Fig. 6From: Investigation of geomagnetic reference models based on the Iridium\(^{\circledR }\) constellationExample observatory processing for Kakioka (KAK) observatory. Left panels show the original hourly mean data minus CHAOS (core and magnetospheric) model (blue), filtered data (green), and daily means (red) for the \(B_r, B_{\theta }, B_{\phi }\) components. Right panels show the same filtered data (green), daily means (red), monthly means (blue), and computed crustal bias (dark green line)Back to article page