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We prove this statement by means of the Melnikov method. <\/jats:p><jats:p> The presence of chaotic behavior results in a random spin-up operation. This randomness is visualized by means of maps of the initial conditions with final nutation angle close to zero. This phenomenon is well described by a suitable parameter that measures the amount of randomness of the process. Finally, we relate this parameter with the Melnikov function in the absence of the spinning rotor and with the presence of subharmonic resonances. <\/jats:p>","DOI":"10.1142\/s0218127400000712","type":"journal-article","created":{"date-parts":[[2003,5,7]],"date-time":"2003-05-07T04:18:55Z","timestamp":1052281135000},"page":"997-1018","source":"Crossref","is-referenced-by-count":37,"title":["CHAOS IN THE REORIENTATION PROCESS OF A DUAL-SPIN SPACECRAFT WITH TIME-DEPENDENT MOMENTS OF INERTIA"],"prefix":"10.1142","volume":"10","author":[{"given":"M.","family":"I\u00d1ARREA","sequence":"first","affiliation":[{"name":"Departamento de Qu\u00edmica, Area de F\u00edsica Aplicada, Universidad de la Rioja, 26004 Logro\u00f1o, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"V.","family":"LANCHARES","sequence":"additional","affiliation":[{"name":"Departamento de Matem\u00e1ticas y Computaci\u00f3n, Universidad de la Rioja, 26004 Logro\u00f1o, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2012,5,2]]},"reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-6413(94)90061-2"},{"key":"p_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00691900"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1016\/0370-1573(79)90023-1"},{"key":"p_4","doi-asserted-by":"publisher","DOI":"10.2514\/3.56136"},{"key":"p_5","first-page":"203","author":"Cochran J. 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