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This commit is contained in:
Timur A. Fatkhullin
2025-08-19 11:52:54 +03:00
parent da46ab3e3b
commit c6a1caea08
4 changed files with 413 additions and 79 deletions
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74
mcc/mcc_ccte_erfa.h
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@@ -299,12 +299,21 @@ public:
using real_days_t = std::chrono::duration<double, std::ratio<86400>>;
double ut1 = jd.MJD();
double tt = jd.MJD();
using jd_t = decltype(jd);
double mjd;
if constexpr (std::floating_point<jd_t>) {
mjd = jd - ERFA_DJM0;
} else {
mjd = jd.MJD();
}
double ut1 = mjd;
double tt = mjd;
std::lock_guard lock{*_stateMutex};
auto dut1 = _currentState._bulletinA.DUT1(jd.MJD());
auto dut1 = _currentState._bulletinA.DUT1(mjd);
if (dut1.has_value()) {
ut1 += std::chrono::duration_cast<real_days_t>(dut1.value()).count();
@@ -312,7 +321,7 @@ public:
return MccCCTE_ERFAErrorCode::ERROR_BULLETINA_OUT_OF_RANGE;
}
auto tai_utc = _currentState._leapSeconds[jd.MJD()];
auto tai_utc = _currentState._leapSeconds[mjd];
if (tai_utc.has_value()) {
tt += std::chrono::duration_cast<real_days_t>(tai_utc.value()).count();
} else {
@@ -471,7 +480,8 @@ public:
double eo, lst, ha, dec, az, alt;
auto lst_eo = [&]() {
ret = eqOrigins(from_pt.time_point, &eo);
// ret = eqOrigins(from_pt.time_point, &eo);
ret = equationOrigins(from_pt.time_point, &eo);
if (!ret) {
ret = timepointToAppSideral(from_pt.time_point, &lst, true);
}
@@ -566,7 +576,7 @@ public:
return icrs2obs(from_pt, to_pt);
}
// from apparent: copy corresponded coordinates and compute other ones
// from apparent: copy corresponded coordinates and compute other ones (ignore to_pt->pair_kind)
if (from_pt.pair_kind == MccCoordPairKind::COORDS_KIND_RADEC_APP) {
to_pt->RA_APP = from_pt.X;
to_pt->DEC_APP = from_pt.Y;
@@ -647,6 +657,58 @@ public:
return ret;
}
// equation of the origins
error_t equationOrigins(mcc_julday_c auto const& jd, mcc_angle_c auto* eo)
{
if (eo == nullptr) {
return MccCCTE_ERFAErrorCode::ERROR_OK;
}
auto ret = MccCCTE_ERFAErrorCode::ERROR_OK;
double tt, mjd;
if constexpr (std::floating_point<decltype(jd)>) {
mjd = jd - ERFA_DJM0;
} else {
mjd = jd.MJD();
}
std::lock_guard lock{*_stateMutex};
using real_days_t = std::chrono::duration<double, std::ratio<86400>>;
auto tai_utc = _currentState._leapSeconds[mjd];
if (tai_utc.has_value()) {
tt = jd.MJD() + std::chrono::duration_cast<real_days_t>(tai_utc.value()).count();
auto tt_tai = _currentState._bulletinA.TT_TAI();
tt += +std::chrono::duration_cast<real_days_t>(tt_tai).count();
*eo = eraEo06a(ERFA_DJM0, tt);
} else {
ret = MccCCTE_ERFAErrorCode::ERROR_LEAPSECONDS_OUT_OF_RANGE;
}
return ret;
}
error_t equationOrigins(mcc_time_point_c auto const& tp, mcc_angle_c auto* eo)
{
if (eo == nullptr) {
return MccCCTE_ERFAErrorCode::ERROR_OK;
}
MccJulianDay jd;
auto ret = timepointToJulday(tp, &jd);
if (ret) {
return ret;
}
return equationOrigins(std::move(jd), eo);
}
// refraction