Translation calibration of inverse-kappa goniometers in macromolecular crystallography

Brockhauser, S.; White, K.I.; McCarthy, A.A.; Ravelli, R.B.G.

doi:10.1107/S0108767311004831

Acta Crystallographica Section A
Acta Crystallographica
Section A FOUNDATIONS AND ADVANCES

IUCr IT WDC

home archive editors for authors for readers submit subscribe open access

view article

Figure 4
Calculation of linear and angular reconstruction errors. $[{\bi p}_1]$ is the scale-corrected location of a measured point at the angular setting $[{\psi _1}]$ . $[{\bi p}_2]$ is similarly at the angular setting $[{\psi _2}]$ . Assuming $[{\bi p}_1]$ is correctly measured at $[{\psi _1}]$ , the expected location at $[{\psi _2}]$ is shown as $[{\bi p}_2^{\prime}]$ . The three-dimensional distance between the expected ( $[{\bi p}_2^{\prime}]$ ) and measured ( $[{\bi p}_2]$ ) locations supplies the linear error δ_trans. The projection of the measured point $[{\bi p}_2]$ to the circle in the regression plane is shown as $[{\bi p}_2^{\prime\prime}]$ . The angular difference between the expected and measured rotation provides the angular error (δ_rot) of the measurement. Sample values of δ_rot and δ_trans are listed in Table 1

FOUNDATIONS
ADVANCES

ISSN: 2053-2733

Volume 67| Part 3| May 2011| Pages 219-228

https://doi.org/10.1107/S0108767311004831

Open

access

Follow Acta Cryst. A

Search IUCr Journals		doi		Advanced search
Author		volume	page