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We study the sensitivity of a pair of Einstein Telescopes (ET)(hypothetically located at the two sites currently under consideration for ET)to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). Wefocus on the $\ell =0,2,4$ multipoles of an expansion of the SGWB in sphericalharmonics, since the sensitivity to other multipoles is suppressed due to thefact that this pair of detector operates in a regime for which the productbetween the observed frequency and the distance between the two sites is muchsmaller than one. In this regime, the interferometer overlap functions for theanisotropic signal acquire very simple analytic expressions. These expressionscan also be applied to any other pairs of interferometers (each one ofarbitrary opening angle between its two arms) operating in this regime. Oncethe measurements at the vertices of the two sites are optimally combined, thesensitivity to the multipoles of the SGWB depends only on the latitude of thetwo sites, on the difference of their longitude, but not on the orientation oftheir arms.

ET sensitivity to the anisotropic Stochastic Gravitational Wave Background