Accession Number : ADA258716


Title :   Simulation and Calculation of the APEX Attitude


Descriptive Note : Scientific rept. no. 11


Corporate Author : RADEX INC BEDFORD MA


Personal Author(s) : McNeil, W J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258716.pdf


Report Date : 29 Jul 1992


Pagination or Media Count : 53


Abstract : A simulation of the APEX attitude is carried out for purposes of development and testing of attitude computation algorithms and for assessment of the accuracy of post-flight attitude determination. It is found that reasonably tractable algorithms give adequate accuracy for determination of attitude control in the vehicle. Sun normal angle will be known to a high precision during sunlit operations. The roll axis in sunlight and the three axes during eclipse will be somewhat less precise, depending mainly on the degree of magnetic contamination. However, it is estimated that these quantities will be of sufficient accuracy as well.


Descriptors :   *SATELLITE ATTITUDE , *SCIENTIFIC SATELLITES , COMPUTER PROGRAMS , ALGORITHMS , COMPUTERIZED SIMULATION , ECLIPSES , SUN , UNMANNED SPACECRAFT , SIMULATION , ATTITUDE CONTROL SYSTEMS


Subject Categories : Astronautics


Distribution Statement : APPROVED FOR PUBLIC RELEASE