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公开(公告)号：US12298137B2
公开(公告)日：2025-05-13
申请号：US18295746
申请日：2023-04-04
Applicant: Honeywell International Inc.
Inventor： Trevor Keith Stephens , Brian Schipper , Ross Merritt
Abstract: A method and system for celestial navigation are provided. The method comprises requesting access to a light source on a low earth orbit (LEO) satellite; and sending an uplink message to the LEO satellite to power on the light source, in response to the access request. The method further comprises determining whether the LEO satellite is in view of a camera; capturing a light image, from the light source, on a focal plane location of the camera when the LEO satellite is in view of the camera; and comparing the focal plane location to a predicted location of the LEO satellite. The method updates position information of a user based on an observation error from comparing the focal plane location to the predicted location.
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公开(公告)号：US20250123104A1
公开(公告)日：2025-04-17
申请号：US18487778
申请日：2023-10-16
Applicant: Honeywell International Inc.
Inventor： Trevor Keith Stephens , Ross Merritt , Brian Schipper
Abstract: Techniques are disclosed for improving daylight performance of a star tracker. A region of interest (ROI) within a field of view of sky is obtained. The region of interest is divided into sub-ROIs. Sub-ROIs including a candidate celestial object are identified. An angular velocity of each candidate celestial object is determined. The known celestial object is a candidate celestial object identified as having a angular velocity, during a time period, that is within a range of angular velocities about a known angular velocity associated with the known celestial object.
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公开(公告)号：US20240337494A1
公开(公告)日：2024-10-10
申请号：US18295746
申请日：2023-04-04
Applicant: Honeywell International Inc.
Inventor： Trevor Keith Stephens , Brian Schipper , Ross Merritt
CPC classification number: G01C21/025 , G06V20/56
Abstract: A method and system for celestial navigation are provided. The method comprises requesting access to a light source on a low earth orbit (LEO) satellite; and sending an uplink message to the LEO satellite to power on the light source, in response to the access request. The method further comprises determining whether the LEO satellite is in view of a camera; capturing a light image, from the light source, on a focal plane location of the camera when the LEO satellite is in view of the camera; and comparing the focal plane location to a predicted location of the LEO satellite. The method updates position information of a user based on an observation error from comparing the focal plane location to the predicted location.
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公开(公告)号：US20240085182A1
公开(公告)日：2024-03-14
申请号：US17941846
申请日：2022-09-09
Applicant: Honeywell International Inc.
Inventor： Blaise Morton , Paul Samanant , Trevor Keith Stephens , Robert Compton
IPC: G01C21/08 , G01C21/00 , G01C21/16 , G01R33/028
CPC classification number: G01C21/08 , G01C21/1654 , G01C21/3896 , G01R33/028
Abstract: A system and method for magnetic navigation are provided. The system comprises a navigation system for a vehicle, at least one processor operatively coupled with the navigation system, and a magnetic navigation module operatively coupled with the processor. The magnetic navigation module including instructions, executable by the processor, to perform a method comprising selecting latitude, longitude, and altitude ranges for the vehicle that is expected to travel in a region of interest; obtaining one or more magnetic anomaly maps for the region of interest; choosing a base Earth-centered, Earth-fixed (ECEF) plane and coordinates for the one or more magnetic anomaly maps; constructing an integration mesh on the base ECEF plane; and performing a Strakhov iteration process on the integration mesh to compute values of magnetic anomalies on a base source. The method then computes an estimated magnetic anomaly at a given point in space using alternative computation approaches.
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