TwoLineElement Object

Name

Description

ArgumentOfPerigee

Argument of perigee

Bstar

B* term of the two-line-element

Classification

The classification of the element set

DeclaredName

The name of the object as declared.

DisplayName

The name displayed for this object in output windows such as views, plots, and reports.

Eccentricity

Eccentricity

ElementSetNumber

The element set number. Normally, this number is incremented each time a new element set is generated. However, recent practice has this number set to 999 at all times, to avoid confusion after rollovers.

EphemerisType

Ephemeris type (ie. orbital model) used to generate the data

Epoch

The day of year of the epoch of the element set include the fractional portion of the day.

Inclination

Orbit Inclination

InternationalDesignator

The year of the launch, the launch of that year, and the piece of that launch for each object

MeanAnomaly

Mean Anomaly

MeanMotion

Mean motion

MeanMotionDDot

The second derivative of the mean motion divided by six, in units of revolutions per day^3, decimal point assumed, as a string. Note, since this parameter is not used, it is read directly from the TLE, or output directly to it.

MeanMotionDot

The first derivative of the mean motion divided by two, in units of revolutions per day^2 as a string. Note, since this parameter is not used, it is read directly from the TLE, or output directly to it.

ObjectId

The unique identifier for the object.

ObjectType

The type of the object.

RAAN

Right ascension of the ascending node

RevolutionNumber

The revolution number at epoch

SatelliteNumber

The catalog number assigned to the object by the US Air Force

SpacecraftName

The name of spacecraft as read or written as the header line in a three-line-element.

Name

Description

ClearSavedStates

Clears previous saved states for this object.

GenerateTwoLineStrings

Generate strings containing the two-line-element data.

GetFromFile

Load the object state from the specified FreeFlyer object file.

GetFromString

Load the object state from the specified string.

InitializeFromStrings

Initialize the object properties from strings containing the two-line-element set data.

InitializeTLEFromSpacecraft

Initialize the state properties of the TwoLineElement object from a spacecraft.

LoadNoradTLE

Loads a two-line-element set from a file.

PutToFile

Convert the object state to FreeFlyer object xml and write to a file.

PutToString

Convert the object state to FreeFlyer object xml and return as a string.

ReferenceEquals

Returns 1 if the argument refers to the calling object and 0 otherwise.

Restore

Restore an object's state from a previously saved state.

Save

Save the object's state so that it can be restored later.

SetSpacecraftNoradStateFromTLE

Initialize the Spacecraft norad state properties from the TwoLineElement object.

WriteToFile

Write the two-line-element set to a file.