Fill in the necessary fields and hit "CALCULATE". Coordinates of the second
point are being read independently of those for the first point and can be entered
in a different form. After performing the operation the values from all windows
are stored in memory and data for the following calculation will be read from
the fields with modified values. Second lines (o representation) are
being checked first followed by third lines (radians) and finally the first
lines (h:m:s o ' ").
"-" sign for δ in o ' " forms
(first line) should be placed in the o field, even in case of
-1o < δ < 0o when the
value of degree is equal to "0" so that "-" won't be lost.