EUROPEAN SPACE AGENCY
EUROPEAN SPACE OPERATIONS CENTRE
GROUND SYSTEMS ENGINEERING DEPARTMENT
Mission Analysis Office
CLASSIFICATION OF GEOSYNCHRONOUS OBJECTS
ISSUE 9
by J.P. Arregui and R. Jehn
Produced with the DISCOS Database
February 2007 ESOC Robert-Bosch-Str. 5, 64293 Darmstadt, Germany
<<< Contents
3. Table 1: objects with recently updated orbital elements
This table contains all objects with recently updated orbital elements. The objects are ordered according to the following criteria:
- Status C1, then according to the ascending order of longitude of station keeping.
- Status C2, then according to the ascending order of longitude of station keeping.
- Status D, then according to the ascending order of the mean drift rate (which is equivalent to the
decreasing order of the mean semi-major axis).
- Status L1, then according to the ascending order of the libration period (which is equivalent to the
ascending order of the libration magnitude).
- Status L2, then according to the ascending order of the libration period (which is equivalent to the
ascending order of the libration magnitude).
- Status L3, then according to the ascending order of the libration period (which is equivalent to the
ascending order of the libration magnitude).
The following symbols are used:
- nn: is the reference number.
- COSPAR: is the COSPAR identification.
- Name: is the object's common name.
- Date: is the epoch of the last available TLE.
- λ: is the mean longitude of the satellite (in degrees).
- λ': is the mean drift of the satellite (in deg/days).
- Δa: is the difference between the satellite's mean semi-major axis and the geostationary semi-major axis (in km).
- Δrp: is the perigee mean deviation from the geostationary altitude (in km).
- Δra: is the apogee mean deviation from the geostationary altitude (in km).
- Plib: is the libration period (in days).
- Δλ: is the libration magnitude (in degrees): Δλ=λmax - λmin
- λmin: is the minimum longitude of the libration (in degrees).
- λmax: is the maximum longitude of the libration (in degrees).
- Nly: is the number of Two-Line Elements stored during the last 52 weeks.
- Ntot: is the total number of Two-Line Elements available for this object.
- MJD: is the Modified Julian Date (number of days since 01-Jan-1950) corresponding to "Date"
- a, e, i, Ω, ω and λ are the last values of the satellite's semi-major axis (in km), eccentricity,
inclination (in degrees), right-ascension of the ascending node (in degrees), perigee argument (in
degrees) and longitude (in degrees).
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