+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Velez, C. E. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 22 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order 1 2 3 Next  Local error control and its effects on the optimization of orbital integration Author(s): Velez, C. E. Abstract: Local error control concept effect on optimization of orbital integration by multistep process NASA Center: Goddard Space Flight Center Publication Year: 1967 Added to NTRS: 2008-05-28 Accession Number: 68N11110; Document ID: 19680001642; Report Number: NASA-TM-X-63027, X-553-67-366 Cowell orbit generator error and time analysis program Author(s): Cigarski, G. A.; Velez, C. E. Abstract: Computer program for numerical integration of equations of motion for artificial earth satellite orbits NASA Center: Goddard Space Flight Center Publication Year: 1967 Added to NTRS: 2008-05-16 Accession Number: 68N17080; Document ID: 19680007611; Report Number: NASA-TM-X-63085, X-553-67-491 The motion of a satellite of the moon Author(s): Felsentreger, T. L.; Giacaglia, G. E. O.; Murphy, J. P.; Standish, E. M., Jr.; Velez, C. E. Abstract: Analytical solution for motion of lunar orbital satellite NASA Center: Goddard Space Flight Center Publication Year: 1966 Added to NTRS: 2006-11-06 Accession Number: 67N11392; Document ID: 19670002063; Report Number: NASA-TM-X-55295, X-547-65-218 Numerical integration of orbits in multirevolution steps Author(s): Velez, C. E. Abstract: Predictor-corrector algorithm applicable to numerical integration of satellite orbits in multirevolution steps NASA Center: Goddard Space Flight Center Publication Year: 1967 Added to NTRS: 2006-11-06 Accession Number: 67N39995; Document ID: 19670030666; Report Number: NASA-TM-X-55966, X-542-67-341 Generalized multistep method as applied to trajectory determination Author(s): Velez, C. E. Abstract: Multistep integration formula for orbit trajectory determination NASA Center: Goddard Space Flight Center Publication Year: 1970 Added to NTRS: 2006-08-02 Accession Number: 71N25301; Document ID: 19710015825 The calculation of efficient high precision orbits by optimum matching of the formulation and numerical integrator Author(s): Velez, C. E. Abstract: The development of improved computer algorithms is considered for calculating earth satellite orbital trajectories by optimum selection of the analytical method that minimizes the number of perturbative acceleration ... NASA Center: Goddard Space Flight Center Publication Year: 1973 Added to NTRS: 2006-08-02 Accession Number: 73N27846; Document ID: 19730019114 General Lagrangian interpolation formulas Author(s): Velez, C. E. Abstract: General Lagrangian interpolation formulas NASA Center: Goddard Space Flight Center Publication Year: 1968 Added to NTRS: 2005-08-25 Accession Number: 68N22809; Document ID: 19680013340; Report Number: NASA-TN-D-4424 Local-error control and its effects on the optimization of orbital integration Author(s): Velez, C. E. Abstract: Local error control for optimization of numerical integration orbit calculation techniques NASA Center: Goddard Space Flight Center Publication Year: 1968 Added to NTRS: 2005-08-25 Accession Number: 68N25867; Document ID: 19680016395; Report Number: NASA-TN-D-4542 Numerical integration of orbits in multirevolution steps Author(s): Velez, C. E. Abstract: Multirevolution predictor-corrector algorithm applicability to numerical integration of orbits NASA Center: Goddard Space Flight Center Publication Year: 1970 Added to NTRS: 2005-08-25 Accession Number: 70N37364; Document ID: 19700028048; Report Number: G-972, NASA-TN-D-5915 Astrodynamics 1975; Conference, Nassau, Bahamas, July 28-30, 1975, Technical Papers Author(s): Powers, W. F.; Rauch, H. E.; Tapley, B. D.; Velez, C. E. Abstract: Articles are grouped under four headings: (1) dynamics and control of satellites; (2) satellite mission analysis; (3) Aeros-B and Symphonie satellite engineering problems; (4) optimization and control techniques applied to ... NASA Center: Goddard Space Flight Center Publication Year: 1976 Added to NTRS: 2004-11-03 Accession Number: 76A43154; Document ID: 19760060188 1 2 3 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007