Emapwin simulate the solar eclipse from 3000BC to 3000AD.
The Emapwin Eclipse simulation software has the following main features.
1) Display of the Eclipse Map
The Emapwin calculates and draws the following lines on the map.
a) Curve of the central line of the umbra
b) Curve of the northern and southern limit of the umbra
c) Curve of the northern and southern limit of the penumbra
d) Curve of the rising and setting
e) Curve of the maximum eclipse at sunrise and sunset
f) Curve of the maximum eclipse
g) Curve of the equal magnitude
2) Display of the table of the Central line
The Emapwin makes a table indicates the northern, central and southern
limit of the umbra by the parameter of the longitude. So it is easy to
draw the line on the map.
3) Display of the Local Circumstance
The Emapwin calculate the local circumstance such as maximum magnitude,
time , altitude of the sun and direction at the given place. The Emapwin
also simulate and display the eclipse at the given place.
4) Display of the Sky at Max. Magnitude
The Emapwin display the Sky view at maximum magnitude if that point is in
the area of the total eclipse.
The new version can display the map with the CIA world databak II data
which is placed in the following ftp site
2) City Name
The city name will be displayed on the map when the enlargement magnitude
is more than 20. The geographical data is supplied by Mr. Sheridan
Williams who is author of the "UK solar eclipses from yer 1 to 3,000".
The city name defined in the "location.new" file will be displayed when
the enlargement magnitude is more than 10.
3)Mercator map method
The Mercator map can be displayed by select in the "Display menu".
1) Bessel elements
The Bessel elements are recalculated based on the DE406 JPL Ephemeredes.
2) Delta T
The delta T is based on"HISTRICAL ECLIPSES AND EARTH'S ROTATION" by
3) The Sky view
If the observation point is within the total eclipse area, the Sky view at
The Maximum eclipse can be displayed.
4) Saros number
The minus saros number is applied for the ancient eclipse based on the
"CANON OF SOLAR ECLIPSES(-2003 to 2526)" by H.MUCKE and J.MEEUS
Local Circumstances at Turkey Sivas(39d45'N 37d02'E) for 1999 Aug. 11 Eclipse
*NASA:NASA Reference Publication 1398
The Emapwin calculates based on the Bessel elements attached with the
software. In the basic release, the Bessel elements for all eclipses from
year 1951 to 2200 are provided with some famous eclipse in the ancient time.
The Bessel elements for the eclipse from 3000BC to 3000AD can be downloaded
*Eclipse data for August 11, 1999 courtesy of Fred Espenak - NASA/Goddard Space Flight Center.
The following functions are not supported by this release.
It will be supported in the future.
- Print Function
- File Save function
|April 15, 2000|
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Copyright(C) 2000 Shinobu Takesako