Dual-telescope multi-channel thermal-infrared radiometer for outer planet fly-by missions

作者：Aslam Shahid^*; Amato Michael; Bowles Neil; Calcutt Simon; Hewagama Tilak; Howard Joseph; Howett Carly; Hsieh Wen Ting; Hurford Terry; Hurley Jane; Irwin Patrick; Jennings Donald E; Kessler Ernst; Lakew Brook; Loeffler Mark; Mellon Michael; Nicoletti Anthony; Nixon Conor A; Putzig Nathaniel; Quilligan Gerard; Rathbun Julie; Segura Marcia; Spencer John; Spitale Joseph; West Garrett

来源：Acta Astronautica, 2016, 128: 628-639.

DOI：10.1016/j.actaastro.2016.08.009

• Dual-telescope
• Dual-field-of-view
• Filter radiometer
• Icy moons
• Thermal emission
• Surface temperature
• Europa

The design of a versatile dual-telescope thermal-infrared radiometer spanning the spectral wavelength range 8-200 mu m, in five spectral pass bands, for outer planet fly-by missions is described. The dual telescope design switches between a narrow-field-of-view and a wide-field-of-view to provide optimal spatial resolution images within a range of spacecraft encounters to the target. The switchable dual-field of-view system uses an optical configuration based on the axial rotation of a source-select mirror along the optical axis. The optical design, spectral performance, radiometric accuracy, and retrieval estimates of the instrument are discussed. This is followed by an assessment of the surface coverage performance at various spatial resolutions by using the planned NASA Europa Mission 13-F7 fly-by trajectories as a case study.

• 出版日期2016-12