Pitch refers to motion in the z-direction of the telescope. Prior to October 2022, the case of the nominal dither period, the pitch is 707 s for ACIS and 768 s for HRC. After October 2022, the default period for ACIS has been increased to 1414.2 s. Table 5.4 in the POG gives the other default dither parameters in terms of pitch and yaw.