NORAD Tracking
The ACU will display each required parameter that must be read from the two-line
element set.
Parameter: " Year"
Limits: 2000 to 2099
Description:
Year is the year portion of the Epoch time on which the element set is based.
Note: The input value MUST be a 4 digit number.
e.g.: 2090 is OK but 90 is not. 2001 is OK but 01 is not.
Parameter: " Day of year"
Limits: 0.0 to 365.0
Description:
Day of year and fractional portion of the day on which the element set is based.
Note: Input is up to 12 digit real value.
Parameter: " BSTAR"
Limits: -1.0 to 1.0
Description:
B* (BSTAR) represents a drag co-efficient. It is made up of the ballistic co-efficient
of the object multiplied by a reference value of atmospheric density.
Note: B* has units of 1 / (earth radii)
Parameter: " Inclination [Degrees]"
Limits: 0.0001 to 179.9999
Description:
Earth Centered Inertial Orbital Inclination in a True Earth Mean Equinox (TEME)
reference fixed at the time of Epoch. Units: degrees
Parameter: " RAAN [degrees]"
Limits: 0.0 to 360.0
Description:
Right Ascension of Ascending Node in a True Earth Mean Equinox (TEME)
reference
fixed at the time of Epoch. Units: Degrees
Parameter: " Eccentricity"
Limits: 0.0 to 1.0
Description:
Earth Centered Inertial Eccentricity in a True Earth Mean Equinox (TEME)
reference fixed at the time of Epoch. Units: None
K-4
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