TrackingSchedule Class Reference

Provides the schedule for tracking a point across the celestial sphere, typically at a speed of one sidereal day per solar day. More...

#include <state.h>

Inheritance diagram for TrackingSchedule:

Public Member Functions
	TrackingSchedule (const Quaternion &axis, double hdot, Position observatory)
	Initialise a schedule which tracks a point in a rotation about a given axis. More...
ms_t	step (double current_phi, double current_theta, ms_t t)
	Update the schedule with the current position of the system. More...
double	speed (void)
	Returns the rotation speed of the schedule, in rad/s.
float	limit_tracking (Quaternion &actual, const TelescopeController *)
	Establish the bounds of the permitted movement of the telescope.
Public Member Functions inherited from Schedule
double	phidot (void) const
	Obtain the suggested azimuthal angular speed. More...
double	thetadot (void) const
	Obtain the suggested altitudinal angular speed. More...

Additional Inherited Members
Protected Attributes inherited from Schedule
double	phidot_
	Suggested rate of change of phi (azimuthal coordinate, rad/s)
double	thetadot_
	Suggested rate of change of theta (altitude coordinate, rad/s). More...

Detailed Description

Provides the schedule for tracking a point across the celestial sphere, typically at a speed of one sidereal day per solar day.

Constructor & Destructor Documentation

TrackingSchedule::TrackingSchedule	(	const Quaternion &	axis,
		double	hdot,
		Position	observatory
	)

Initialise a schedule which tracks a point in a rotation about a given axis.

The result is a rotation expressed in horizontal coordinates. If, however, the observatory position is given as the null position (see Position::get_null()), then we take the axis to be in horizontal coordinates.

Parameters

axis	the axis to be tracked about, in equatorial coordinates
hdot	the angular speed to track at, in radians/sec clockwise about this axis
observatory	the location of the observatory

Member Function Documentation

ms_t TrackingSchedule::step ( double  current_phi, double  current_theta, ms_t  t  )

virtual

Update the schedule with the current position of the system.

Step the schedule to the given time

Parameters

current_phi	the current pointing of the system (azimuth, rad)
current_theta	the current pointing of the system (altitude, rad)
t	the current time

Returns

a new suggested step time, or zero to indicate that we've arrived at a destination, or should otherwise stop

Implements Schedule.

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The documentation for this class was generated from the following files:

• state.h
• state.cpp