초록 ▼

Disclosed are a global navigation satellite system (GNSS) landing system (GLS) and methods of using the same to calculate a vertical deviation from the glide slope of the aircraft. A GNSS antenna and position determining circuitry are used to determine the position of the aircraft as a function of r

Disclosed are a global navigation satellite system (GNSS) landing system (GLS) and methods of using the same to calculate a vertical deviation from the glide slope of the aircraft. A GNSS antenna and position determining circuitry are used to determine the position of the aircraft as a function of received GNSS positioning signals. Vertical deviation computation circuitry coupled to the position determining circuitry calculates an angular vertical deviation .alpha..sub.v from the glide slope of the aircraft as a function of the total horizontal distance between the aircraft and a GLS elevation reference point (GERP).

대표청구항 ▼

[ What is claimed is:] [1.]1. A global navigation satellite system (GNSS) landing system (GLS) for use in an aircraft preparing to land on a runway, the GLS comprising:a GNSS antenna adapted to receive GNSS positioning signals from a plurality of GNSS satellites;position determining circuitry couple

[ What is claimed is:] [1.]1. A global navigation satellite system (GNSS) landing system (GLS) for use in an aircraft preparing to land on a runway, the GLS comprising:a GNSS antenna adapted to receive GNSS positioning signals from a plurality of GNSS satellites;position determining circuitry coupled to the GNSS antenna and adapted to determine a position of the aircraft as a function of the received GNSS positioning signals; andvertical deviation computation circuitry coupled to the position determining circuitry and adapted to calculate an angular vertical deviation .alpha..sub.v from a glide slope of the aircraft as a function of a total horizontal distance between the aircraft and a GLS elevation reference point (GERP) using the relationship:where u.sub.rw is a vector which extends from a reference datum point (RDP) toward a flight path alignment point (FPAP) co-linear with the center line of the runway, where u.sub.lat is a vector which extends from the RDP in a direction perpendicular to vector u.sub.rw, and where .DELTA.r is a vector extending from a glide path intercept point (GPIP) on the center line of the runway toward a guidance control point (GCP) of the aircraft;wherein the GERP is offset laterally from a center line of the runway.