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/**
* @author Attila Kovacs
* @version IERS Conventions v1.3.0
*
* Earth orientation model data for variations in _x_<sub>p</sub> _y_<sub>p</sub> and
* DUT1 due to librations, with periods less than 2 days. (Longer period terms are
* included in the IAU2000A nutation model).
*/
/**
* Polar migration due to librations. From IERS Conventions Chapter 5, Table 5.1a.
*
* REFERENCES:
* <ol>
* <li>https://iers-conventions.obspm.fr/content/chapter5/icc5.pdf</li>
* </ol>
*
* @since 1.5
*/
static const novas_eop_terms polar_libration_terms[10] = { //
// xp yp
// sin cos sin cos
{ { 1, -1, 0, -2, 0, -1 }, -0.40, 0.30, -0.30, -0.40 }, //
{ { 1, -1, 0, -2, 0, -2 }, -2.30, 1.30, -1.30, -2.30 }, //
{ { 1, 1, 0, -2, -2, -2 }, -0.40, 0.30, -0.30, -0.40 }, //
{ { 1, 0, 0, -2, 0, -1 }, -2.10, 1.20, -1.20, -2.10 }, //
{ { 1, 0, 0, -2, 0, -2 }, -11.40, 6.50, -6.50, -11.40 }, //
{ { 1, -1, 0, 0, 0, 0 }, 0.80, -0.50, 0.50, 0.80 }, //
{ { 1, 0, 0, -2, 2, -2 }, -4.80, 2.70, -2.70, -4.80 }, //
{ { 1, 0, 0, 0, 0, 0 }, 14.30, -8.20, 8.20, 14.30 }, //
{ { 1, 0, 0, 0, 0, -1 }, 1.90, -1.10, 1.10, 1.90 }, //
{ { 1, 1, 0, 0, 0, 0 }, 0.80, -0.40, 0.40, 0.80 } //
};
/**
* UT1 variations due to librations. From IERS Conventions Chapter 5, Table 5.1b.
*
* REFERENCES:
* <ol>
* <li>https://iers-conventions.obspm.fr/content/chapter5/icc5.pdf</li>
* </ol>
*
* @since 1.5
*/
static const novas_eop_terms dut1_libration_terms[11] = {
// UT1 LOD
// sin cos sin cos
{ { 2, -2, 0, -2, 0, -2 }, 0.05, -0.03, -0.30, -0.60 }, //
{ { 2, 0, 0, -2, -2, -2 }, 0.06, -0.03, -0.40, -0.70 }, //
{ { 2, -1, 0, -2, 0, -2 }, 0.35, -0.20, -2.40, -4.20 }, //
{ { 2, 1, 0, -2, -2, -2 }, 0.07, -0.04, -0.50, -0.80 }, //
{ { 2, 0, 0, -2, 0, -1 }, -0.07, 0.04, 0.50, 0.80 }, //
{ { 2, 0, 0, -2, 0, -2 }, 1.75, -1.01, -12.20, -21.30 }, //
{ { 2, 1, 0, -2, 0, -2 }, -0.05, 0.03, 0.30, 0.60 }, //
{ { 2, 0, -1, -2, 2, -2 }, 0.05, -0.03, -0.30, -0.60 }, //
{ { 2, 0, 0, -2, 2, -2 }, 0.76, -0.44, -5.50, -9.50 }, //
{ { 2, 0, 0, 0, 0, 0 }, 0.21, -0.12, -1.50, -2.60 }, //
{ { 2, 0, 0, 0, 0, -1 }, 0.06, -0.04, -0.40, -0.80 } //
};
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