The following scripts calculate the A, B, C, P coefficients to model a set of SN curves with varying R values: sin_curve_fit_R.zip
sn_curve_fit_R.m is the main script.
The remaining scripts are supporting functions.
The equations are given in: sn_curvefit_equation.pdf
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References:
1. MIL-HDBK-5J
2. NASGRO NASFORM manual
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– Tom Irvine