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- Blomberg, Lars G., et al.
(författare)
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EMMA - the electric and magnetic monitor of the aurora on Astrid-2
- 2004
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Ingår i: Annales Geophysicae. - : Copernicus GmbH. - 0992-7689 .- 1432-0576. ; 22:1, s. 115-123
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Tidskriftsartikel (refereegranskat)abstract
- The Astrid-2 mission has dual primary objectives. First, it is an orbiting instrument platform for studying auroral electrodynamics. Second, it is a technology demonstration of the feasibility of using micro-satellites for innovative space plasma physics research. The EMMA instrument, which we discuss in the present paper, is designed to provide simultaneous sampling of two electric and three magnetic field components up to about 1 kHz. The spin plane components of the electric field are measured by two pairs of opposing probes extended by wire booms with a separation distance of 6.7 m. The probes have titanium nitride (TiN) surfaces. which has proved to be a material with excellent properties for providing good electrical contact between probe and plasma. The wire booms are of a new design in which the booms in the stowed position are wound around the exterior of the spacecraft body. The boom system was flown for the first time on this mission and worked flawlessly. The magnetic field is measured by a tri-axial fluxgate sensor located at the tip of a rigid. hinged boom extended along the spacecraft spin axis and facing away from the Sun. The new advanced-design fluxgate magnetometer uses digital signal processors for detection and feedback, thereby reducing the analogue circuitry to a minimum. The instrument characteristics as well as a brief review of the science accomplished and planned are presented.
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| 2. |
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| 3. |
- Bylander, Lars, et al.
(författare)
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A Modular Design Concept For Small Satellites
- 2002
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Ingår i: Smaller Satellites. - Dordrecht : Springer Netherlands. - 9789048159062 - 9789401730082 ; , s. 357-358
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The objectives of the new design concept (called Bylix) are to minimize the mass and power dissipation of the payload and the platform. The system design is modular to allow concurrent engineering throughout the design, integration and test phases, and to improve project management. The basis of the concept is a common “thin bus” for data and commands, power, frequency synchronization and time distribution, which requires a minimum of resources.
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| 4. |
- Bylander, Lars, et al.
(författare)
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SCALE : A Scaleable Wire Boom System
- 2002
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Ingår i: Smaller Satellites. - Dordrecht : Springer Netherlands. - 9789048159062 - 9789401730082 ; , s. 355-356
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The SCALE wire boom is a compact wire boom unit designed mainly for scientific spin-stabilized satellites. The boom unit provides storage and deployment of a wire boom (length 5–50 m) and a probe (diameter up to about 100 mm). The wire is both a boom and a supplier of the electrical connections between the probe at the end of the wire and the experiment unit in the spacecraft body. The SCALE wire boom is unique because its volume and weight are scaleable with respect to the required boom length and probe diameter.
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