[Copyright notice]

Copyright © 2013 by the German Institute of Navigation (DGON). All rights reserved. Published by CUVILLIER VERLAG, Goettingen, Germany. No part of the IRS 2013 proceedings (text passages, figures, data or other material) may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, photocopying, recording, scanning, or otherwise, without either prior written permission of the authors of an article or written permission of the DGON.