Design Article
Space qualification of Leti’s Absolute Scalar Magnetometer
Jean-Michel Léger, CEA-Leti
11/23/2010 5:44 AM EST
Image Gallery
Artist view of the Swarm constellation in orbit,
thanks to which a significant step forward is expected in the
identification of the various sources contributing to the Earth’s
magnetic field structure
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Artist view of one of the
three satellites, with the ASM on the tip of the boom
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SWARM flight model: sensor assembly + 1 (of the 2) Data Processing Unit
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Qualification environment: Vibration tests on Swarm sensors
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11/23/2010 10:41 PM EST
Timely project, evidently in good hands. (Timely because of the evidence of a possibly weakening magnetic field, in what may be advance warning of a change in the earth's magnetic polarity. Or so I've read in "The Adventures of Superman.")
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hm
11/23/2010 10:50 PM EST
You have listed descirption of general tests perofrmed for one and all space qualified devices/sytems.
Is it possible to include difficulty encountered and solution offered by innovative test procedure and test systems developed? Also, will you please provide with more quantitive data?
e.g. your LASER is space qualifed for the first time. Do not you have fibre LASER employed in various fibre gyroscopes? Was power of LASER differnt? Also if it is for the first time, how did you derive the test and what were the parameters for it?
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jml38
12/11/2010 11:17 AM EST
Tests procedures were not specially innovative, they were rather derived from standard approved ones currently used in the space business. Which type of quantitative data would you like?
Concerning the space laser, it was the first fiber laser (ie the active medium is a doped fiber) to be qualified . This was confirmed by ESA and NASA specialists at the ICSO conference. For gyroscopes, the fibers are only used to my knowledge as propagation media, the lasers used are usually diode lasers. The fiber laser can emit up to 30 mW @ 1083 nm, but operated at much lower power (# 2 mW) in present application.
The qualification process was established by CNES, the french space agency, based on the mission requirements (environment conditions, duration of mission, expected availability)
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yonnie
11/28/2010 4:24 PM EST
infra-red laser sounds pretty common-place item, perhaps it's a McGuffin?
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