Sky_Times Struct Reference

This structure contains the continuously varying time (and earth rotation) data, in various forms that we will find useful. More...

Data Fields
double	mjdUtc
	Modified Julian Date (= JD - 2 400 000.5), UTC.
double	j2kUT1_d
	days since J2000.0, UT1 timescale [Du]
double	j2kTT_d
	days since J2000.0, TT timescale [D]
double	j2kTT_cy
	Julian centuries since J2000.0, TT timescale [T].
double	era_rad
	Earth Rotation Angle (radian) [θ].

Detailed Description

This structure contains the continuously varying time (and earth rotation) data, in various forms that we will find useful.

Do not modify any of these fields directly - use the sky_updateTimes() function to update them.

But you will almost certainly want to read the values of any of the individual fields, and/or pass them to functions. In particular, the field j2kTT_cy is passed to many routines.

Notation used in section B of the Astronomical Almanac 2007 is shown in [square brackets].

Examples

demo4_multiple_sites.c.

Definition at line 184 of file sky.h.

---

The documentation for this struct was generated from the following file:

• sky.h