Correction: A New Quaternion-Based Kalman Filter for Real-Time Attitude Estimation Using the Two-Step Geometrically-Intuitive Correction Algorithm. Sensors 2017, 17, 2146.

The authors wish to make the following corrections to their paper [...].

The authors wish to make the following corrections to their paper [1]:

In page 7, “The two-step correction process is described as follows:” should be revised as “The two-step correction process is described as follows [31]:”. Meanwhile, the corresponding reference “31. Del Rosario, M.B.; Lovell, N.H.; Redmond, S.J. Quaternion-based complementary filter for attitude determination of a smartphone. IEEE Sens. J. 2016, 16, 6008–6017.” should be added in the references part.

In page 11, “and we can rewrite the function as:” should be revised as “and we can rewrite the function as [32]:”. Meanwhile, the corresponding reference “32. Valenti, R.G.; Dryanovski, I.; Xiao, J.Z. A linear kalman filter for marg orientation estimation using the algebraic quaternion algorithm. IEEE Trans. Instrum. Meas. 2016, 65, 467–481.” should be added in the references part.

The authors would like to apologize for any inconvenience caused to the readers by these changes.