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Satellite operation requires special knowledge, qualifications, and practical hands-on experience gained through extensive training in a very realistic simulation environment. While communication satellites can be monitored at 24/7 basis Earth Observation satellites have limited visibility from the station so that challenges such as working under pressure during short contact times and in-advance...
This paper discusses the challenges in Earth Observation (EO) satellite operations based on the experience of involvement in more than 50 satellite missions in over 30 years. The operational challenges are discussed with analogies between the operator - mission control system - satellite relationship and pilot - cockpit - aircraft relationship which is more commonly known. Finally the paper derives...
Global Navigation Satellite Systems (GNSS) are today part of our daily life. Besides the US Global Positioning System (GPS) further systems are in use or are being deployed such as GLONASS, GALILEO, COMPASS, IRNSS. Many effects, such as the ionosphere degrade the GNSS performance. Space Based Augmentation Systems (SBAS) augment GNSS system performance locally by broadcasting additional correction...
GNSS augmentation systems (such as GBAS and SBAS) work around the central concept of providing Integrity to the user. The Integrity is a measure of reliability that the user can place on the system to provide a certain guaranteed performance and timely warning from potentially unfavorable scenarios. Various performance assessment studies use Integrity as a performance indicator and the computation...
The space environment imposes risks on the space assets and the services provided by or depending on satellites, such as communication, navigation, and intelligence. Space assets are vulnerable and protection means are very limited. Therefore SSA is the basis for the safe usage of space and protection of valuable space assets.
This paper gives a short summary of the corresponding poster session. The ESA Galileo System Simulation Facility (GSSF) is a simulation environment that reproduces the functional and performance behaviour of the Galileo system to support the simulation needs during the entire Galileo programme lifecycle. It is capable of simulating, besides the nominal system, also its various degraded modes, in a...
Space Situational Awareness (SSA) is crucial for the safety of valuable space assets and the services provided by them. Some examples of these services are navigation, communication, broadcasting, environment protection, earth observation, meteorology and science. Due to the harsh space environment, debris, micrometeorites, number of satellites in orbit, the increasing number of actors in space, and...
Although engineering education usually covers most parts of satellite design, only a few universities cover the operational and practical part of spacecraft operations. Several universities in Europe have recognized this gap and offer also satellite operations courses. The Spacecraft Operations Training Centre (STC) based on in-house experience of over 30 years of spacecraft operations provides an...
This paper presents applications of GNSS simulation from system analysis to application development. Many examples are given where the the Galileo System Simulation Facility (GSSF) has been used. Therefore a brief introduction of the GSSF is given including the validation approach used, its use in system analysis, application development support, GNSS training, and exemplary GNSS analysis results...
ATB is a software simulation framework modeling orbital and spacecraft dynamics, environment, and Attitude and Orbit Control System (AOCS) sensors and actuators. It is an ideal tool for organizations wanting to increase their awareness and knowledge of satellite AOCS closed loop systems. It includes closed-loop functional control models which utilize the sensor and actuator software models, and is...
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