Solar Physics

, Volume 226, Issue 1, pp 143–151 | Cite as

Callisto – A New Concept for Solar Radio Spectrometers

  • Arnold O. BenzEmail author
  • Christian Monstein
  • Hansueli Meyer


A new radio spectrometer, CALLISTO, is presented. It is a dual-channel frequency-agile receiver based on commercially available consumer electronics. Its major characteristic is the low price for hardware and software, and the short assembly time, both two or more orders of magnitude below existing spectrometers. The instrument is sensitive at the physical limit and extremely stable. The total bandwidth is 825 MHz, and the width of individual channel is 300 kHz. A total of 1000 measurements can be made per second. The spectrometer is well suited for solar low-frequency radio observations pertinent to space weather research. Five instruments of the type were constructed until now and put into operation at several sites, including Bleien (Zurich) and NRAO (USA). First results in the 45–870 MHz range are presented. Some of them were recorded in a preliminary setup during the time of high solar activity in October and November 2003.


Solar Activity Physical Limit Assembly Time Space Weather Solar Radio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Arnold O. Benz
    • 1
    Email author
  • Christian Monstein
    • 1
  • Hansueli Meyer
    • 1
  1. 1.Institute of AstronomyETH ZürichZurichSwitzerland

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