stk 坐标系_STK学习-坐标系

第一次写知乎文章，主要目的是为了记录工作学习中遇到的问题和解决过程，如果能帮到大家也是好的，希望大家多多指正。

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今天使用STK时，遇到坐标系之间转换的问题，为了以后方便，这里把STK中的坐标系进行列举并注释。

1

Inertial

惯性坐标系

A fixed constant rotation from J2000, where the rotation depends on the central body, as described in Inertial Coordinate Systems.

自J2000系的恒定旋转坐标系，旋转随中心天体而定，被描述成惯性坐标系统。

2

Fixed

固连坐标系

X is fixed at 0 deg longitude, Y is fixed at 90 deg longitude, and Z is directed toward the north pole.

X轴固定在0°经线，Y轴固定在90°经线，Z轴与X、Y轴呈右手定则关系，指向北极点。

3

J2000

J2000系

X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth on 1 Jan 2000 at 12:00:00 TDB, which corresponds to JD 2451545.0 TDB.

X轴指向2000-01-01 12:00:00 TDB(JD 2451545.0 TDB)平春分点，Z轴沿着此时的地球平自转轴。

4

B1950

B1950系

X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth at the beginning of the Besselian year1950 (when the longitude of the mean Sun is 280.0 deg measured from the mean equinox) and corresponds to 31 December 1949 22:09:07.2 or JD 2433282.423.

X 轴指向贝塞尔年起点2950年(此时平太阳从平春分点起算的经度为280°，相当于1949年12月31日22:09:07.2相当于JD2433282.423)的平春分点，Z轴沿着此时的平地球自转轴。

5

TEME of Epoch

坐标系历元_轨道坐标系

X points toward the mean vernal equinox and Z points along the true rotation axis of the Earth at the Coord Epoch.

X轴指向z坐标系历元时刻的平春分点在真赤道上的投影，Z轴沿着此时的真地球自转轴。

6

TEME of Date

轨道历元_轨道坐标系

X points toward the mean vernal equinox and Z points along the true rotation axis of the Earth at the Orbit Epoch.

X轴指向轨道历元时刻的平春分点在真赤道上的投影，Z轴沿着此时的真地球自转轴。

7

Mean of Epoch

坐标系历元_瞬时平赤道地心系

X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth at the Coord Epoch.

X轴指向坐标系历元时刻的平春分点，Z轴沿着此时的平地球自转轴。

8

Mean of Date

轨道历元_瞬时平赤道地心系

X points toward the mean vernal equinox and Z points along the mean rotation axis of the Earth at the Orbit Epoch.

X轴指向轨道历元时刻的平春分点，Z轴沿着此时的平地球自转轴。

9

True of Epoch

坐标系历元_瞬时真赤道地心系

X points toward the true vernal equinox and Z points along the true rotation axis of the Earth at the Coord Epoch.

X轴指向坐标系历元时刻的真春分点，Z轴沿着此时的真地球自转轴。

10

True of Data

轨道历元_瞬时真赤道地心系

X points toward the true vernal equinox and Z points along the true rotation axis of the Earth at the Orbit Epoch.

X轴指向轨道历元时刻的真春分点，Z轴沿着此时的真地球自转轴。

11

Alignment at Epoch

坐标系历元_第二瞬时真赤道地心系

Defines an inertial system coincident with ECF at the Coord Epoch. Often used to specify launch trajectories.

定义在坐标系历元时刻的ECF惯性坐标系，经常用来描述发射轨迹。X轴指向坐标系历元时刻的格林尼治子午线与瞬时真赤道平面的交点。