US 12,298,409 B2
GNSS forecast and background obscuration prediction
Jeremy Charles Bennington, Greenwood, IN (US); Richard West, Paignton (GB); Paul Hansen, Cambridge (GB); Esther Anyaegbu, Northampton (GB); and Matthew Pottle, Paignton (GB)
Assigned to Spirent Communications PLC, Crawley (GB)
Filed by Spirent Communications PLC, Crawley (GB)
Filed on Sep. 19, 2022, as Appl. No. 17/948,182.
Application 17/948,182 is a continuation in part of application No. 17/706,421, filed on Mar. 28, 2022, granted, now 11,802,972.
Application 17/706,421 is a continuation of application No. 17/374,885, filed on Jul. 13, 2021, granted, now 11,287,531, issued on Mar. 29, 2022.
Claims priority of provisional application 63/407,589, filed on Sep. 16, 2022.
Claims priority of provisional application 63/051,849, filed on Jul. 14, 2020.
Claims priority of provisional application 63/161,386, filed on Mar. 15, 2021.
Prior Publication US 2023/0121760 A1, Apr. 20, 2023
Int. Cl. G01S 19/08 (2010.01); H04L 67/12 (2022.01); G08G 1/0968 (2006.01)
CPC G01S 19/08 (2013.01) [H04L 67/12 (2013.01); G08G 1/0968 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of representing distant objects for analysis of satellite line-of-sight visibility from a grid of points, the method comprising:
constructing a first 3D model of foreground objects that obscure line-of-sight visibility of satellites from the grid of points, wherein the first 3D model is at a first resolution, wherein at least some first model points denote obstruction edges of the foreground objects;
constructing a second 3D model of background objects that are more than a threshold distance away, further away than the foreground objects, and that obscure line-of-sight visibility of satellites from the grid of points, wherein the second 3D model is at a second resolution of second model points that is different from and coarser than the first resolution;
calculating a line-of-sight visibility of the satellites from the grid of points using both the foreground and background objects in the first and second 3D models; and
responding to a query for an area by providing line-of-sight visibility of the satellites for points of the grid within the area, as calculated.