A system and methods for onboard sense and avoidance of an object are disclosed. At least one transmitter and at least one transmitter location of the at least one transmitter are selected from a database of transmitters based on a vehicle location of a vehicle, and at least one total signal is received at the vehicle. The at least one total signal comprises a direct signal of at least one broadcast signal from the at least one transmitter, and a reflection signal comprising a reflection of the broadcast signal reflected off an object. An estimated object location of the object is estimated based on the at least one total signal, the at least one transmitter location, and the vehicle location.