Register

 

 

Sun View Applet
Enable Java to run the applet !

World map copyright by Apple Computer, Inc.

Please read "register.html" to get the full version of this applet and to run it offline.

NEW: You may enter your home location by editing the applet parameters
and change the horizon view image.

Look for details and explanations:

 

twilight

civil twilight:
0 < height < - 6 deg.

nautical twilight:
- 6 deg. < height < - 12 deg.

astronomical twilight:
- 12 deg. < height < - 18 deg.

elevation and azimuth

 

 

the elevation (above horizon)

and azimuth angle of the sun
and it's direction (in brackets)

0 deg. = N, 90 deg. = E
180 deg. = S, 270 deg. = W

 

For a new location:

enter latitude, and press return key
(not enter key !)

- degrees latitude as
a non-negative integer or decimal (0° to 90),
and select "N" or "S"

.

 

.

 

enter longitude, and press return key

- degrees longitude as a
non negative integer or decimal (0 to 180),
and select "E" or "W"

home location

 

 

 

 

Change the parameter values of "location", "latitude" and "longitude" parameters:


enter southern latitude and western longitudes with minus sign !

<APPLET CODE="sunviewxxx.class" archive="Applet/JavaClasses.jar"
NAME="Sun View" WIDTH=600 HEIGHT=490 ALIGN=bottom>

<PARAM name="email" value="replace">
<PARAM name="password" value="12345">
<PARAM NAME=location VALUE=Berlin>
<PARAM NAME=latitude VALUE="52.51">
<PARAM NAME=longitude VALUE="13.41">

</APPLET>

Time Zone Offset

time difference between zone time and Greenwich Time (GMT )

With Netscape 4 and Internet Explorer 4, the applet should display the correct time zone offset.

If necessary, select the correct time zone offset from the menu.

Central European Daylight Time = GMT + 2 hours
Central European Time = GMT + 1 hour
"time zone offset is +2 h" (for Central European Daylight Time)
If necessary, select the correct time zone offset from the menu.

declination and GHA

the declination and Greenwich-Hour-Angle (GHA) are the coordinates (latitude and longitude) of the sun's Geographical Position (GP), where the line from the sun to the center of the earth intersects it's surface.

 

equation of time

The Equation of time is the difference between the time determined by a sundial and the clock time. It is due to the obliquity and the unequal motion of the sun (ellipse).

For detailed information:
Royal Greenwich Observatory Information Leaflet No. 13: `The Equation of Time'

  The data are written to the browser's Java Console !
(and can be printed by Copy and Paste)

 

 


Jürgen Giesen

Email: jgiesen@t-online.de

Home Page: http://www.jgiesen.de

Sun View Applet: http://www.jgiesen.de/SunView/