  Mobile communication towers represent a relatively new but growing
contributor to the total radio leakage associated with planet Earth. We
investigate the overall power contribution of mobile communication towers to
the Earth\'s radio leakage budget, as seen from a selection of different nearby
stellar systems. We created a model of this leakage using publicly available
data of mobile tower locations. The model grids the planet's surface into
small, computationally manageable regions, assuming a simple integrated
transmission pattern for the mobile antennas. In this model, these mobile tower
regions rise and set as the Earth rotates. In this way, a dynamic power
spectrum of the Earth was determined, summed over all cellular frequency bands.
We calculated this dynamic power spectrum from three different viewing points,
HD 95735, Barnard star, and Alpha Centauri A. Our preliminary results
demonstrate that the peak power leaking into space from mobile towers is $\sim
4$GW. This is associated with LTE mobile tower technology emanating from the
East Coast of China as viewed from HD 95735. We demonstrate that the mobile
tower leakage is periodic, direction dependent, and could not currently be
detected by a nearby civilization located within 10 light years of the Earth,
using instrumentation with a sensitivity similar to the Green Bank Telescope.
We plan to extend our model to include more powerful 5G mobile systems, radar
installations, ground based uplinks (including the Deep Space Network), and
various types of satellite services, including low Earth orbit constellations
such as Starlink and OneWeb.
