Simple tools for working with Mode-S/ADS-B receivers. modesd is tool for POSIX systems to send Mode-S as UDP packets over a network. Since it can send to multiple hosts/ports, it is effectively a device multiplexer. Supports SPRUT (microADS-B) and Aurora SSRx (in binary mode). Tested on Linux and MacOS X. Adam Fritzler <mid@zigamorph.net>