AIRCRAFT LANDING SYSTEM USING RELATIVE GNSS
First Claim
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1. An aircraft landing system comprising:
- at least two mobile base station GNSS antennae at known fixed distances for receiving signals from a GNSS satellite constellation;
a mobile base station module operatively connected to the at least two mobile base station GNSS antennae and adapted to receive GNSS signals from the at least two GNSS antennae, extract measurement data therefrom, and determine relative positions of the GNSS antennae for specifying an approach path with respect to the relative positions of the mobile base station GNSS antennae, the mobile base station module also adapted to calculate a measured distance between the at least two mobile base station GNSS antennae using the relative positions and compare the measured distance with the known fixed distance to determine mobile base station integrity; and
a data transmitter for transmitting to an aircraft mobile base station integrity data, approach path data, and GNSS measurement data for at least one of the at least two mobile base station GNSS antennae.
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Abstract
A method for confirming mobile base station integrity in a relative GNSS aircraft landing system, the method comprising: determining a relative position of a first GNSS antenna fixed to the mobile base station with respect to a second GNSS antenna also fixed to the mobile base station by processing signals from a GNSS satellite constellation; calculating a distance between the first GNSS antenna and the second GNSS antenna using the measured relative position; comparing a calculated distance to a known fixed distance; and confirming mobile base station integrity if the calculated distance is within a predetermined threshold of the known fixed distance.
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Citations
28 Claims
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1. An aircraft landing system comprising:
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at least two mobile base station GNSS antennae at known fixed distances for receiving signals from a GNSS satellite constellation; a mobile base station module operatively connected to the at least two mobile base station GNSS antennae and adapted to receive GNSS signals from the at least two GNSS antennae, extract measurement data therefrom, and determine relative positions of the GNSS antennae for specifying an approach path with respect to the relative positions of the mobile base station GNSS antennae, the mobile base station module also adapted to calculate a measured distance between the at least two mobile base station GNSS antennae using the relative positions and compare the measured distance with the known fixed distance to determine mobile base station integrity; and a data transmitter for transmitting to an aircraft mobile base station integrity data, approach path data, and GNSS measurement data for at least one of the at least two mobile base station GNSS antennae. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for confirming mobile base station integrity in a relative GNSS aircraft landing system, the method comprising:
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determining a relative position of a first GNSS antenna fixed to the mobile base station with respect to a second GNSS antenna also fixed to the mobile base station by processing signals from a GNSS satellite constellation; calculating a distance between the first GNSS antenna and the second GNSS antenna using the measured relative position; comparing a calculated distance to a known fixed distance; and confirming mobile base station integrity if the calculated distance is within a predetermined threshold of the known fixed distance. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method for aircraft approach and landing using relative GNSS positioning, the method comprising:
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determining relative positions of at least two mobile base station GNSS antennae provided at a known fixed distance; determining an approach path relative to the at least two mobile base station GNSS antennae; confirming mobile base station integrity by comparing a measured distance between the mobile base station GNSS antennae with the known fixed distance; transmitting to an aircraft the mobile base station integrity data, approach path data, and satellite measurement data for one of the at least two mobile base station GNSS antennae; receiving the mobile base station integrity data, the approach path data, and the satellite measurement data at the aircraft; determining a relative position with integrity of an air GNSS antenna on the aircraft with respect to one of the at least two mobile base station GNSS antennae using combined satellite measurements from the air antenna and the mobile base station antenna; and determining approach guidance using the relative position of the air and mobile base station GNSS antennae and the approach path data. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification