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Ulysses SCE 10-min Radio Ranging Data C4
var authors='Marsden, Richard G.';
document.write(authors);
(2026).
Ulysses SCE 10-min Radio Ranging Data C4.
[Data set].
Planetary Data System; Space Physics Data Facility; European Space Astronomy Centre.
https://doi.org/10.48322/whq0-wq94. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Ulysses/SCE/RADIO_RANGING_C4/PT10M
Description
This data set includes differential range delay data, and electron content samples of the intervening solar corona between Ulysses and Earth, at ten-minute intervals from the Ulysses Solar Corona Experiment (SCE) during the fourth solar conjunction (C4) of the Ulysses mission in the interval of February 23 to March 14, 1995. SCE uses a dual-frequency radio-sounding technique to exploit the dispersive nature of ionized media on the propagation of the two downlinks. The tiny Doppler shift due to plasma moving in and out of the ray path is greater at S-band than at the higher frequency X-band. Similarly, because the group velocity of waves propagating in ionized media is smaller for lower frequencies, the round-trip time of propagation for coded range signals between the spacecraft and the ground station is longer in the S-band than in the X-band.
For the C4 solar conjunction the received frequencies at S-band and X-band were recorded at time intervals of one second, and differential range delay data were recorded nominally at intervals of about five minutes. These telemetry data are archived at JPL in raw form on Archival Tracking Data Files (ATDF's) after downlink through the NASA Deep Space Network (DSN) and intermediate processing, after which the total electron content (TEC) of the intervening coronal region between Ulysses and the Earth is determined by extraction of the ranging data from the ATDF files for further processing. The ATDF files also include doppler ranging data which are not included in this data set.
All fully processed ranging data during the Ulysses C4 solar conjunction have been provided in the RANGE_C4_TAB ascii file. This file contains recorded and calculated parameters for data, time (UT - ground received), run and tracking station number, differential range delay in range units (RU), and total or columnar electron content (TEC) in units of "hexems" (10**16 e/sq-mt). Accuracy of the range measurement is of order 50 RU. Further details of the data processing are given in the SCE_DS_C4.TXT documentation file and the references therein. Details on the SCE Experiment are available in Bird, M. K., et al., "The Coronal Sounding Experiment," Astron. and Astrophys. Supp. Ser., 92(2), 425-430, 1992.
Metadata Rights
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Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/Ulysses/SCE/RADIO_RANGING_C4/PT10M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Ulysses SCE 10-min Radio Ranging Data C4
DOI
https://doi.org/10.48322/whq0-wq94
ReleaseDate
2026-07-21 12:08:34Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:49Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:32:21Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-04-10 09:59:13Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:04Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-06-11 14:42:38Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:30:40Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:08:34Z
Note
Added HelioData InformationURL. JWL
Description
This data set includes differential range delay data, and electron content samples of the intervening solar corona between Ulysses and Earth, at ten-minute intervals from the Ulysses Solar Corona Experiment (SCE) during the fourth solar conjunction (C4) of the Ulysses mission in the interval of February 23 to March 14, 1995. SCE uses a dual-frequency radio-sounding technique to exploit the dispersive nature of ionized media on the propagation of the two downlinks. The tiny Doppler shift due to plasma moving in and out of the ray path is greater at S-band than at the higher frequency X-band. Similarly, because the group velocity of waves propagating in ionized media is smaller for lower frequencies, the round-trip time of propagation for coded range signals between the spacecraft and the ground station is longer in the S-band than in the X-band.
For the C4 solar conjunction the received frequencies at S-band and X-band were recorded at time intervals of one second, and differential range delay data were recorded nominally at intervals of about five minutes. These telemetry data are archived at JPL in raw form on Archival Tracking Data Files (ATDF's) after downlink through the NASA Deep Space Network (DSN) and intermediate processing, after which the total electron content (TEC) of the intervening coronal region between Ulysses and the Earth is determined by extraction of the ranging data from the ATDF files for further processing. The ATDF files also include doppler ranging data which are not included in this data set.
All fully processed ranging data during the Ulysses C4 solar conjunction have been provided in the RANGE_C4_TAB ascii file. This file contains recorded and calculated parameters for data, time (UT - ground received), run and tracking station number, differential range delay in range units (RU), and total or columnar electron content (TEC) in units of "hexems" (10**16 e/sq-mt). Accuracy of the range measurement is of order 50 RU. Further details of the data processing are given in the SCE_DS_C4.TXT documentation file and the references therein. Details on the SCE Experiment are available in Bird, M. K., et al., "The Coronal Sounding Experiment," Astron. and Astrophys. Supp. Ser., 92(2), 425-430, 1992.
Acknowledgement
Please acknowledge the Ulysses team and the National Space Science Data Center.
PublicationInfo
Authors
Marsden, Richard G.
PublicationDate
2026-04-10 10:04:04Z
PublishedBy
Planetary Data System; Space Physics Data Facility; European Space Astronomy Centre
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Richard.G.Marsden
2.
DataProducer
spase://SMWG/Person/Michael.K.Bird
InformationURL
Name
Readme file at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ulysses/radio/sce/range/c4/sce_ds_c4.txt
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Ulysses_SCE_RADIO_RANGING_C4_PT10M
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VSPO/NumericalData/Ulysses/SCE/RADIO_RANGING_C4/PT10M
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ulysses/radio/sce/range/c4/
Description
Via ftp in ASCII from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ulysses/radio/sce/range/c4/
Description
Via http in ASCII from SPDF
Format
Text
InstrumentIDs
spase://SMWG/Instrument/Ulysses/SCE
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1995-02-23 00:00:00Z
StopDate
1995-03-14 23:59:59Z
Cadence
PT10M
ObservedRegion
Heliosphere.Outer