  With the growth of LoRa deployments there are plenty of anecdotal reports of
very long wireless links, well beyond the line of sight. Most reports suggest
that these links are related to anomalous tropospheric propagation. We
developed a platform to study tropospheric links based on TheThingsNetwork, a
popular LoRaWAN-based infrastructure. We present some preliminary results and
call for the IoT community to participate in this radio propagation experiment.
