integraalne sagedushälve, rms of filtered time interval error (TIE), where the band-pass filter is centred on a frequency of 0,42/τ

quantity what is defined as the square root of the mean square (the arithmetic mean of the squares of a set of numbers), suurus, mis on määratletud kui ruutjuur keskmiste ruutude summast (mõõdiste (arvude) kogumi ruutude aritmeetiline keskmine)