Backup secondary mirror and mechanism for SOFIA

Edwin F. Erickson, Michael A. Honaker, Chad A. Brivkalns, Theodore M. Brown, Nans Kunz, Werner Preuss, Michael R. Haas, Jacobus M. Oschmann, Jr.
2004 Ground-based Telescopes  
The SOFIA telescope has a silicon carbide secondary mirror and a six degree-of-freedom secondary mirror mechanism. Each of these high-technology items represents a single-point failure mode, because both are essential for operation of the observatory, and neither has a spare. Reduced-performance, relatively inexpensive "backup" hardware can enable a large fraction of the planned SOFIA science observations, and so can help to assure a highly reliable flight program. Accordingly, we have
more » ... an aluminum secondary mirror and derived design requirements for a backup secondary mirror mechanism that will meet minimum performance needs.
doi:10.1117/12.555478 fatcat:rvxszhar2fdelidmiumihwxqhm