Struct TDB 

pub struct TDB;

Barycentric Dynamical Time.

TDB differs from TT by a periodic correction of ≈1.7 ms amplitude (Fairhead & Bretagnon 1990). This implementation applies the four largest periodic terms automatically in to_jd_tt / from_jd_tt, achieving accuracy better than 30 μs for dates within ±10 000 years of J2000.

References

• Fairhead & Bretagnon (1990), A&A 229, 240
• USNO Circular 179, eq. 2.6
• IAU 2006 Resolution B3

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 Debug for TDB

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

Formats the value using the given formatter.

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 TimeScale for TDB

const LABEL: &'static str = "TDB"

Display label used by Time formatting.

fn to_jd_tt(tdb_value: Days) -> Days

Convert a quantity in this scale’s native unit to an absolute JD(TT).

fn from_jd_tt(jd_tt: Days) -> Days

Convert an absolute JD(TT) back to this scale’s native quantity.

impl Copy for TDB

impl StructuralPartialEq for TDB