ABSTRACT
Processed by SPDT .................................................................................388 7.5.2 Active Control of Focus .........................................................................................388 7.5.3 Instruments Athermalized with Metering Structures ..................................... 390
7.5.3.1 Orbiting Astronomical Observatory .................................................... 391 7.5.3.2 Geostationary Operational Environmental Satellite ......................... 394 7.5.3.3 Deep Imaging Multiobject Spectrograph ............................................ 397 7.5.3.4 Athermalization of the Multi-Angle Imaging Spectroradiometer .......398 7.5.3.5 Athermalization of the Hubble Space Telescope Truss Structure ...400 7.5.3.6 Athermalization of the Galaxy Evolution Explorer ........................... 407
7.5.4 Athermalization of Refracting Optical Systems ................................................ 410 7.6 Geometries for Telescope Tube Structures ..................................................................... 415
7.6.1 Serrurier Truss ....................................................................................................... 415 7.6.2 New Multiple-Mirror Telescope .......................................................................... 419 7.6.3 N-Tiered Truss ........................................................................................................422 7.6.4 Chandra Telescope .................................................................................................423 7.6.5 Truss Geometries for Minimal Gravitational and Wind Deflections ............425 7.6.6 Determinate Space Frames ...................................................................................429
