaneously and returns these two Data sequentially. A sample Pair is acquired every (actually every 138.88 µs), through an RC Filter with a 100 µs Time Constant. A single Line comprises 60 µs of Data. Lines are not contiguous in Time. There is a 4444.44 µs Gap between the ending of one Line and the Start of the succeeding Line.
The PRA samples a Frequency Pair in this Manner for 24 s. It then has the Option of switching to a second Pair for the final 24 s. These Frequencies are designated Frequency 1 through Frequency 4 in the Header. The Data are presented such that the higher of the relevant Frequency Pair is presented first.
PublicationInfo
Authors
Decker, Robert B.; Krimigis, Stamatios M.
PublicationDate
2026-04-10 10:04:16Z
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-PRA-2-RDR-HIGHRATE-60MS-V1.0
URL
https://pds-ppi.igpp.ucla.edu/data/VG2-N-PRA-2-RDR-HIGHRATE-60MS-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_PRA_Neptune_PT0.6S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VMO/NumericalData/Voyager2/PRA/Neptune/PT0.60S
spase://VSPO/NumericalData/Voyager2/PRA/Neptune/PT0.6S
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-PRA-2-RDR-HIGHRATE-60MS-V1.0
ProductKey
VG2-N-PRA-2-RDR-HIGHRATE-60MS-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/PRA
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
1989-05-25 06:58:32.00Z
StopDate
1989-09-27 17:52:43.00Z
Cadence
PT0.6S
ObservedRegion
Neptune