使用本类里的单选按钮，你可以选择使用底片常数的一次、二次或三次拟合。

Using the radio buttons in this section, you can set the software to use linear, quadratic or cubic fits for the plate constants. Small field CCDs usually require no more than a linear fit.

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建立了三次拟合曲线方程，通过实际数据的检验，验证了该方法的拟合效果。

Furthermore, a Cubic Curve-fitting equation deduces and set up. In the end, through a group of actual data, the effect of this new method is validated.

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说明：一，二，三次拟合，并得到R方的检验。输入任何矩阵，得出险要的值。

One, two, three fitting and get R-square test. Enter any matrix derived advantageous values.

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