Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.mrao.cam.ac.uk/~pjds/ascript/users/inverse.txt Дата изменения: Sat Oct 12 20:06:12 1996 Дата индексирования: Tue Oct 2 10:10:47 2012 Кодировка: Поисковые слова: jupiter

{Clear the screen and display a title}
display_title(+++ Inverse Position Problems +++)

{Set default values for first pass}
if (s1=.)

{First ask for the controlling parameters}
set_string(s1,10)
ask_for_string(Maximum step size [days],s1)
set_maximum_step(s1)

set_string(s1,100)
ask_for_string(Maximum number of steps in the search,s1)
set_number_of_iterations(s1)

set_string(s1,1e-6)
ask_for_string(Tolerance,s1)
set_tolerance(s1)

new_line
write_string(Allowed coordinate types are true, apparent, and topocentric)
new_line
set_string(s1,true)
ask_for_string(Type of coordinates to be used,s1)
set_coordinates_type(s1)
new_line

{Now set the defaults for the find_when command}
set_string(s1,Sun)
set_string(s2,hour angle)
set_string(s3, )
end_if

{Get the first argument}
write_string(Valid first arguments are:)
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write_string(--------------------------)
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new_line
write_string(Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune,)
new_line
write_string(Elliptical, Parabolic, or name of body with current RA and Dec)
new_line
new_line
ask_for_string(First argument [choose one of the above],s1)

{Get coordinates if not a main body: added after printing book!}
if (s1!Sun)
if (s1!Moon)
if (s1!Mercury)
if (s1!Venus)
if (s1!Mars)
if (s1!Jupiter)
if (s1!Saturn)
if (s1!Uranus)
if (s1!Neptune)
if (s1!parabolic)
if (s1!elliptical)
ask_for_coordinates(r)
end_if
end_if
end_if
end_if
end_if
end_if
end_if
end_if
end_if
end_if
end_if

{Get the second argument}
new_line
write_string(Valid second arguments are:)
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write_string(---------------------------)
new_line
new_line
write_string(Hour angle, Right ascension, Declination, Azimuth, Altitude,)
new_line
write_string(Ecliptic longitude, Ecliptic latitude, Galactic longitude,)
new_line
write_string(Galactic latitude, conjunction in el, conjunction in ra,)
new_line
write_string(opposition in el, or opposition in ra)
new_line
new_line
ask_for_string(Second argument [choose one of the above],s2)
new_line

{Discriminate between the two variants of the find_when command}
set_character(c1,A)
if (s2=conjunction in ra)
set_character(c1,B)
end_if
if (s2=conjunction in el)
set_character(c1,B)
end_if
if (s2=opposition in ra)
set_character(c1,B)
end_if
if (s2=opposition in el)
set_character(c1,B)
end_if

{Get the third argument according to find_when variant}
if (c1=A)
ask_for_string(Target value,s3)
end_if
if (c1=B)
ask_for_string(Second object name [Sun/Moon/Venus etc.],s3)
end_if

{Perform the calculation, and display the result}
new_line
find_when(s1,s2,s3)

{Another go?}
new_line
ask_for_repeat