Fig. 2
From: Toward more complete magnetic gradiometry with the Swarm mission
Variance at satellite altitude (\(r = a + 460\) km) of the estimated model parameters from each observable a \(\varvec{\Gamma }^{(1)}\), b \(\varvec{\Gamma }^{(2)}\) and c \(\varvec{\Gamma }^{(0)}\), based on their analytical expressions, Eqs. (28), (30) and (32), respectively. White represents low information content, whereas green represents high information content