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Lightning and Radio Emission Detector (LRD)

NSSDCA ID: 1989-084E-06

Mission Name: Galileo Probe
Principal Investigator:Dr. Louis J. Lanzerotti


The objectives of this investigation are to: (1) verify the existence of lightning on Jupiter and measure its basic physical characteristics and (2) measure radio frequency noise levels and one magnetic field component near Jupiter. Two instruments are used for this investigation: an electromagnetic sensor and an optical sensor. The electromagnetic sensor has a ferrite-core antenna with a preamplifier as an radio frequency sensor. The frequency domain is 3, 15, and 100 kHz narrow-band. The time domain is 1 Hz to 100 kHz, and the resolution is 16 s. The optical sensor has a photodiode with a fisheye lens. There is coincidence and anticoincidence between the radio frequency and optical sensors. The electromagnetic sensor is mounted under the Probe afterbody, while the optical sensor is mounted on the Probe envelope, looking out perpendicularly to the Probe spin axis. The total mass is 1.1 kg and the total continuous power is 1.0 W.

Alternate Names

  • GalileoProbe/LRD
  • LRD
  • urn:nasa:pds:context:instrument:gp.lrd

Facts in Brief

Mass: 2.5 kg
Power (avg): 3 W
Bit rate (avg): 0.008 kbps

Funding Agency

  • NASA-Office of Space Science (United States)


  • Planetary Science: Atmospheres

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. G. DehmelCo-InvestigatorTechnische Universitat Braunschweig
Mr. John D. MihalovCo-InvestigatorNASA Ames Research
Dr. Klaus RinnertCo-InvestigatorMax-Planck-Institut fur Aeronomie
Dr. Fritz O. GliemCo-InvestigatorTechnische Universitat Braunschweig
Dr. E. Philip KriderCo-InvestigatorUniversity of
Dr. Martin A. UmanCo-InvestigatorUniversity of
Dr. G. SchmidkeCo-InvestigatorUniversitat Kiel
Dr. Louis J. LanzerottiGeneral ContactAT&T Bell
Dr. Louis J. LanzerottiPrincipal InvestigatorAT&T Bell

Selected References

  • Lanzerotti, L. J., et al., The lightning and radio emission detector (LRD) instrument, Space Sci. Rev., 60, No. 1/4, 91-109, doi:10.1007/BF00216851, May 1992.
  • Lanzerotti, L. J., et al., Radio frequency signals in Jupiter's atmosphere, Science, 272, No. 5263, 858-860, doi:10.1126/science.272.5263.858, May 1996.
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