Struct TDB 

pub struct TDB(/* private fields */);

Barycentric Dynamical Time.

A time scale for solar system barycentric ephemerides. Wraps a split Julian Date for high-precision arithmetic. TDB tracks TT to within ~2 ms over centuries.

Implementations

impl TDB

pub fn new(seconds: i64, nanos: u32) -> Self

Creates TDB from Unix timestamp components.

Converts seconds and nanoseconds since 1970-01-01 to TDB Julian Date.

pub fn from_julian_date(jd: JulianDate) -> Self

Creates TDB from a Julian Date.

pub fn j2000() -> Self

Returns TDB at the J2000.0 epoch (2000-01-01T12:00:00 TDB).

pub fn to_julian_date(&self) -> JulianDate

Returns the underlying Julian Date.

pub fn add_seconds(&self, seconds: f64) -> Self

Adds seconds to this TDB instant, returning a new TDB.

pub fn add_days(&self, days: f64) -> Self

Adds days to this TDB instant, returning a new TDB.

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 Display for TDB

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

Formats the value using the given formatter.

impl From<JulianDate> for TDB

Conversion from JulianDate. No transformation applied.

fn from(jd: JulianDate) -> Self

Converts to this type from the input type.

impl FromStr for TDB

Parses ISO 8601 string as TDB.

The string is interpreted directly as TDB without any scale conversion.

type Err = TimeError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> TimeResult<Self>

Parses a string s to return a value of this type.

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 TdbToTcb for TDB

fn tdb_to_tcb(&self) -> TimeResult<TCB>

Convert TDB to TCB by applying the inverse L_B rate correction.

Uses the rate ratio L_B / (1 - L_B) to properly invert the scaling. First removes the TDB_0 offset, then applies the inverse rate correction.

Applies the correction to the smaller-magnitude JD component for precision.

impl ToTDB for TDB

fn to_tdb_greenwich(&self) -> TimeResult<TDB>

Convert to TDB using Greenwich Observatory as reference.

fn to_tdb_with_location(&self, _location: &Location) -> TimeResult<TDB>

Convert to TDB using the specified observer location.

fn to_tdb_with_location_and_ut1_offset( &self, _location: &Location, _ut1_offset_seconds: f64, ) -> TimeResult<TDB>

Convert to TDB with location and UT1-UTC offset for maximum precision.

fn to_tdb_with_offset(&self, _dtr_seconds: f64) -> TimeResult<TDB>

Convert to TDB using a pre-computed offset (TDB-TT) in seconds.

impl ToTT for TDB

fn to_tt(&self) -> TimeResult<TT>

Convert to Terrestrial Time.

impl ToTTFromTDB for TDB

fn to_tt_greenwich(&self) -> TimeResult<TT>

Convert to TT using Greenwich Observatory as reference.

fn to_tt_with_location(&self, location: &Location) -> TimeResult<TT>

Convert to TT using the specified observer location.

fn to_tt_with_location_and_ut1_offset( &self, location: &Location, ut1_offset_seconds: f64, ) -> TimeResult<TT>

Convert to TT with location and UT1-UTC offset for maximum precision.

fn to_tt_with_offset(&self, dtr_seconds: f64) -> TimeResult<TT>

Convert to TT using a pre-computed offset (TDB-TT) in seconds.

impl Copy for TDB

impl StructuralPartialEq for TDB