Figure 3From: Performance analysis of an optically pumped magnetometer in Earth’s magnetic fieldExtracted center frequencies of the magnetic resonances for both circular polarizations of the laser as a function of the heading angle α. Also the mean frequencies of the two helicities are given. The latter roughly corresponds to the Larmor frequency measured by the LSD-Mz mode. The diamonds and dots correspond to a \(B_{1}\) field that is applied respectively in plane of rotation and perpendicular to it. Away from \(\pm \pi /2\) the two coils produce the same result. Additionally, theoretical curves describing the expected light shift are added as solid orange and blue linesBack to article page