A measurement at the first acoustic peak of the CMB with the 33 GHz   interferometer
  This paper presents the results from the Jodrell Bank-IAC two-element 33 GHz interferometer operated with an element separation of 32.9 wavelengths and hence sensitive to 1 deg scale structure on the sky. The level of CMB fluctuations, assuming a flat CMB spatial power spectrum over the range of multipoles l = 208 +- 18, was found using a likelihood analysis to be \Delta T_l = 63^{+7}_{-6} mu K at the 68% confidence limit, after the subtraction of the contribution of monitored point sources. Other possible foreground contributions have been assessed and are expected to have negligible impact on this result. 
D. L. Harrison (1), J. A. Rubino-Martin (2), S. J. Melhuish (1), R. A.   Watson (1), R. D. Davies (1), R. Rebolo (2,3), R. J...