Date and Time Display and Entry
WinOrbit permits display and entry of the
Epoch
for orbital element sets or calculation in two formats: astronomical
(numeric) and calendar (date/time). An example of each of the
formats is given below:
Date/Time format: 5/23/80 23:15
Numerical format: 80144.512000053
For the numerical or astronomical format, the date is given to the left of the
decimal point as (year modulo 100)*100 + (day of year), and the time, as a
fractional day, to the right. Thus, 96001.5000000 is noon on 1 January, 1996.
The exact form of the calendar or date/time format is controlled by the
Windows International Control Panel. Refer to the Windows documentation
for your system for available formats.
Date and time can generally be entered in either format. The current
time for calculations is always displayed in the calendar format,
regardless of how it was entered. In the
Satellite
window, you can select the display format. Both formats are used in some
printouts.
.
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