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Ulysses SCE 10-min Radio Ranging Data C4

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.

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NumericalData

ResourceID
spase://NASA/NumericalData/Ulysses/SCE/RADIO_RANGING_C4/PT10M
ResourceHeader
ResourceName
Ulysses SCE 10-min Radio Ranging Data C4
ReleaseDate
2020-07-07 21:15:49Z
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.
Contacts
RolePersonStartDateStopDateNote
1.DataProducerspase://SMWG/Person/Michael.K.Bird
InformationURL
PriorIDs
spase://VSPO/NumericalData/Ulysses/SCE/RADIO_RANGING_C4/PT10M
spase://VSPO/NumericalData/Ulysses/SCE/RADIO_RANGING_C4/PT10M
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

Via ftp in ASCII from SPDF

AccessURL
Name
HTTPS from SPDF
URL
Description

Via http in ASCII from SPDF

Format
Text
InstrumentIDs
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1995-02-23 00:00:00
StopDate
1995-03-14 23:59:59
Cadence
PT10M
ObservedRegion
Heliosphere.Outer