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Net-flux Radiometer (NFR)

NSSDC ID: 1989-084E-04
Mission Name: Galileo Probe
Principal Investigator: Dr. Lawrence A. Sromovsky


The purposes of this investigation are (1) to measure vertical distribution of net flux of solar energy and planetary emission in the region of the atmosphere from 0.1 to 10 bars, (2) to determine the location of cloud layers, and (3) to obtain evidence on the mixing ratios of selected constituents and the opacity of clouds and aerosols in the infrared. A multichannel radiometer measures flux in about 30-deg cones alternately centered plus or minus 45 deg from the Probe horizontal. The radiometer has an onboard calibration system (two black bodies), a multidetector array (with channels at approximately 0.3 - 3.0, 0.3 - 2000, 20 - 30, 30 - 40, and 40 - 60 micrometers), and an array of six pyroelectric detectors. The radiometer is mounted on the Probe with external viewing after shield deployment. The total mass is 2.3 kg and the total power is 4.6 W.

Alternate Names

  • NFR

Facts in Brief

Mass: 3.134 kg


  • Planetary Science: Atmospheres

Additional Information

Questions or comments about this experiment can be directed to: Dr. Edwin V. Bell, II.



NameRoleOriginal AffiliationE-mail
Dr. Henry E. RevercombCo-InvestigatorUniversity of Wisconsin-Madison 
Dr. James B. PollackCo-InvestigatorNASA Ames Research Center 
Dr. Martin G. TomaskoCo-InvestigatorUniversity of
Dr. Lawrence A. SromovskyGeneral ContactUniversity of

Selected References

Sromovsky, L. A., et al., Galileo net flux radiometer experiment, Space Sci. Rev., 60, No. 1/4, 233-262, May 1992.

Sromovsky, L. A., et al., Solar and thermal radiation in Jupiter's atmosphere: Initial results of the Galileo probe net flux radiometer, Science, 272, No. 5263, 851-854, May 1996.

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