# 3D reconstructions

**2017**

## inference of random fields, peculiar velocities and tidal interactions

The phase-space of the cosmic large-scale structure is only partially accessible to observations. The resolution of structures along the line of sight is particularly difficult in weak lensing observations, but also in galaxy surveys one deals with rather large radial uncertainties. For that purpose, we employ 3d-decompositions and investigate the observability of 3d-Fourier modes, in weak lensing and in cross-correlation with other tracers, and compute effects that are sensitive to large-scale velocity fields.