TLE options - Historique des versions

Admin : /* Best periodic TLEs */

2021-09-10T12:15:25Z

Best periodic TLEs

← Version précédente		Version du 10 septembre 2021 à 12:15
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	Note that in case of several <font color=#FF8C00 title="Two Lines Elements">TLEs</font> computation, if the “Maneuvers consideration” option is selected, the reduction of the amount of points as soon as a maneuver is detected will be done for each date.		Note that in case of several <font color=#FF8C00 title="Two Lines Elements">TLEs</font> computation, if the “Maneuvers consideration” option is selected, the reduction of the amount of points as soon as a maneuver is detected will be done for each date.

	== Best periodic TLEs ==		=== Best periodic TLEs ===

	It is almost the same kind of option as the dated one but rather than to specify a list of epochs, the user will specify an initial epoch and a recurrent period. The parameters to set will be:		It is almost the same kind of option as the dated one but rather than to specify a list of epochs, the user will specify an initial epoch and a recurrent period. The parameters to set will be:

Admin : /* Best dated TLEs */

2021-09-07T12:02:48Z

Best dated TLEs

← Version précédente		Version du 7 septembre 2021 à 12:02
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	With this option, several <font color=#FF8C00 title="Two Lines Elements">TLEs</font> will be computed for each epoch specified in the list below. So, we will have to set the following parameters:		With this option, several <font color=#FF8C00 title="Two Lines Elements">TLEs</font> will be computed for each epoch specified in the list below. So, we will have to set the following parameters:

	* ~~the~~ maximum amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font> as in the previous option		* The maximum amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font> as in the previous option
	* ~~the~~ minimum duration for updating a <font color=#FF8C00 title="Two Lines Elements">TLE</font> (useful at the end of the ephemeris as when maneuvers are taken into account.		* The minimum duration for updating a <font color=#FF8C00 title="Two Lines Elements">TLE</font> (useful at the end of the ephemeris as when maneuvers are taken into account.
	* The list of epochs.		* The list of epochs.

	[[Fichier:TleComputationBestDated.png]]		[[Fichier:TleComputationBestDated.png]]

			Note that in case of several <font color=#FF8C00 title="Two Lines Elements">TLEs</font> computation, if the “Maneuvers consideration” option is selected, the reduction of the amount of points as soon as a maneuver is detected will be done for each date.

			== Best periodic TLEs ==

			It is almost the same kind of option as the dated one but rather than to specify a list of epochs, the user will specify an initial epoch and a recurrent period. The parameters to set will be:
			* The maximum amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font> as in the previous option
			* The minimum duration for updating a <font color=#FF8C00 title="Two Lines Elements">TLE</font> as in the previous option.
			* The initial epoch for the first <font color=#FF8C00 title="Two Lines Elements">TLE</font> of the list.
			* The period to update the <font color=#FF8C00 title="Two Lines Elements">TLE</font>.

			[[Fichier:TleComputationBestPeriodic.png]]

Admin le 7 septembre 2021 à 11:57

2021-09-07T11:57:01Z

← Version précédente		Version du 7 septembre 2021 à 11:57
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	=== Best single TLE ===		=== Best single TLE ===

	Only one TLE will be computed but a post process will be executed to search which amount of points in the ephemeris gives the best precision in semi-major axis. So, we will have to set the following parameters:		Only one <font color=#FF8C00 title="Two Lines Elements">TLE</font> will be computed but a post process will be executed to search which amount of points in the ephemeris gives the best precision in semi-major axis. So, we will have to set the following parameters:
	o the required epoch for this TLE as for the previous option.
	o the maximum amount of points in the ephemeris to fit the TLE (so, the post process will compute TLE using 1 point to this amount of points). This amount of points will be eventually reduced if there is less points in the ephemeris		* the required epoch for this <font color=#FF8C00 title="Two Lines Elements">TLE</font> as for the previous option.
	o the amount of points for comparison between points of the ephemeris and points computed thanks to this TLE.		* the maximum amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font> (so, the post process will compute <font color=#FF8C00 title="Two Lines Elements">TLE</font> using 1 point to this amount of points). This amount of points will be eventually reduced if there is less points in the ephemeris
			* the amount of points for comparison between points of the ephemeris and points computed thanks to this <font color=#FF8C00 title="Two Lines Elements">TLE</font>.

			[[Fichier:TleComputationBest.png]]

	=== Best dated TLEs ===		=== Best dated TLEs ===

			With this option, several <font color=#FF8C00 title="Two Lines Elements">TLEs</font> will be computed for each epoch specified in the list below. So, we will have to set the following parameters:

			* the maximum amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font> as in the previous option
			* the minimum duration for updating a <font color=#FF8C00 title="Two Lines Elements">TLE</font> (useful at the end of the ephemeris as when maneuvers are taken into account.
			* The list of epochs.

			[[Fichier:TleComputationBestDated.png]]

Admin : /* Best single TLE */

2021-09-07T11:52:41Z

Best single TLE

← Version précédente		Version du 7 septembre 2021 à 11:52
Ligne 33 :		Ligne 33 :

	=== Best single TLE ===		=== Best single TLE ===

			Only one TLE will be computed but a post process will be executed to search which amount of points in the ephemeris gives the best precision in semi-major axis. So, we will have to set the following parameters:
			o the required epoch for this TLE as for the previous option.
			o the maximum amount of points in the ephemeris to fit the TLE (so, the post process will compute TLE using 1 point to this amount of points). This amount of points will be eventually reduced if there is less points in the ephemeris
			o the amount of points for comparison between points of the ephemeris and points computed thanks to this TLE.

	=== Best dated TLEs ===		=== Best dated TLEs ===

Admin : /* Single TLE */

2021-09-07T11:52:12Z

Single TLE

← Version précédente		Version du 7 septembre 2021 à 11:52
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	* the amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font>.		* the amount of points in the ephemeris to fit the <font color=#FF8C00 title="Two Lines Elements">TLE</font>.

			[[Fichier:TleComputationSingle.png]]

	~~[[Fichier~~:~~TleComputationSingle~~.~~png]]~~		A specific check box exists to know if maneuvers will be considered or not. This option is common to all the <font color=#FF8C00 title="Two Lines Elements">TLE</font> build options. If the option is not selected, the <font color=#FF8C00 title="Two Lines Elements">TLE</font> computation will not care about maneuvers even if some exist: in that case, the <font color=#FF8C00 title="Two Lines Elements">TLE</font> precision will not be very good! On the contrary, if the option is selected, the ephemeris interval to take into account will be reduced to take into account only points before the first encountered maneuver.

	=== Best single TLE ===		=== Best single TLE ===

	=== Best dated TLEs ===		=== Best dated TLEs ===

Admin le 7 septembre 2021 à 11:48

2021-09-07T11:48:49Z

@@ Ligne 1 : / Ligne 1 : @@
-There are several options to build <font color=#FF8C00 title="Two Lines Elements">TLEs</font>. The common options are the following ones:
+There are several options to build <font color=#FF8C00 title="Two Lines Elements">TLEs</font>.
 * '''Position tolerance''': it defines the precision on position obtained during the fitting process.
@@ Ligne 9 : / Ligne 13 : @@
 * '''Maximum amount of iterations''': this entry limits the amount of iteration during the fitting process.
-All these options correspond to the [http://patrius.cnes.fr PATRIUS] <font color=#4169E1>TLE</font> class. Thus, it is possible to get more information on it by reading the [http://patrius.cnes.fr PATRIUS Wiki].
+All these parameters correspond to the [http://patrius.cnes.fr PATRIUS] <font color=#4169E1>TLE</font> class. Thus, it is possible to get more information on it by reading the [http://patrius.cnes.fr PATRIUS Wiki].

Admin le 7 septembre 2021 à 11:35

2021-09-07T11:35:05Z

← Version précédente		Version du 7 septembre 2021 à 11:35
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	* '''Maximum amount of iterations''': this entry limits the amount of iteration during the fitting process.		* '''Maximum amount of iterations''': this entry limits the amount of iteration during the fitting process.

	All these options correspond to the [[http://patrius.cnes.fr PATRIUS]] TLE class. Thus, it is possible to get more information on it by reading the [[http://patrius.cnes.fr PATRIUS ~~Xiki]~~].		All these options correspond to the [http://patrius.cnes.fr PATRIUS] <font color=#4169E1>TLE</font> class. Thus, it is possible to get more information on it by reading the [http://patrius.cnes.fr PATRIUS Wiki].

Admin : Page créée avec « There are several options to build TLEs. The common options are the following ones: * '''Position tolerance''': it d... »

2021-09-07T11:23:33Z

Page créée avec « There are several options to build <font color=#FF8C00 title="Two Lines Elements">TLEs</font>. The common options are the following ones: * '''Position tolerance''': it d... »

Nouvelle page

There are several options to build <font color=#FF8C00 title="Two Lines Elements">TLEs</font>. The common options are the following ones:

* '''Position tolerance''': it defines the precision on position obtained during the fitting process.
* '''Position Only''': if this option is selected, the fitting iteration will only be done on positions and not velocity.
* '''Using BStar''': with this option Bstar parameter will be taken into account
* '''Type of method''': we may choose between two different methods
** Differential method
** Levenberg Marquardt method
* '''Maximum amount of iterations''': this entry limits the amount of iteration during the fitting process.

All these options correspond to the [[http://patrius.cnes.fr PATRIUS]] TLE class. Thus, it is possible to get more information on it by reading the [[http://patrius.cnes.fr PATRIUS Xiki]].

TLE options - Historique des versions

Admin : /* Best periodic TLEs */

Admin : /* Best dated TLEs */