GLS Approaches using SBAS: a SBAS to GBAS converter

Abstract

We build a prototype system intended to bring together the advantages of both the ground based and satellite based augmentation systems (GBAS, SBAS). It combines an SBAS-capable global navigation satellite systems receiver with a database and a GBAS-compatible data link. The correction and integrity data received from the SBAS satellite are automatically translated into GBAS-compatible structures and sent to the airborne multi-mode receiver using the final approach segment data block. This receiver can now send deviations directly to the autopilot making automated landings possible. The device can be installed on the ground as well as in the aircraft. As commercial air transport aircraft are rarely equipped with SBAS capable receivers but are increasingly fitted with GBAS receivers our System adds the SBAS capability to a GBAS equipped aircraft. Here, we present algorithms and data collected during validation flights and a case study on the economic impact for airport operators.