Skits NM

Hello all, I would like replace the variable names Scalar_gravity and dGz, (together with their units m/s2) to T and dT, respectively so that at the end the variable Scalar_gravity is replaced with T and the variable dGz is replaced with dT, both having units of nT. In this way the data that falls under Scalar_gravity will now be "titled" T and those under dGz will be "titled" dT. Please see attached screenshot of the file I'd like to change. Any form of help is highly appreciated. Thanks, skits...