l24_groundsysdes

l24_groundsysdes - Ground System Design Col John Keesee...

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Ground System Design Col John Keesee 6/17/2004 1 Lesson Objectives The student will: 1. Be able to list the functions performed by a space systems ground support system. 2. Know factors in ground station design 3. Know components of ground station architecture 4. Know capabilities of typical dedicated ground systems and common multi-user ground support systems 5. Know design considerations for specifying ground system elements. 1
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Overview • Ground Systems – Support the space segment • Command and Control • Monitor spacecraft health • Track • Calculate spacecraft attitude – Relay mission data to the users 6/17/2004 2 Ground systems have a command (uplink) function as well as a data (telemetry and mission data) function. 2
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Ground Station Design Location, location, location Coverage Data-user needs Cost Accessibility Availability Link data rates –G /T s , E IRP Requirements for data handling Communication between ground system elements and data users 6/17/2004 3 These are the important factors in ground station design. The spacecraft orbit and mission characteristics will drive available locations for ground systems. Satellite transmitter characteristics and data rates will determine the ground
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Mission elements and facility elements Ground station is where the Earth-based end of satellite communication takes place Antenna system Receive RF equipment Transmit RF equipment Mission data recovery Data-user interface TT&C equipment Station control center System clock 6/17/2004 4 The ground system consists of both mission (functional) elements and facilities. A ground station would usually consist of most of these elements
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l24_groundsysdes - Ground System Design Col John Keesee...

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