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Voyager 1 and 2 IRIS Derived Jupiter and Saturn Observations (PDS)


Availability: Archived at NSSDC, accessible from elsewhere


This data collection contains a PDS volume holding data produced by the Voyager 1 and 2 Infrared Interferometer Spectrometer (IRIS) during the Jupiter and Saturn encounters. The measurements were obtained during north/south mapping sequences in which the planet was mapped in the latitude range between approximately 60 S and 60 N. The instrument was repeatedly scanned from north to south as Jupiter rotated under the spacecraft through approximately 360 degrees of longitude. Two maps are included, one taken as the spacecraft approached Jupiter on the day side of the planet and the other taken as the spacecraft moved away from the planet on the night side. The derived atmospheric parameters include retrieved atmospheric temperatures at the 143 mbar and 267 mbar levels, the fraction of the molecular hydrogen in the para state in a layer nominally centered near 300 mbar, cloud optical depths at 226 cm**-1 and 2050 cm**-1, and the ammonia mole fraction at 600 mbar relative to the equivalent solar value (0.000178). These are PDS data sets VG1/VG2-J-IRIS-5-NS-ATMOS-PARAMS-V1.0, VG1/VG2-J-IRIS-5-GRS-ATMOS-PARAMS-V1.0, VG1/VG2-S-IRIS-5-NS-ATMOS-PARAMS-V1.0 held on volume VG_2102. They can be accessed online at:

Alternate Names



  • Planetary Science: Atmospheres

Additional Information



Questions and comments about this data collection can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Dr. Rudolf A. HanelData ProviderNASA Goddard Space Flight Center
Dr. Lyle F. HuberGeneral ContactNew Mexico State
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