CPC H04B 7/22 (2013.01) [G01V 9/007 (2013.01)] | 26 Claims |
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.
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