Struct TimeTransforms 

pub struct TimeTransforms;

Time system transformations.

Provides conversions between different astronomical time scales.

Implementations

impl TimeTransforms

pub fn utc_to_tai(utc: &UTC) -> TAI

Convert UTC to TAI.

TAI = UTC + leap_seconds

pub fn tai_to_utc(tai: &TAI) -> UTC

Convert TAI to UTC.

UTC = TAI - leap_seconds

Note: This requires knowing the leap seconds at the TAI time, which technically requires iterating since leap seconds are defined in UTC. We use an approximation that works for normal use cases.

pub fn tai_to_tt(tai: &TAI) -> TT

Convert TAI to TT.

TT = TAI + 32.184 seconds

pub fn tt_to_tai(tt: &TT) -> TAI

Convert TT to TAI.

TAI = TT - 32.184 seconds

pub fn tai_to_gps(tai: &TAI) -> GPS

Convert TAI to GPS time.

GPS = TAI - 19 seconds (offset since GPS epoch)

pub fn gps_to_tai(gps: &GPS) -> TAI

Convert GPS time to TAI.

pub fn utc_to_tt(utc: &UTC) -> TT

Convert UTC directly to TT.

pub fn tt_to_utc(tt: &TT) -> UTC

Convert TT directly to UTC.

pub fn utc_to_gps(utc: &UTC) -> GPS

Convert UTC directly to GPS time.

pub fn gps_to_utc(gps: &GPS) -> UTC

Convert GPS time directly to UTC.

pub fn utc_to_jd(utc: &UTC) -> JulianDate

Convert UTC to Julian Date.

pub fn jd_to_utc(jd: &JulianDate) -> UTC

Convert Julian Date to UTC.

pub fn utc_to_gmst(utc: &UTC) -> GMST

Calculate GMST from UTC time using the IAU 1982 expression.

pub fn jd_to_gmst(jd: &JulianDate) -> GMST

Calculate GMST from Julian Date.

pub fn datetime_to_utc(dt: &DateTime<Utc>) -> UTC

Convert a chrono DateTime<Utc> to UTC.

pub fn utc_to_datetime(utc: &UTC) -> DateTime<Utc>

Convert UTC to a chrono DateTime<Utc>.

pub fn datetime_to_tt(dt: &DateTime<Utc>) -> TT

Convert a chrono DateTime<Utc> directly to TT.

pub fn datetime_to_jd(dt: &DateTime<Utc>) -> JulianDate

Convert a chrono DateTime<Utc> directly to Julian Date.

pub fn julian_centuries_j2000(dt: &DateTime<Utc>) -> f64

Get Julian centuries since J2000.0 for a DateTime.