Gravitational model in terms of Zernike circle polynomial coefficients. The squares, triangles, circles, and diamond represent OOF holography observations from December 2019, December 2020, February 2021, and March 2021, respectively. The red line is the best fit made to the data using Eq. (17) with three $g_{n\ell }^{(i)}$ coefficients. A flat model indicates that no corrections are needed to the K_n𝓁 coefficient.