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High-statistics $\pi^-\pi^-$ and $\pi^+\pi^+$ femtoscopy data are presentedfor Au+Au collisions at $\sqrt{s_\mathrm{NN}}=2.4$ GeV, measured with HADES atSIS18/GSI. The experimental correlation functions allow the determination ofthe space-time extent of the corresponding emission sources via a comparison tomodels. The emission source, parametrized as three-dimensional Gaussiandistribution, is studied in dependence on pair transverse momentum, azimuthalemission angle with respect to the reaction plane, collision centrality andbeam energy. For all centralities and transverse momenta, a geometricaldistribution of ellipsoidal shape is found in the plane perpendicular to thebeam direction with the larger extension perpendicular to the reaction plane.For large transverse momenta, the corresponding eccentricity approaches theinitial eccentricity. The eccentricity is smallest for most central collisions,where the shape is almost circular. The magnitude of the tilt angle of theemission ellipsoid in the reaction plane decreases with increasing centralityand increasing transverse momentum. All source radii increase with centrality,largely exhibiting a linear rise with the number of participants, irrespectiveof transverse momentum. A substantial charge-sign difference of the sourceradii is found, appearing most pronounced at low transverse momentum. Theextracted source parameters are consistent with the extrapolation of theirenergy dependence down from higher energies.

Identical pion intensity interferometry at sqrt(s_{NN})=2.4 GeV