US 12,170,567 B2
Systems and methods for generating electron density maps
Jackson McCormick, Atlanta, GA (US); and Morris Cohen, Atlanta, GA (US)
Assigned to Georgia Tech Research Corporation, Atlanta, GA (US)
Appl. No. 17/786,603
Filed by Georgia Tech Research Corporation, Atlanta, GA (US)
PCT Filed Dec. 21, 2020, PCT No. PCT/US2020/066359
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/127626, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/950,630, filed on Dec. 19, 2019.
Prior Publication US 2023/0124039 A1, Apr. 20, 2023
Int. Cl. H04B 7/22 (2006.01); G01V 9/00 (2006.01)
CPC H04B 7/22 (2013.01) [G01V 9/007 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method comprising:
receiving electromagnetic signals at receivers, the electromagnetic signals having propagated along a distinct propagation path through a portion of a D-region of an ionosphere corresponding to one or more grid pixels corresponding to at least a portion of the D-region of the ionosphere;
clustering at least a portion of the electromagnetic signals based on similarities in a point-of-origin of the electromagnetic signals, the clustered signals representative of a clustered path from a point of origin to one of the receivers through one or more of the grid pixels;
determining a path-averaged electron density curve for at least a portion of the clustered signals;
determining a basis representation of an electron density curve of the grid pixels, the basis representation consistent with the path-averaged electron density curves; and
generating, based at least in part on the determined basis representation, an electron density map for the at least a portion of the D-region of the ionosphere.