  In this work, we investigate the tunneling characteristics of Majorana zero
modes (MZMs) in vortex lattices based on scanning tunneling microscopy
measurement. We find that zero bias conductance does not reach the quantized
value owing to the coupling between the MZMs. On the contrary, the Fano factor
measured in the high voltage regime reflects the local particle-hole asymmetry
of the bound states and is insensitive to the energy splitting between them. We
propose using spatially resolved Fano factor tomography as a tool to identify
the existence of MZMs. In both cases of isolated MZM or MZMs forming bands,
there is a spatially resolved Fano factor plateau at one in the vicinity of a
vortex core, regardless of the tunneling parameter details, which is in stark
contrast to other trivial bound states. These results reveal new tunneling
properties of MZMs in vortex lattices and provide measurement tools for
topological quantum devices.
