Class TheSky

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Window
                           |
                           +----java.awt.Frame
                                   |
                                   +----TheSky

public class TheSky

extends Frame

Here is what the controls are like:

Important features:

• [6] The "Redraw" button. Click if you change the epoc, HA/DEC range, date, or time to see the change.
• [7] The "Reload" button. Reloads the candidates from the database.
• [14] The "Default Range" button. Click to rest the range to the default values. Also seems to restore control when the Sky canvas goes non-responsive.
• [21] The "Now" button. Sets the date and time to the current values and redraws.
• [22] The "location" Choice. Choose which site you wish the Sky to reflect.
• [23] The "Time Zone" Choice. Used in conjunction with the date and time fields.

Helpful features:

• [0] Left clicking and dragging on the Sky will allow you to create a box to quickly zoom in. Execute the zoom by middle clicking (or alt + left mouse).
• [0,16,17] Right clicking and/or dragging will show a box representing the telescopes field-of-view with the central RA and DEC displayed at the top. The field size can be set throught the "field width" and "field height" TextFields.
• [2] The "HA --> RA" button will toggel the x-axis labels between hour angle and right ascention (NOTE: the "Min HA" and "Max HA" fields always represent hour angle.
• [0,18] If you zoom in on a standard star field, all of the standarts of that field will be shown. By right clicking, you can see where a good spot to point the telescope is in order to get several standards. Color and magnitude information about the standards in the field box can be obtained by clicking on "Show Field Info"
• [13] The "2x" button will zoom out to twice the current range.

Other features:

• [1] Set the "eqnx" field to the epoc of you choice. Valid values are floats like 2000.0 or 1999.5
• [3] The airmass lines can be toggled on/off with the "Air Mass Lines" button.
• [4] The sun and Moon can be toggled on/off with the Sun/Moon button.
• [5] The Standards button toggles the displaying of the Landolt standards on/off.
• [8] The "cancel" button closes the window (WhatsUp use only).
• [9,10,11,12] The Min/Max HA/DEC fields can be used to specify the range of the Sky (click "redraw" when set).
• [15] The "priority >=" field determines which candidates are displayed (click "redraw" if changed).
• [19,20] The date and time TextFields allow the user to specify what time to draw the sky for.

The information below pertains to the java sorce code for the applet only and is not vital for its use.

bfont

cbAirmass

cbDoRA

cbStands

cbSunMoon

clocation

ctimeZone

dateDF

defaultRange

doubleRange

elev

fieldInfo

jd

lat

longit

now

pbot

pbotCheck

pbotDate

pbotField

pbotRange

ptop

redraw

reload

sfont

showFieldInfo

sky

tdate

teqnx

tfieldHeight

tfieldWidth

timeDF

tmaxDEC

tmaxHA

tminDEC

tminHA

tminOAP

ttime

tz

url

uw

wd

TheSky(WhatData)

addCancelButton()

getMaxDEC()

reads the maximum DEC from the TextField

getMaxHA()

reads the maximum HA from the TextField

getMinDEC()

reads the minimum DEC from the TextField

getMinHA()

reads the minimum HA from the TextField

getTime()

main(String[])

roundToSigFigs(double, int)

rounds of a number to a given number of places

setNewLocation()

setTimeToNow()

  public final static String url

  public static DateFormat dateDF

  public static DateFormat timeDF

  public Font bfont

  public Font sfont

  protected TheSky. Sky sky

  protected Checkbox cbAirmass

  protected Checkbox cbSunMoon

  protected Checkbox cbStands

  protected Checkbox cbDoRA

  protected Button redraw

  protected Button doubleRange

  protected Button defaultRange

  protected Button now

  protected Button reload

  protected TextField tdate

  protected TextField ttime

  protected TextField tminHA

  protected TextField tminDEC

  protected TextField tmaxHA

  protected TextField tmaxDEC

  protected Choice clocation

  protected Choice ctimeZone

  protected Panel ptop

  protected Panel pbot

  protected Panel pbotCheck

  protected Panel pbotRange

  protected Panel pbotField

  protected Panel pbotDate

  protected JulianDate jd

  protected TimeZone tz

  public WhatData wd

  public Sixty lat

  public Sixty longit

  public double elev

  public TextField tminOAP

  public TextField tfieldWidth

  public TextField tfieldHeight

  public TextField teqnx

  public Button showFieldInfo

  public TheSky. FieldInfo fieldInfo

  public UserWait uw

  public TheSky(WhatData wd2)

  public static void main(String args[])

  public void addCancelButton()

  public void setNewLocation()

  protected void setTimeToNow()

  protected JulianDate getTime()

  public double getMinHA()

reads the minimum HA from the TextField

  public double getMaxHA()

reads the maximum HA from the TextField

  public double getMinDEC()

reads the minimum DEC from the TextField

  public double getMaxDEC()

reads the maximum DEC from the TextField

  public static double roundToSigFigs(double d,
                                      int sigFigs)

rounds of a number to a given number of places