spectra out to l of 1500 much more accurately than previously, and more accurate cosmological parameter estimates. Observations with the VSA continued until the end of August 2008, using the Super-Extended configuration. Also, the Ryle Telescope has been upgraded to detect lower flux point sources, and the OCRA receiver on a telescope in Poland will be used to more accurately subtract the point sources. See also Very Large Array References Further reading Cavendish Laboratory Cosmic microwave background experiments Interferometric telescopes Jodrell Bank Observatory Radio telescopes Science and Technology Facilities Council