ESA’s Directorate of Telecommunications and Integrated Applications (TIA) is co-organising with the University of Oxford Department for Continuing Education a short course in satellite communications for professionals.
9-10 October 2017, ESTEC, Noordwijk (The Netherlands)
High Altitude Pseudo Satellites (HAPS) are stratospheric platforms that stay over a fixed point on Earth from weeks to months. Capitalising on these developments, the European Space Agency is reaching out to the Telecommunication, Earth...
ADS for antennas.
The A-ADS system enables the deployment of satellite antennas with a large diameter and an extended focal length. The articulated (segmented) boom can be folded in several configurations on the spacecraft sidewall. Three hold-down points, based on similar technology as used on Airbus Defence and Space NL solar arrays (heritage of >500 releases with 100% success), will assure safe accommodation during launch and shock-free release in orbit.
The boom deploys by means of spring-driven hinges interconnected by means of synchronization cables, similar to solar arrays. The deployment speed is
controlled by an actuator. When fully deployed, the hinges are locked, providing a very stiff structure, essential for disturbance-free pointing of the antenna. The pitch-and-roll pointing mechanism (ADTM Mk2 gimbal by Airbus Defence and Space with over 23 in orbit), is located close to the reflector assuring high pointing accuracy.
The A-ADS has a modular design, which allows a wide range of mission configurations by tuning only a few design parameters. This approach in combination with the use of standard building blocks minimizes the non-recurring design effort for a specific application and allows any desired configuration. A special kinematic model is available to assess the design parameters of the A-ADS based on customer inputs.
Enhancing capacity and flexibility is one of the major challenges for new-generation of payloads. The interest of two major European Telecommunication Operators for these solutions has motivated the present study in order to define the possible Generic Payload Solutions in line with the Operator views and with the objective of taking benefit of their guidelines for the down-selection of preferred payload scenarios.
In order to reduce equipment cost a Breadboard LCAMP based on new and innovative technologies and equipment tuning is to be developed. Herby development activities are focused on three main issues:
1) Mixed Signal ASIC to achieve maximum integration of electrical components
2) LTCC technology including a cost- and time-minimized assembly process
3) Fully automated equipment tuning