stella.util
Class Tracking

java.lang.Object
  util.CommandLineParser
      astro.RaDeParser
          stella.util.Tracking

public class Tracking
extends RaDeParser

A small class allowing you to read x/y coordinates of a tracking sequence as deduced from a webcam and convert them to x'/y', where the x axis is paralell to azimuth, y axis parallel to altitude. This is done in the following way:

• The user provides geographical location and start time of the observation.
• The user specifies object coordinates either directly or via a SIMBAD-resolvable name.
• The user provides the angle between the x-axis and the tau-direction at the start of the observation, e.g. measured by a drift-scan.
• The user provides the stepping intervall of the observations.
• From the data, the time-dependant rotation angle of the webcam coordinate system to alt/az is calculated, a rotation is done on the x/y in the webcam system and the new data, along with additional information is writtn to a data file.

For detailed usage, issue java stella.util.Tracking without any command line arguments.

Nested Class Summary

Nested classes/interfaces inherited from class util.CommandLineParser

CommandLineParser.Test

Field Summary

private static double	DEFDIAMETER The default telescope size in meter.
private static double	DEFENCODER The default encoder frequency, steps per degree.
private static double	DEFSCALE The default pixel scale, pixels per arc second.
private static double	DEFWIND The default column wind speed in m/s.
static int	DEFX The default x-data column.
static int	DEFY The default x-data column.
private static String	FOOT A footer message.
private static String	SWITCHES The switches for adding properties.

Fields inherited from class astro.RaDeParser

USE

Constructor Summary

Tracking()
Constructs the parser to the sensor tester.

Method Summary

private double[]	determine(double y, double amp, double phase)
static void	main(String[] arg) Parses the command line and prints output to standard out or to a file.
boolean	process(String[] arg) Reads the command line and parses object ra,dec out of it.

Methods inherited from class astro.RaDeParser

getRaDe

Methods inherited from class util.CommandLineParser

getArguments, getCommandLine, getCommands, getRegisteredSwitches, hasAnySwitch, hasSwitch, hasSwitch, haveAllSwitches, parse, printCommandLine, registerLine, registerSwitches, setCommands, staticUsage, usage

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFX

public static final int DEFX

The default x-data column.

See Also:

Constant Field Values

DEFY

public static final int DEFY

The default x-data column.

See Also:

Constant Field Values

DEFWIND

private static final double DEFWIND

The default column wind speed in m/s.

See Also:

Constant Field Values

DEFDIAMETER

private static final double DEFDIAMETER

The default telescope size in meter.

See Also:

Constant Field Values

DEFSCALE

private static final double DEFSCALE

The default pixel scale, pixels per arc second.

See Also:

Constant Field Values

DEFENCODER

private static final double DEFENCODER

The default encoder frequency, steps per degree.

See Also:

Constant Field Values

SWITCHES

private static final String SWITCHES

The switches for adding properties.

See Also:

Constant Field Values

FOOT

private static final String FOOT

A footer message.

See Also:

Constant Field Values

Constructor Detail

Tracking

public Tracking()

Constructs the parser to the sensor tester. All known switches are registered.

Method Detail

process

public boolean process(String[] arg)
                throws ParseException,
                       IOException

Reads the command line and parses object ra,dec out of it. If no time is given, the current time is used. Longitude and latitude default to the values of the Teide observatory.

Returns:

True, if processing was okay.

Throws:

ParseException

IOException

determine

private double[] determine(double y,
                           double amp,
                           double phase)

main

public static void main(String[] arg)
                 throws ParseException,
                        IOException

Parses the command line and prints output to standard out or to a file.

Throws:

ParseException

IOException