Struct TCB 

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

Barycentric Coordinate Time.

Wraps a Julian Date interpreted in the TCB time scale. TCB is the proper time for a clock at the solar system barycenter, far from gravitational sources.

Implementations

impl TCB

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

Creates TCB from Unix timestamp components.

Interprets the given seconds and nanoseconds as elapsed since Unix epoch (1970-01-01T00:00:00) in the TCB scale.

pub fn from_julian_date(jd: JulianDate) -> Self

Creates TCB from a Julian Date.

pub fn j2000() -> Self

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

pub fn to_julian_date(&self) -> JulianDate

Returns the underlying Julian Date.

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

Returns a new TCB advanced by the given seconds.

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

Returns a new TCB advanced by the given days.

Trait Implementations

impl Clone for TCB

fn clone(&self) -> TCB

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TCB

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

Formats the value using the given formatter.

impl Display for TCB

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

Formats as “TCB <julian_date>”.

impl From<JulianDate> for TCB

fn from(jd: JulianDate) -> Self

Converts a Julian Date to TCB.

impl FromStr for TCB

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

Parses an ISO 8601 datetime string as TCB.

Accepts formats like “2000-01-01T12:00:00” or “2000-01-01T12:00:00.123”.

type Err = TimeError

The associated error which can be returned from parsing.

impl PartialEq for TCB

fn eq(&self, other: &TCB) -> 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 TcbToTdb for TCB

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

Convert TCB to TDB by removing the L_B rate correction.

The correction is computed as: L_B * (TCB - T0) where T0 is the 1977 epoch. The TDB_0 offset is added to align with TT at the geocenter.

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

impl ToTCB for TCB

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

Identity conversion. Returns self unchanged.

impl ToTCGFromTCB for TCB

fn to_tcg(&self) -> TimeResult<TCG>

Convert TCB to TCG by removing the L_B rate correction.

Computes: TCG = TCB - L_B * (JD_TCB - T0)

The correction is subtracted because TCB runs faster than TCG. At J2000.0, this removes about 11.25 seconds.

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

impl Copy for TCB

impl StructuralPartialEq for TCB