SolarTermUtil class

Constructors

SolarTermUtil.new()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Properties

ANGLE_PER_RAD → double

每弧度的角度数

final

DTS → List<double>

世界时与原子时之差计算表

final

E10 → List<double>

final

E11 → List<double>

final

E12 → List<double>

final

E13 → List<double>

final

E14 → List<double>

final

E15 → List<double>

final

E20 → List<double>

final

E21 → List<double>

final

E30 → List<double>

final

E31 → List<double>

final

E32 → List<double>

final

E33 → List<double>

final

EnnT ↔ double

getter/setter pair

GXC_E → List<double>

离心率

final

GXC_K → double

光行差常数

final

GXC_L → List<double>

太平黄经

final

GXC_P → List<double>

近点

final

H_C_ANGLE_TABLE → List<double>

黄赤交角系数表

final

J2000 → double

日历计算

final

M10 → List<double>

final

M11 → List<double>

final

M12 → List<double>

final

M1n → List<double>

final

M20 → List<double>

final

M21 → List<double>

final

M30 → List<double>

final

M31 → List<double>

final

MnnT ↔ double

getter/setter pair

nutB → List<double>

章动计算

final

SECOND_PER_RAD → double

每弧度的角秒数

final

SOLAR_TERMS ↔ List<String>

24节气

getter/setter pair

Static Methods

addGxc(double t, List<double> zb) → void

恒星周年光行差计算(黄道坐标中)

angleDiff(int lx, double time, double angle) → double

地心坐标中的日月位置计算

atomTimeDiff(double julian) → double

传入儒略日(J2000起算),计算UTC与原子时的差(单位:日)

doubleFloor(double v) → double

向下取整

earCal(double jd) → List<double>

返回地球位置,日心Date黄道分点坐标

Enn(List<double> F) → double

计算E10,E11,E20等,即:某一组周期项或泊松项算出,计算前先设置EnnT时间

getSolarTerms(int year) → List<String>

获得某一年24节气

getSolarTermsNextOffset(int year) → List<String>

要获得2018年24节气需要传入2017年

getSolarTermsPreOffset(int year) → List<String>

要获得2018年24节气需要传入2017年

getTimeFromAngle(double t1, double angle, int lx) → double

已知位置反求时间,对于节气计算,应满足t在t1到t1+360天之间,对于Y年第n个节气(n=0是春分),t1可取值Y365.2422+n15.2, 对于朔望计算,应满足t在t1到t1+25天之间,在此范围之外,求右边的根

Mnn(List<double> F) → double

计算M10,M11,M20等,计算前先设置MnnT时间

moonCoord(double julian) → List<double>

返回月球位置,返回地心Date黄道坐标

nutation(double t) → Nutation

计算黄经章动及交角章动

precession(double jd, List<double> zb) → void

补岁差

rad2mrad(double v) → double

对超过0-2PI的角度转为0-2PI

setFromJulian(double jd, bool UTC) → Time

儒略日数转公历,UTC=1表示目标公历是UTC

toJulian(Time time, bool UTC) → double

公历转儒略日,UTC=1表示原日期是UTC

worldTimeDiff(double year) → double

计算世界时与原子时之差,传入年