de Moraes, R. V.Kuga, H. K.Campos, D. Y.2014-05-202014-05-202002-01-01New Trends In Space Geodesy. Oxford: Pergamon-Elsevier B.V., v. 30, n. 2, p. 331-335, 2002.0273-1177http://hdl.handle.net/11449/31332The performance of the NORAD models for near Earth satellites (SGP, SGP4, SGP8) using two Brazilian flying satellites, SCD-1 and SCD-2, and the Chinese-Brazilian satellite CBERS-1 is compared. The achievable accuracy of such models is compared against the predicted 2-lines elements set for the satellites. Every week an updated fresh set of 2-lines elements for these satellites is made available through the Internet. About ten years of observations of the SCD-1 satellite are available and therefore solar activity influences on the orbit can be analyzed. Data are selected considering also orbital (for CBERS-1) and attitude (for SCD-2) maneuvers - (C) 2002 COSPAR. Published by Elsevier B.V. Ltd. All rights reserved.331-335engArtigo10.1016/S0273-1177(02)00303-4WOS:000177857000028Acesso restrito7740917144757410