| Arg.
of Perigee |
The
angle (degrees) in the plane of the orbit between a
north-bound equator crossing and perigee.
|
| Decay
rate |
The
satellite orbit's decay rate.
|
| Eccentricity |
Indicates
the flatness of the orbit's ellipse. Approaches zero for a
nearly circular orbit, and tends to 1 for a very flat
ellipse.
|
| Epoch
revolutions |
The
satellite's total orbits at epoch time.
|
| Epoch
time |
The
year, date and time for which the elements are given.
Important: Sometimes the epoch time is indicated as 95
114.23599939. In this case the first two digits (95) stand
for the YEAR and must be entered in the Year part of the
keps. The remaining digits (114.23599939) indicate the
number of days elapsed since the 1st of January, and is the
number to enter in the Epoch Time edit box. The number can
also be entered as 95114.23... (with no spaces after 95).
|
| Inclination |
The
tilt angle (degrees) between the orbit plane and the plane
of the earth's equator.
|
| Mean
anomaly |
The
mean anomaly, or orbit phase, in degrees, of the satellite
at reference epoch T0.
|
| Mean
motion |
The
satellite's orbits per day.
|
| RAAN
Right Ascension of Ascending Node |
(degrees).
If we take the line defined by the intersection of the orbit
plane and the equator, and project it onto the sky until it
intersects a star, then O0 is the longitude-like celestial
coordinate which astronomers call the Right Ascension of
that target star.
|
| Semi
major axis |
This
is the ellipse's semi-major axis. It is calculated
automatically by LOGSAT using the data above.
|
