Fig. 1From: Bootstrapping Swarm and observatory data to generate candidates for the DGRF and IGRF-13a, d Spatial distributions of Swarm A data according to the quasi-dipole latitude and time in modified Julian days. b, e Temporal histograms of the number of data (scalar and vector) using bins 5 days wide. c, f Number of Swarm A data as a function of the quasi-dipole latitude (bins every 2°). Upper panel: Swarm A data for DGRF parent model and modified Julian days relative to 2015.0. Lower panel: Swarm A data for IGRF parent model and modified Julian days relative to 2019.16Back to article page