  Radio detection of inclined air showers currently receives special attention.
It can be performed with very sparse antenna arrays and yields a pure
measurement of the electromagnetic air-shower component, thus delivering
information that is highly complementary to the measurement of the muonic
component using particle detectors. However, radio-based reconstruction of
inclined air showers is challenging in light of asymmetries induced in the
radio-signal distribution by early-late effects as well as the superposition of
geomagnetic and charge-excess radiation. We present a model for the signal
distribution of radio emission from inclined air showers which allows explicit
compensation of these asymmetries. In a first step, geometrical early-late
asymmetries are removed. Secondly, a universal parameterization of the
charge-excess fraction as a function of the air-shower geometry, the
atmospheric density profile and the lateral distance from the shower axis is
used to compensate for the charge-excess contribution to the signal. The
resulting signal distribution of the pure geomagnetic emission is then fit with
a rotationally symmetric lateral distribution function, the area integration of
which yields the radiation energy as an estimator for the cosmic-ray energy. We
present the details and performance of our model, which lays the foundation for
robust and precise reconstruction of inclined air showers from radio
measurements.
