Distribution of directions for power dipoles estimated from independent 100-multipole bins for simulated HM Commander maps with the common mask applied. The fraction of dipoles pointing towards a given ecliptic latitude direction is shown, where the data are binned by the cosine of the direction, since it is this quantity that is uniformly distributed on the sky for a Gaussian random field. The horizontal black lines show the expected 95% deviation taken from a uniform distribution. The coloured lines show the distributions for temperature at ℓ <  800 (red line), temperature at ℓ >  800 (green line), EE polarization at ℓ <  800 (blue line), and EE polarization at ℓ >  800 (magenta line). The temperature results are determined using uniform weighting, while the EE results have inverse-variance weighting applied.