This publication is the fourth of a series of articles devoted to the description of technology of determination the parameters of a gravitational field of Earth on gradiometric measurements. Step by step components computation algorithm for the coefficients determination and the differences between the measured components of tenzor gravity and computed ones. Firstly, we compute the first and second derivatives of the gravity potential with respect to the spherical coordinates. On the second step we compute the first and second derivatives of the gravity potential with respect to the rectangular coordinates in local north-oriented coordinate system. On the last step we transform the tenzor components from the local north-oriented coordinate system to gradiometric coordinate system. We can obtain the differences: the measured components of tenzor gravity minus the computed components of tenzor gravity in gradiometric coordinate system.