fly4EO

flight dynamics

Full orbit monitoring and maintenance capabilities

fly4EO is the stand-alone product in charge of the Flight Dynamics System (FDS) function within the gs4EO suite suite of ground segment products developed by Elecnor Deimos.
It is currently working operationally in the Deimos-2 mission.

The Flight Dynamics System algorithms are decomposed in the Orbit Determination and Control System (ODCS) and the Space Debris Monitoring (SDM), which share common data interfaces and functionalities despite performing different functions within the ground segment. Additionally, the Human Machine Interface (HMI) supports the configuration and control tasks of the system.

The ODCS is divided in:

  • Orbit Determination Subsystem, which estimates the parameters needed to describe the trajectory of the spacecraft, as well as other parameters related to the dynamics and observation models. A measure of the accuracy of the estimates is provided in the form of a covariance matrix of the estimated parameters.

  • Generation of the ground station Pass Schedules (acquisition plans): these schedules contain all the planned downlink operations at the corresponding ground stations and its associated data (e.g. orbit information).

  • Orbit Prediction and Maneuver Optimization, which computes the orbit maneuvers required to reach given orbital targets while satisfying given mission constraints during the operational life of the satellite. The sub-system has also to compute and make available the future trajectory in XML and TLE format for use by other elements of the Ground Segment. This trajectory data is used, for instance, to compute attitude profiles, station coverage, antenna pointing elements and eclipses.

  • Flight Dynamics Database (FDDB), a file-based database in which all the relevant FD parameters are stored, together with the historical input/output and configuration data files. The transfer of operations to the backup system requires the transfer of the FDDB.

The main purpose of the Space Debris Monitoring subsystem is to warn FDS operators whenever a collision risk between the spacecraft and another object is detected, providing decision-making support for the triggering of collision avoidance manoeuvres.

The Flight Dynamics System algorithms are decomposed in the Orbit Determination and Control System (ODCS) and Space Debris Monitoring (SDM), which share common data interfaces and functionalities

flight dynamics

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