Struct TDB 

pub struct TDB;

Barycentric Dynamical Time.

Differs from TT by a modeled periodic term using the seven-term Fairhead–Bretagnon truncation from USNO Circular 179.

The built-in approximation is context-free because the model has no runtime-settable parameters, but its advertised high-accuracy regime is finite: the implementation is documented to stay within about 10 µs only over the interval bracketed by TDB_TT_MODEL_HIGH_ACCURACY_START_JD and TDB_TT_MODEL_HIGH_ACCURACY_END_JD (roughly 1600-01-01 to 2200-01-01 TT). Outside that interval conversions remain available, but the crate does not claim microsecond-level scientific accuracy.

Trait Implementations

impl Clone for TDB

fn clone(&self) -> TDB

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl ConversionTarget<TDB> for UT1

type Output = Time<UT1>

fn try_convert(src: Time<TDB>) -> Result<Self::Output, ConversionError>

impl ConversionTarget<UT1> for TDB

type Output = Time<TDB>

fn try_convert(src: Time<UT1>) -> Result<Self::Output, ConversionError>

impl Debug for TDB

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for TDB

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for TDB

fn cmp(&self, other: &TDB) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TDB

fn eq(&self, other: &TDB) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for TDB

fn partial_cmp(&self, other: &TDB) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Scale for TDB

const NAME: &'static str = "TDB"

Display name of the scale. Used by Debug on Time.

impl ContinuousScale for TDB

impl CoordinateScale for TDB

impl Copy for TDB

impl Eq for TDB

impl StructuralPartialEq for TDB