ADS-B Traffic Simulator is a software that allows definition of ADS-B traffic scenarios consisting of up to 1000 animated aircraft. A standard compliant set of ADS-B DF17 messages consisting of position, velocity and status messages are generated according to DO260/A/B (MOPS 0,1,2). Functions allow automatic animations like flying in circles or along vectors. The messages are generated on a network stream to be fed into the visualization or ASTERIX generation software. Additionally it can be fed to the AVIONIX SSR Message Generator to generate a real RF scenario for compliance and load tests.