Struct hifitime::julian::ModifiedJulian

pub struct ModifiedJulian {
    pub days: f64,
}

ModifiedJulian handles the Modified Julian Days as explained here.

Fields

days: f64

Implementations

impl ModifiedJulian

pub fn j2000() -> ModifiedJulian

pub fn julian_days(self) -> f64

julian_days returns the true Julian days from epoch 01 Jan -4713, 12:00 as explained in “Fundamentals of astrodynamics and applications”, Vallado et al. 4th edition, page 182, and on Wikipedia.

pub fn centuries_since_j2000(self) -> f64

Returns the centuries since J2000. This number is often referred to as JD_tt.

Trait Implementations

impl Clone for ModifiedJulian

fn clone(&self) -> ModifiedJulian

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ModifiedJulian

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

Formats the value using the given formatter.

impl Display for ModifiedJulian

The formatter will show six digits of precision. This allows for a resolution of about 0.864 seconds.

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

Formats the value using the given formatter.

impl PartialEq<ModifiedJulian> for ModifiedJulian

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd<ModifiedJulian> for ModifiedJulian

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl TimeSystem for ModifiedJulian

fn from_instant(instant: Instant) -> ModifiedJulian

from_instant converts an Instant to a ModifiedJulian as detailed in Vallado et al. 4th edition, page 182.

Leap second source contains information pertinent to the NTP time definition, whose epoch is twelve hours ahead of the Julian Day. Here is the relevant quote:

The NTP timestamps are in units of seconds since the NTP epoch, which is 1 January 1900, 00:00:00. The Modified Julian Day number corresponding to the NTP time stamp, X, can be computed as

X/86400 + 15020

where the first term converts seconds to days and the second term adds the MJD corresponding to the time origin defined above. The integer portion of the result is the integer MJD for that day, and any remainder is the time of day, expressed as the fraction of the day since 0 hours UTC. The conversion from day fraction to seconds or to hours, minutes, and seconds may involve rounding or truncation, depending on the method used in the computation.

fn into_instant(self) -> Instant

into_instant returns an Instant from the ModifiedJulian.

impl Copy for ModifiedJulian

impl StructuralPartialEq for ModifiedJulian