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This commit is contained in:
Timur A. Fatkhullin
2025-07-23 01:25:49 +03:00
parent b0421972d1
commit 14f3bb7a83
4 changed files with 429 additions and 2 deletions
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60
cxx/mcc_mount_astro_erfa.h
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@@ -21,6 +21,7 @@ enum class MccMountAstromEngineERFAErrorCode : int {
ERROR_INVALID_INPUT_ARG,
ERROR_JULDATE_INVALID_YEAR,
ERROR_JULDATE_INVALID_MONTH,
ERROR_UNSUPPORTED_COORD_PAIR,
ERROR_BULLETINA_OUT_OF_RANGE,
ERROR_LEAPSECONDS_OUT_OF_RANGE,
ERROR_DUBIOUS_YEAR,
@@ -75,6 +76,8 @@ struct MccMountAstromEngineERFACategory : public std::error_category {
return "invalid year number";
case MccMountAstromEngineERFAErrorCode::ERROR_JULDATE_INVALID_MONTH:
return "invalid month number";
case MccMountAstromEngineERFAErrorCode::ERROR_UNSUPPORTED_COORD_PAIR:
return "unsupported coordinate pair";
case MccMountAstromEngineERFAErrorCode::ERROR_BULLETINA_OUT_OF_RANGE:
return "time point is out of range";
case MccMountAstromEngineERFAErrorCode::ERROR_LEAPSECONDS_OUT_OF_RANGE:
@@ -449,6 +452,63 @@ public:
}
error_t obs2icrs(MccCoordPairKind coord_kind, coord_t x, coord_t y, juldate_t juldate, coord_t ra, coord_t dec)
{
std::lock_guard lock{_stateMutex};
auto dut1 = _currentState._bulletinA.DUT1(juldate.mjd);
if (!dut1.has_value()) {
return MccMountAstromEngineERFAErrorCode::ERROR_BULLETINA_OUT_OF_RANGE;
}
auto pol_pos = _currentState._bulletinA.polarCoords(juldate.mjd);
if (!pol_pos.has_value()) {
return MccMountAstromEngineERFAErrorCode::ERROR_BULLETINA_OUT_OF_RANGE;
}
const auto arcsec2rad = std::numbers::pi / 180 / 3600;
pol_pos->x *= arcsec2rad;
pol_pos->y *= arcsec2rad;
std::string type;
switch (coord_kind) {
case mcc::MccCoordPairKind::COORDS_KIND_AZZD:
type = "A";
break;
case mcc::MccCoordPairKind::COORDS_KIND_AZALT:
y = std::numbers::pi / 2.0 - y; // altitude to zenithal distance
type = "A";
break;
case mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP:
type = "H";
break;
case mcc::MccCoordPairKind::COORDS_KIND_RADEC_APP:
type = "R";
break;
default:
return MccMountAstromEngineERFAErrorCode::ERROR_UNSUPPORTED_COORD_PAIR;
}
double ra_icrs, dec_icrs;
int ret = eraAtoc13(type.c_str(), x, y, juldate.MJD0, juldate.mjd, dut1->count(), _currentState.lon,
_currentState.lat, _currentState.elev, pol_pos->x, pol_pos->y, _currentState.meteo.pressure,
_currentState.meteo.temperature, _currentState.meteo.humidity, _currentState.wavelength,
&ra_icrs, &dec_icrs);
if (ret == 1) {
return MccMountAstromEngineERFAErrorCode::ERROR_DUBIOUS_YEAR;
} else if (ret == -1) {
return MccMountAstromEngineERFAErrorCode::ERROR_UNACCEPTABLE_DATE;
}
ra = ra_icrs;
dec = dec_icrs;
return MccMountAstromEngineERFAErrorCode::ERROR_OK;
}
error_t hadec2azalt(coord_t ha, coord_t dec, coord_t& az, coord_t& alt)
{
std::lock_guard lock{_stateMutex};