Interpolated IERS Earth Orientation Parameter values. More...

#include <tempoch/eop.hpp>

Public Attributes
double	mjd_utc
	UTC MJD of the interpolation result.

std::optional< double >	pm_xp_arcsec
	Polar motion X component (arcseconds). `nullopt` if absent.

std::optional< double >	pm_yp_arcsec
	Polar motion Y component (arcseconds). `nullopt` if absent.

double	ut1_minus_utc
	DUT1 = UT1 − UTC (seconds of time).

std::optional< double >	lod_milliseconds
	Excess length-of-day (milliseconds of time). `nullopt` if absent.

std::optional< double >	dx_milliarcsec
	ΔX celestial-pole offset (milliarcseconds). `nullopt` if absent.

std::optional< double >	dy_milliarcsec
	ΔY celestial-pole offset (milliarcseconds). `nullopt` if absent.

bool	ut1_observed
	True when both bracketing rows carry observed (`I`) data.

Detailed Description

Interpolated IERS Earth Orientation Parameter values.

Mirrors tempoch_eop_values_t with std::optional<double> replacing NaN sentinels and bool replacing the uint8_t flag.

All field units match the upstream IERS finals2000A.all file:

Polar-motion components in arcseconds.
DUT1 (UT1 − UTC) in seconds of time.
Excess length-of-day in milliseconds of time.
Celestial-pole offsets in milliarcseconds.

Definition at line 37 of file eop.hpp.

Member Data Documentation

◆ dx_milliarcsec

std::optional<double> tempoch::EopValues::dx_milliarcsec

ΔX celestial-pole offset (milliarcseconds). nullopt if absent.

Definition at line 49 of file eop.hpp.

◆ dy_milliarcsec

std::optional<double> tempoch::EopValues::dy_milliarcsec

ΔY celestial-pole offset (milliarcseconds). nullopt if absent.

Definition at line 51 of file eop.hpp.

◆ lod_milliseconds

std::optional<double> tempoch::EopValues::lod_milliseconds

Excess length-of-day (milliseconds of time). nullopt if absent.

Definition at line 47 of file eop.hpp.

◆ mjd_utc

double tempoch::EopValues::mjd_utc

UTC MJD of the interpolation result.

Definition at line 39 of file eop.hpp.

Referenced by tempoch::eop_at().

◆ pm_xp_arcsec

std::optional<double> tempoch::EopValues::pm_xp_arcsec

Polar motion X component (arcseconds). nullopt if absent.

Definition at line 41 of file eop.hpp.

◆ pm_yp_arcsec

std::optional<double> tempoch::EopValues::pm_yp_arcsec

Polar motion Y component (arcseconds). nullopt if absent.

Definition at line 43 of file eop.hpp.

◆ ut1_minus_utc

double tempoch::EopValues::ut1_minus_utc

DUT1 = UT1 − UTC (seconds of time).

Definition at line 45 of file eop.hpp.

◆ ut1_observed

bool tempoch::EopValues::ut1_observed

True when both bracketing rows carry observed (I) data.

Definition at line 53 of file eop.hpp.

The documentation for this struct was generated from the following file:

eop.hpp

Public Attributes