The Global Educational Network for Satellite Operations (GENSO) is a game-changer for students and professionals alike. It's an online platform that offers a comprehensive guide to satellite operations.
GENSO was created by the International Telecommunication Union (ITU) and the European Space Agency (ESA) to provide education and training in satellite operations. This initiative aims to bridge the gap between industry and academia.
The GENSO platform is designed to be user-friendly, with interactive modules and case studies that make learning engaging and fun. It's a valuable resource for students, researchers, and professionals working in the satellite industry.
By leveraging the GENSO platform, users can access a wealth of information on satellite systems, operations, and management. This includes topics such as satellite communications, navigation, and remote sensing.
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HumSat Constellation
The HumSat Constellation is a highly scalable and low-cost "swarm-like" network of heterogeneous spacecraft designed for non-commercial applications, mainly scientific and humanitarian support.
It's a collaborative effort between the European Space Agency (ESA) and the HumSat community, with the HumSat system specification and GEOID initiative being developed by UVigo (University of Vigo), Spain.
The HumSat Constellation will be based on a set of specifications developed by customers, with suppliers providing subsystems that meet the requirements of the previous specifications.
The constellation will be tested by commanding the spacecraft of the GEOID contribution, which will be used as the test-bed constellation for the GENSO network.
The GEOID contribution will develop the initial communications backbone for the communications network, and will be the Initial European contribution to the HumSat system.
The HumSat Constellation will be open for participation to any interested non-commercial organization worldwide, with main applications including environmental pollution monitoring and monitoring of difficult access areas.
The constellation will be based on the use of the global GENSO network, and will provide a highly scalable and low-cost solution for non-commercial applications.
System Architecture
The system architecture of the Global Educational Network for Satellite Operations is designed to be highly scalable and flexible. This is achieved through the use of cloud-based infrastructure that allows for easy expansion and contraction of resources as needed.
The network's architecture is based on a microservices design, which enables each service to be developed, tested, and deployed independently. This approach allows for greater agility and faster time-to-market for new features and services.
The system's scalability is further enhanced by the use of containerization, which enables multiple applications to run on a single server, reducing the need for physical hardware and minimizing resource waste.
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System Level Interfaces
At the system level, the various components of the HumSat system are interconnected through a set of standardized interfaces.
The Space-to-Sensor Interface (SSI) provides communications capabilities in the UHF amateur satellite band at 437 MHz, enabling interactions between sensors and spacecraft.
The SSI includes a custom MAC protocol for guaranteeing communications among spacecraft and sensors in a shared medium, as well as a new protocol for data uplink and downlink between satellites and sensors.
The Space-to-Ground Interface (SGI) is defined by each spacecraft development team, with some teams using ECSS tailored to their project's needs, while others may use GENSO ground stations that require meeting specific requirements.
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Users can access the HumSat system's services through the internet via the User-to-HumSat Interface (UHI), which includes secure access and guarantees data confidentiality for each user.
Satellite operators can connect to their ground stations and GENSO remote stations through Satellite Control Center-to-Ground Station Interfaces, which can be established either over the internet or a local area network.
The HumSat Payload Control Facility-to-Satellite Control Center Interfaces define the data exchange between Satellite Control Centers and the central Payload Control Facility, with data being standardized and the same for all satellite developers.
Ship control is facilitated through the provision of AIS signal services.
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Concurrent Design Facility (CDF)
The Concurrent Design Facility (CDF) is a powerful tool for designing complex systems. It's been a leading method for conducting Phase 0 and Phase A studies in the Space Industry for decades.
The European Space Agency first established a CDF at the European Space Research and Technology Center (ESTEC) in 1998. This facility was used to study over 80 potential space missions.
A CDF is equipped with high-tech motion capture projectors and state-of-the-art computers. The ISU CDF room is a great example of this, greatly expanding the educational potential of the facility.
The ISU CDF serves as an indispensable teaching tool for students to learn about the concurrent design process. Students have used the CDF facility to design several space mission concepts, primarily for telecommunications and remote sensing satellites.
The CDF has been in operation at the International Space University (ISU) since 2008. This is after the European Space Agency donated the facility to ISU.
Spacecraft Development Framework
The spacecraft development framework is a crucial part of the Global Educational Network for Satellite Operations (GENSO) system. It allows for the independent development of spacecraft, ground stations, and sensors by different universities, which can then be added to the system without impacting its functionality and performance.
Each spacecraft will be developed by a different university, with its own schedule and orbit. The minimum interface requirements will be imposed on them.
The ground stations will also be developed independently by each university, and they will be encouraged to add their ground stations to the GENSO network. This requires implementing specific interface requirements in the station control systems for remote service provision.
Sensors will be deployed independently by users, with a spacecraft interface imposed, but they will be free to develop their own applications, manage their use, select their location, and define the data transmitted or received.
The constellation formed by spacecraft compatible with GENSO will not be pre-designed, but rather a set of spacecraft freely launched in different flight opportunities without pre-defined orbital positions or orbit control system. This is because CubeSats don't have propulsion and rely on piggyback launches whose orbits are defined by their primary passengers.
Ground Operations
The Global Educational Network for Satellite Operations (GENSO) has made it possible for students and researchers to access educational small spacecrafts in orbit, providing unparalleled levels of access.
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GENSO's development teams from America, Europe, and Japan have worked together to create a system that allows remote access to real-time mission data, even in cases of technical difficulties or maintenance of local ground stations.
A key feature of GENSO is its ability to provide partially remote control of participating ground stations, optimizing uplink fidelity through real-time link budgets and uplink station selection.
The system also performs downlink error-correction by comparing multiple data streams and redundancy checks, ensuring accurate data transmission.
GENSO defines and implements a global standard for educational ground segment software and mission control software interfaces, making it easier for users to communicate with the system.
The ground station at the Central Campus of ISU is a prime example of a GENSO ground station, equipped with three antennas (VHF, UHF, and S-band) and preamplifiers for low-noise signal amplification.
The antennas are connected to a feeder and an IC-910H radio transceiver, allowing for communication with satellites in orbit.
ISU continues to use the ground station for teaching and research, including radio conversations with the International Space Station and downloading telemetry from cube-satellites.
The ground station's pointing system is achieved with M2 AZ-1000A and M2 EL-1000A rotators, operated with RC2800PX-AL and RC2800PX-EL controllers.
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