  Radio detection of inclined air showers is currently receiving great
attention. To exploit the potential, a suitable event reconstruction needs to
be developed. The first step in this direction is the development of a model
for the lateral distribution of the radio signals, which in the case of
inclined air showers exhibits asymmetries due to "early-late" effects in
addition to the usual asymmetries from the superposition of charge-excess and
geomagnetic emission. We present a model which corrects for all asymmetries and
successfully describes the lateral distribution of the energy fluence with a
rotationally symmetric function. This gives access to the radiation energy as a
measure of the energy of the cosmic-ray primary, and is also sensitive to the
depth of the shower maximum.
