title: Pioneer saturn infrared radiometer: preliminary results.
abstract: The effective temperature of Saturn, 94.4 + 3 K, implies a total emission greater than two times the absorbed sunlight. The infrared data alone give an atmospheric abundance of H(2) relative to H(2) + He of 0.85 +/- 0.15. Comparison of infrared and radio occultation data will give a more precise estimate. Temperature at the 1-bar level is 137 to 140 K, and 2.5 K differences exist between belts and zones up to the 0.06-bar level. Ring temperatures range from 60 to 70 K on the south (illuminated) side and from < 60 to 67 K in the planet's shadow. The average temperature of the north (unilluminated) side is approximately 55 K. Titan's 45-micrometer brightness temperature is 80 +/- 10 K.
authors.forename: A P
authors.initials: AP
authors.lastname: Ingersoll
authors.forename: G S
authors.initials: GS
authors.lastname: Orton
authors.forename: G
authors.initials: G
authors.lastname: Münch
authors.forename: G
authors.initials: G
authors.lastname: Neugebauer
authors.forename: S C
authors.initials: SC
authors.lastname: Chase