Correction to: GPS Solutions (2020) 24:99 https://doi.org/10.1007/s10291-020-01014-w

In the original version of this article, equation (9) was displayed incorrectly. The correct equation is provided below:

$$ \left( {G_{N} \cdot \cos a + G_{E} \cdot \sin a } \right) \cdot {\text{mf}}^{G} $$
(9)