Kraus-type radio telescope

Short description: Type of radio telescope designed by American astrophysicist John D. Kraus

The Kraus-type radio telescope design was created by Dr. John D. Kraus (1910–2004).

Kraus-type telescopes are transit instruments, where the flat primary mirror reflects radio waves towards the spherical secondary mirror, which focuses it towards a mobile focal carriage.[1] The primary tilts north–south to select any object near the meridian,[2] while the focal carriage moves east–west along railroad ties to track objects near transit.[1]

## Examples

The Nançay radio telescope in France and the former Big Ear in Ohio are Kraus-type telescopes,[1][2] and the southern section of the RATAN-600 ring in Russia can operate as a Kraus-type telescope.[3]

## References

1. ↑ 1.0 1.1 1.2 van Driel, W.; Pezzant, J.; Gerard, E. (1997). "Renovating the Nançay radio telescope: the FORT project". High-Sensitivity Radio Astronomy. Cambridge University Press. p. 229. ISBN 978-0521573504. https://www.google.com/books/edition/High_Sensitivity_Radio_Astronomy/9MTbtJJ0vycC?hl=en&gbpv=1&pg=PA229. Retrieved 4 June 2025.
2. ↑ 2.0 2.1 Ehman, Jerry R. (2011). ""Wow!" - A Tantalizing Candidate". in Shuch, H. Paul. Searching for Extraterrestrial Intelligence: SETI Past, Present, and Future. Springer. pp. 47–48. doi:10.1007/978-3-642-13196-7_4. ISBN 978-3642131967. https://www.google.com/books/edition/Searching_for_Extraterrestrial_Intellige/jAk9bTm3Sj4C?hl=en&gbpv=1&pg=PA47. Retrieved 4 June 2025.
3. ↑ Wang, Jie (2024). Eye Beyond the Sky: 27 Telescopes and Space Probes, from Hooker to JWST. Springer Nature Singapore. pp. 105–106. https://www.google.com/books/edition/Eye_Beyond_the_Sky/YvYhEQAAQBAJ?hl=en&gbpv=1&pg=PA105. Retrieved 4 June 2025.

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