...
This commit is contained in:
Timur A. Fatkhullin
parent
01d5657b1b
commit
0aa0113be3
@ -250,6 +250,51 @@ public:
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}
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// apparent sideral time (Greenwitch or local)
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error_t apparentSideralTime(mcc_coord_epoch_c auto const& epoch, mcc_angle_c auto* st, bool islocal = false)
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{
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error_t ret = MccCCTE_ERFAErrorCode::ERROR_OK;
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if (st == nullptr) {
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return MccCCTE_ERFAErrorCode::ERROR_NULLPTR;
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}
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using real_days_t = std::chrono::duration<double, std::ratio<86400>>;
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double ut1 = epoch.MJD();
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double tt = epoch.MJD();
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std::lock_guard lock{*_stateMutex};
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auto dut1 = _currentState._bulletinA.DUT1(epoch.MJD());
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if (dut1.has_value()) {
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ut1 += std::chrono::duration_cast<real_days_t>(dut1.value()).count();
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} else { // out of range
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return MccCCTE_ERFAErrorCode::ERROR_BULLETINA_OUT_OF_RANGE;
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}
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auto tai_utc = _currentState._leapSeconds[epoch.MJD()];
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if (tai_utc.has_value()) {
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tt += std::chrono::duration_cast<real_days_t>(tai_utc.value()).count();
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} else {
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return MccCCTE_ERFAErrorCode::ERROR_LEAPSECONDS_OUT_OF_RANGE;
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}
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auto tt_tai = _currentState._bulletinA.TT_TAI();
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tt += std::chrono::duration_cast<real_days_t>(tt_tai).count();
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*st = eraGst06a(ERFA_DJM0, ut1, ERFA_DJM0, tt);
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if (islocal) {
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*st = eraAnp(*st + _currentState.lon);
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}
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return ret;
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}
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// ICRS to observed
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// returned azimuth is counted from the South through the West
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error_t icrsToObs(mcc_angle_c auto const& ra_icrs,
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@ -401,7 +446,7 @@ public:
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}
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error_t equationOrigins(const mcc_julday_c auto& mjd, mcc_angle_c auto* eo)
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error_t equationOrigins(mcc_coord_epoch_c auto const& epoch, mcc_angle_c auto* eo)
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{
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if (eo == nullptr) {
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return MccCCTE_ERFAErrorCode::ERROR_NULLPTR;
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@ -413,6 +458,8 @@ public:
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using real_days_t = std::chrono::duration<double, std::ratio<86400>>;
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double mjd = epoch.MJD();
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auto tai_utc = _currentState._leapSeconds[mjd];
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if (tai_utc.has_value()) {
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double tt = mjd;
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@ -658,6 +705,10 @@ protected:
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*dec = d;
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}
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if (ha) {
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*ha = h;
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}
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if (az) {
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// NOTE: according to definition of astronomical azimuth it is counted from the South through the West, but
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// in the ERFA the azimuth is counted from the North through the East!!!
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110
mcc/mcc_coord.h
110
mcc/mcc_coord.h
@ -31,13 +31,13 @@ public:
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? MccCoordPairKind::COORDS_KIND_RADEC_APP
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// observed RA and DEC
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: (std::same_as<CO_LON_T, MccAngleRA_OBS> && std::same_as<CO_LAT_T, MccAngleDEC_OBS>)
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? MccCoordPairKind::COORDS_KIND_RADEC_APP
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? MccCoordPairKind::COORDS_KIND_RADEC_OBS
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// apparent HA and DEC
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: (std::same_as<CO_LON_T, MccAngleHA_APP> && std::same_as<CO_LAT_T, MccAngleDEC_APP>)
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? MccCoordPairKind::COORDS_KIND_HADEC_APP
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// observed HA and DEC
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: (std::same_as<CO_LON_T, MccAngleHA_OBS> && std::same_as<CO_LAT_T, MccAngleDEC_OBS>)
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? MccCoordPairKind::COORDS_KIND_HADEC_APP
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? MccCoordPairKind::COORDS_KIND_HADEC_OBS
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// apparent AZ and ZD
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: (std::same_as<CO_LON_T, MccAngleAZ> && std::same_as<CO_LAT_T, MccAngleZD>)
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? MccCoordPairKind::COORDS_KIND_AZZD
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@ -132,6 +132,11 @@ template <mcc_angle_c CO_LON_T, mcc_angle_c CO_LAT_T>
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class MccNamedCoordPair : public MccCoordPair<CO_LON_T, CO_LAT_T>
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{
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public:
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MccNamedCoordPair() : MccCoordPair<CO_LON_T, CO_LAT_T>(CO_LON_T{0.0}, CO_LAT_T{0.0}, MccCelestialCoordEpoch::now())
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{
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}
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template <typename CxT, typename CyT, mcc_coord_epoch_c EpT = MccCelestialCoordEpoch>
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requires(std::is_arithmetic_v<CxT> && std::is_arithmetic_v<CyT>)
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MccNamedCoordPair(CxT const& x, CyT const& y, EpT const& epoch = EpT::now())
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@ -166,7 +171,7 @@ struct MccSkyRADEC_ICRS : MccNamedCoordPair<MccAngleRA_ICRS, MccAngleDEC_ICRS> {
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MccSkyRADEC_ICRS(MccAngle const& x, MccAngle const& y) : MccSkyRADEC_ICRS((double)x, (double)y) {}
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// ignore epoch setting (it is always J2000.0)
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void setEpoch(mcc_coord_epoch_c auto const& ep)
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void setEpoch(mcc_coord_epoch_c auto const&)
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{
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static_assert(false, "CANNOT SET EPOCH FOR ICRS-KIND COORDINATE PAIR!!!");
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}
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@ -403,33 +408,33 @@ protected:
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return;
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} else { // from ICRS to apparent or observed
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if constexpr (mccIsAppCoordPairKind<PT::pairKind>) {
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ccte_err = cctEngine.icrsToApp(_x, _y, cpair.epoch(), &ra, &dec, &ha, &az, &zd);
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} else if constexpr (mccIsObsCoordPairKind<PT::pairKind>) {
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ccte_err = cctEngine.icrsToObs(_x, _y, cpair.epoch(), &ra, &dec, &ha, &az, &zd);
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} else {
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static_assert(true, "UNSUPPORTED SKY POINT TRANSFORMATION!");
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}
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// if constexpr (mccIsAppCoordPairKind<PT::pairKind>) {
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// ccte_err = cctEngine.icrsToApp(_x, _y, cpair.epoch(), &ra, &dec, &ha, &az, &zd);
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// } else if constexpr (mccIsObsCoordPairKind<PT::pairKind>) {
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// ccte_err = cctEngine.icrsToObs(_x, _y, cpair.epoch(), &ra, &dec, &ha, &az, &zd);
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// } else {
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// static_assert(true, "UNSUPPORTED SKY POINT TRANSFORMATION!");
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// }
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if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_RADEC_APP ||
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PT::pairKind == MccCoordPairKind::COORDS_KIND_RADEC_OBS) {
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cpair.setX(ra);
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cpair.setY(dec);
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} else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_HADEC_APP ||
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PT::pairKind == MccCoordPairKind::COORDS_KIND_HADEC_OBS) {
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cpair.setX(ha);
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cpair.setY(dec);
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} else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZZD) {
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cpair.setX(az);
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cpair.setY(zd);
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} else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZALT) {
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cpair.setX(az);
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cpair.setY(half_pi - zd);
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} else {
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static_assert(true, "UNSUPPORTED SKY POINT TRANSFORMATION!");
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}
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// if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_RADEC_APP ||
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// PT::pairKind == MccCoordPairKind::COORDS_KIND_RADEC_OBS) {
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// cpair.setX(ra);
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// cpair.setY(dec);
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// } else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_HADEC_APP ||
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// PT::pairKind == MccCoordPairKind::COORDS_KIND_HADEC_OBS) {
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// cpair.setX(ha);
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// cpair.setY(dec);
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// } else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZZD) {
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// cpair.setX(az);
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// cpair.setY(zd);
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// } else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZALT) {
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// cpair.setX(az);
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// cpair.setY(half_pi - zd);
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// } else {
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// static_assert(true, "UNSUPPORTED SKY POINT TRANSFORMATION!");
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// }
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return;
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// return;
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}
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}
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@ -476,11 +481,17 @@ protected:
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// here, the input coordinates and stored one are at the same epoch
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ccte_err = cctEngine.equationOrigins(cpair.MJD(), &eo);
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ccte_err = cctEngine.equationOrigins(cpair.epoch(), &eo);
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if (ccte_err) {
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return;
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}
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ccte_err = cctEngine.apparentSideralTime(cpair.epoch(), &lst, true);
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if (ccte_err) {
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return;
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}
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if (pkind == MccCoordPairKind::COORDS_KIND_RADEC_APP || pkind == MccCoordPairKind::COORDS_KIND_RADEC_OBS) {
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ra = _x;
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dec = _y;
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@ -494,16 +505,43 @@ protected:
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} else if (pkind == MccCoordPairKind::COORDS_KIND_AZALT) {
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az = _x;
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alt = _y;
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} else if (pkind == MccCoordPairKind::COORDS_KIND_RADEC_ICRS) {
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ra_icrs = _x;
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dec_icrs = _y;
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} else { // unsupported transformation!!!
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return;
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}
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// else if (pkind == MccCoordPairKind::COORDS_KIND_RADEC_ICRS) {
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// ra_icrs = _x;
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// dec_icrs = _y;
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// } else { // unsupported transformation!!!
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// return;
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// }
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// coordinate transformation lambda (possibly recursive!!!)
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auto comp_func = [&, this](this auto&& self, MccCoordPairKind cp_kind) -> void {
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if (cp_kind == MccCoordPairKind::COORDS_KIND_AZALT) {
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auto comp_func = [&](this auto&& self, MccCoordPairKind cp_kind) -> void {
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if (cp_kind == MccCoordPairKind::COORDS_KIND_RADEC_ICRS) {
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if constexpr (mccIsAppCoordPairKind<PT::pairKind>) {
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ccte_err = cctEngine.icrsToApp(ra_icrs, dec_icrs, cpair.epoch(), &ra, &dec, &ha, &az, &zd);
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} else if constexpr (mccIsObsCoordPairKind<PT::pairKind>) {
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ccte_err = cctEngine.icrsToObs(ra_icrs, dec_icrs, cpair.epoch(), &ra, &dec, &ha, &az, &zd);
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} else {
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static_assert(true, "UNSUPPORTED SKY POINT TRANSFORMATION!");
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}
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if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_RADEC_APP ||
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PT::pairKind == MccCoordPairKind::COORDS_KIND_RADEC_OBS) {
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cpair.setX(ra);
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cpair.setY(dec);
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} else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_HADEC_APP ||
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PT::pairKind == MccCoordPairKind::COORDS_KIND_HADEC_OBS) {
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cpair.setX(ha);
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cpair.setY(dec);
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} else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZZD) {
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cpair.setX(az);
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cpair.setY(zd);
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} else if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZALT) {
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cpair.setX(az);
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cpair.setY(half_pi - zd);
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} else {
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static_assert(true, "UNSUPPORTED SKY POINT TRANSFORMATION!");
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}
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} else if (cp_kind == MccCoordPairKind::COORDS_KIND_AZALT) {
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if constexpr (PT::pairKind == MccCoordPairKind::COORDS_KIND_AZZD) {
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zd = half_pi - alt;
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cpair.setX(az);
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@ -23,15 +23,23 @@ int main()
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skypt_t::cctEngine.setStateERFA(saoras);
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skypt_t pt;
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MccSkyRADEC_ICRS icrs(0.0, 0.0);
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MccSkyRADEC_ICRS icrs(0.0, 30.0_degs);
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pt = icrs;
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MccSkyRADEC_OBS radec_obs{0.0, 0.0};
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MccSkyRADEC_APP radec_app;
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MccSkyAZALT azalt{0, 0};
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MccSkyAZZD azzd{0, 0};
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MccSkyHADEC_OBS hadec_obs;
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MccAngle eo, lst;
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pt.to(radec_obs, azalt, azzd);
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skypt_t::cctEngine.equationOrigins(radec_obs.epoch(), &eo);
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skypt_t::cctEngine.apparentSideralTime(radec_obs.epoch(), &lst, true);
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std::cout << "EO = " << eo.sexagesimal(true) << "\n";
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std::cout << "LST = " << lst.sexagesimal(true) << "\n\n";
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pt.to(radec_obs, azalt, azzd, radec_app);
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std::cout << "FROM ICRS TO OBSERVED:\n";
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std::cout << "RA_ICRS = " << icrs.x().sexagesimal(true) << "\n";
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@ -42,11 +50,13 @@ int main()
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std::cout << "AZ = " << azalt.x().sexagesimal() << "\n";
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std::cout << "ALT = " << azalt.y().sexagesimal() << "\n";
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std::cout << "ZD = " << azzd.y().sexagesimal() << "\n";
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std::cout << "RA_APP = " << radec_app.x().sexagesimal(true) << "\n";
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std::cout << "DEC_APP = " << radec_app.y().sexagesimal() << "\n";
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// radec_obs = {10.2387983_degs, "43:21:34.5465"_dms};
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pt = radec_obs;
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pt.to(icrs);
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pt.to(icrs, azzd, hadec_obs);
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std::cout << "\n\nFROM OBSERVED TO ICRS:\n";
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std::cout << "OBS COORD EPOCH: " << radec_obs.epoch().UTC() << "\n";
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@ -55,11 +65,11 @@ int main()
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std::cout << "RA_ICRS = " << icrs.x().sexagesimal(true) << "\n";
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std::cout << "DEC_ICRS = " << icrs.y().sexagesimal() << "\n";
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pt.to(azzd);
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std::cout << "\n\nFROM OBSERVED TO OBSERVED:\n";
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std::cout << "OBS COORD EPOCH: " << radec_obs.epoch().UTC() << "\n";
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std::cout << "RA_OBS = " << radec_obs.x().sexagesimal(true) << "\n";
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std::cout << "DEC_OBS = " << radec_obs.y().sexagesimal() << "\n";
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std::cout << "HA_OBS = " << hadec_obs.x().sexagesimal(true) << "\n";
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std::cout << "AZ = " << azzd.x().sexagesimal() << "\n";
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std::cout << "ZD = " << azzd.y().sexagesimal() << "\n";
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