The GBAS onboard test equipment, which is comprised of a multi-mode receiver, a DGPS receiver, a RF power meter, a spectrum analyzer, a controller, a power supply and a display monitor, is used to evaluate the functionalities and performance of the GBAS ground system. The purpose of this paper is to introduce the software design for the equipment. Therefore, this paper describes hardware configuration of the equipment, software functional requirements, software architecture and software interfaces.

Keywords: grond based augmentation system, onboard test equipment, multi-mode receiver