This is a postprint version of the following published document: Pastor-Rodríguez, A., Sánchez-Arriaga, G., Sanjurjo-Rivo, M. (2017). Modeling and Stability Analysis of Tethered Kites at High Altitudes. Journal of Guidance, Control, and Dynamics, 40(8), pp.: 1892-1901. DOI: https://doi.org/10.2514/1.G002550 © 2017 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the ISSN 0731-5090 (print) or 1533-3884 (online) to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp.