Implementation of SAT as thread. More...

#include <carma/control/SubarrayTrackerThread.h>

Public Member Functions
long	getAntennaTrackPeriod () const
	Returns antenna tracker thread period - set during construction. More...

long	getAntennaWeatherPeriod () const
	Returns antenna weather update period - set during construction. More...

double	getAntInterpolationInterval () const
	Returns antenna tracking interpolation interval as a fraction of a day. More...

long	getDelayEngineWeatherPeriod () const
	Returns delay engine weather update period - set during construction. More...

double	getInterpolationInterval () const
	Returns interferometry interpolation interval as a fraction of a day. More...

double	getLastAntUpdate () const

double	getLastIntferUpdate () const

monitor::CarmaMonitorSystem &	getMonitorSystem () const
	Returns internal CARMA Monitor System object. More...

long	getTrackerPeriod () const
	Returns tracker thread period - set during construction. More...

void	operator() ()
	Thread functor method. More...

void	setLastAntUpdate (double mjd)
	Set time of last antenna tracking position update. More...

void	setLastIntferUpdate (double mjd)
	Set time of last interferometry sky position update. More...

	TrackerThread (SubarrayControlImpl &saCI, monitor::CarmaMonitorSystem &carmaMonitor, const unsigned long period=TRACKER_DEFAULT_UPDATE_INTERVAL, const unsigned long antennaWeatherPeriod=TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL, const unsigned long delayEngineWeatherPeriod=TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL, const unsigned long antennaTrackPeriod=TRACKER_DEFAULT_ANTENNA_TRACK_UPDATE_INTERVAL)
	Constructor. More...

void	updateTracking ()
	Calls updateTracking on each antenna, and then calls computeDelay on delay engine. More...

	~TrackerThread ()
	Destructor. More...

Static Public Attributes
static const unsigned long	TRACKER_DEFAULT_ANTENNA_TRACK_UPDATE_INTERVAL = 8 * 60

static const unsigned long	TRACKER_DEFAULT_UPDATE_INTERVAL = 20

static const unsigned long	TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL = 4 * 60

Detailed Description

Implementation of SAT as thread.

See design document for CARMA Control package for details.

Critical method is updateTracking - all the work is done there, invoked periodically by action. Period is deteremined by TRACKER_UPDATE_INTERVAL which is currently set to 20 seconds. The update is synchronized to aboslute ,kd time, an integral number of TRACKER_UPDATE_INTERVALS. The quadratic interpolator will be filled with 3 samples that are -0.5T, +0.5T, and 1.5T from the current time, allowing interpolation from 0T to 1.0T without ever being near the boundary where precision could cause an error.

TrackerThread::updateTracking sends topocentric RA/Dec to antennas for RA/Dec specified sources, and Az/El for Az/El specified targets, in addition to Ut1-Utc corrections. It also sends geocentric Ra/Dec for each antenna) to delay engine for RA/Dec specified sources and Az/El for each antenna to delay engine for Az/El specified targets.

Definition at line 56 of file SubarrayTrackerThread.h.

Constructor & Destructor Documentation

carma::control::SubarrayControlImpl::TrackerThread::TrackerThread	(	SubarrayControlImpl &	saCI,
		monitor::CarmaMonitorSystem &	carmaMonitor,
		const unsigned long	period = `TRACKER_DEFAULT_UPDATE_INTERVAL`,
		const unsigned long	antennaWeatherPeriod = `TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL`,
		const unsigned long	delayEngineWeatherPeriod = `TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL`,
		const unsigned long	antennaTrackPeriod = `TRACKER_DEFAULT_ANTENNA_TRACK_UPDATE_INTERVAL`
	)

explicit

Constructor.

Constructs tracker thread for a set of antennas, a specified delay engine and (possibly) an initial source.

Parameters

carmaMonitor,reference	to full CARMA monitor system - used to read in fresh values from the monitor stream.
period,const	long periodicity of tracker thread firing set to TRACKER_DEFAULT_UPDATE_INTERVAL. Measured in seconds.
antennaWeatherPeriod,const	long periodicity of weather update to antennas, set to TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL. Measured in seconds.
delayEngineWeatherPeriod,const	long periodicity of weather update to delay engine, set to TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL. Measured in seconds.
antennaTrackPeriod,const	long periodicity of tracking update to antennas, set to TRACKER_DEFAULT_ANTENNA_TRACK_UPDATE_INTERVAL. Measured in seconds.

carma::control::SubarrayControlImpl::TrackerThread::~TrackerThread ( )

Destructor.

Member Function Documentation

long carma::control::SubarrayControlImpl::TrackerThread::getAntennaTrackPeriod ( ) const

Returns antenna tracker thread period - set during construction.

Value is returned in seconds.

Returns: const long value of antenna tracking period in seconds.

long carma::control::SubarrayControlImpl::TrackerThread::getAntennaWeatherPeriod ( ) const

Returns antenna weather update period - set during construction.

Value is returned in seconds.

Returns: const long value of antenna weather update period in seconds.

double carma::control::SubarrayControlImpl::TrackerThread::getAntInterpolationInterval ( ) const

Returns antenna tracking interpolation interval as a fraction of a day.

Returns: const double value of antenna interpolation interval, as a fraction of a day.

long carma::control::SubarrayControlImpl::TrackerThread::getDelayEngineWeatherPeriod ( ) const

Returns delay engine weather update period - set during construction.

Value is returned in seconds.

Returns: const long value of delay engine weather update period in seconds.

double carma::control::SubarrayControlImpl::TrackerThread::getInterpolationInterval ( ) const

Returns interferometry interpolation interval as a fraction of a day.

Returns: const double value of interferometry interpolation interval, as a fraction of a day.

double carma::control::SubarrayControlImpl::TrackerThread::getLastAntUpdate ( ) const

Returns: time of last antenna tracking position update as an MJD.

double carma::control::SubarrayControlImpl::TrackerThread::getLastIntferUpdate ( ) const

Returns: The time of last interferometry sky position update, as an MJD

monitor::CarmaMonitorSystem& carma::control::SubarrayControlImpl::TrackerThread::getMonitorSystem ( ) const

Returns internal CARMA Monitor System object.

Returns: monitor::CarmaMonitorSystem object reference

long carma::control::SubarrayControlImpl::TrackerThread::getTrackerPeriod ( ) const

Returns tracker thread period - set during construction.

Value is returned in seconds.

Returns: const long value of thread period in seconds.

void carma::control::SubarrayControlImpl::TrackerThread::operator() ( )

Thread functor method.

To be passed in to boost::thread constructor.

void carma::control::SubarrayControlImpl::TrackerThread::setLastAntUpdate ( double mjd )

Set time of last antenna tracking position update.

Input truncated to align with the effective interval.

Parameters

mjd	The time to set the ant track update to.

void carma::control::SubarrayControlImpl::TrackerThread::setLastIntferUpdate ( double mjd )

Set time of last interferometry sky position update.

Input truncated to align with the effective interval.

Parameters

mjd	The time to set the interferometry update to.

void carma::control::SubarrayControlImpl::TrackerThread::updateTracking ( )

Calls updateTracking on each antenna, and then calls computeDelay on delay engine.

setAntennaLOFreq should already have been called by constructor of SubarrayControlImpl.

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

carma/control/SubarrayTrackerThread.h

Public Member Functions

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation