The communication between Space and Ground Segment is a key requirement in all the space missions to accomplish the scope of the mission itself.
In missions such as Earth Observation, deep space and exploration, launchers, ISS, this need is strictly related to the visibility between the spacecraft and the Ground Stations. A DRS mission, through geostationary satellites, can dramatically improve the visibility time for data downloading reducing the need of different Ground Stations located in all Earth regions.
This advantage allows many different space missions to send and receive data from the users, increasing significantly the continuity of the communication links and by consequence the traffic volume downloaded to ground. In this context the EO market segment seems to be the more interested to the benefits provided by a DRS mission. These benefits can be summarized in a reduction of the system response time obtained by means of two different actions:
- Increase of the visibility time between LEO and ground stations, allowing an increasing download capability,
- Possibility to rapid re-task the LEO by means of the rapid telecommanding, reducing the time needed to address the sensor on a specific target.
In particular this last action could be interesting for defence or dual users. For these kind of users, which usually need mandatory requirements for the information security, it is also possible to manage data encryption capabilities, by the implementation of DRS dedicated mission.
In this optic an European DRS mission represents an opportunity for the European Space community to endow with a set of services already available for US space programs (TDRSS mission), that allow a more effective service to all the space initiatives either in civilian or in defence field.