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Step Frequency Radiometers

NSSDCA ID: 1973-039A-01

Mission Name: RAE-B
Principal Investigator:Dr. Robert G. Stone


The Ryle-Vonberg (RV) receivers were designed to provide measurements that were relatively insensitive to gain and bandwidth changes. There were two receivers--RV-1 connected to the upper V-antenna and RV-2 connected to the lower V-antenna. The radiometers had an effective bandwidth of 40 kHz and a postdetection time constant of 0.1 s. A coarse output channel was obtained from the integrated servo-loop error signal, and a fine output channel was obtained from the noise source output required to match the antenna signal. The time constant for the fine channel was 0.5 s. A thermistor located in the receiver measured the ambient temperature, which was telemetered every 19.7 min in the housekeeping data. The receivers operated at nine frequencies from 0.45 to 9.18 MHz. Each frequency was selected for 15.4 s before stepping to the next. During this time, eight coarse and two fine samples were taken. Of the eight coarse samples, the first was not reliable since not enough time had elapsed for the receiver to stabilize after the frequency switch was made.

Alternate Names

  • Cosmic Noise Survey
  • RAE-B/StepFrequencyRadiometers

Funding Agency

  • NASA-Office of Space Science (United States)


  • Planetary Science: Fields and Particles
  • Solar Physics: Radio
  • Astronomy: Radio

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Mr. Richard R. WeberOther InvestigatorNASA Goddard Space Flight
Mr. Larry W. BrownOther InvestigatorNASA Goddard Space Flight
Dr. Robert G. StonePrincipal InvestigatorNASA Goddard Space Flight
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