On-orbit thermal distortion and optical performance evaluation of FORMOSAT-5 remote sensing instrument

Clicks: 254
ID: 274301
2012
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Abstract
FORMOSAT-5 is the first space program that National Space Organization (NSPO) takes full responsibility for the complete satellite system engineering design including payload(s). FORMOSAT-5 will operate in a sun synchronous orbit at 720-km altitude with 98.28-degree inclination angle. The optical Remote Sensing Instrument (RSI) can provide 2-m resolution panchromatic and 4-m resolution multi-spectral images. A Cassegrain type of RSI with two reflective aspheric mirrors and spherical corrector lens is designed. The space thermal environment is one of the important factors that affect the image quality of a space optical RSI. Thermal deformation of RSI structure and mirrors will impact the optical performance. Some preliminary thermal and opto-mechanical analyses are conducted. The relationship among temperature distributions, thermal deformations and image degradation of on-orbit behaviors are discussed. The thermal induced instabilities are incorporated in optical models (e.g., OSLO) by use of Zernike polynomial coefficients to calculate the system MTF and WFE. Due to different thermal environments, on-orbit optical performances depend on imaging locations. Detailed studies and discussions are done in this paper to identify the major sources of thermal deformations and their impacts on image quality.
Reference Key
huang2012opticalon-orbit Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chen Ching-Wei,Chen Chia-Ray,Cheng-En Ho,Mei-Yi Yang,Shenq-Tsong Chang,T.-M. Huang;Chen Ching-Wei;Chen Chia-Ray;Cheng-En Ho;Mei-Yi Yang;Shenq-Tsong Chang;T.-M. Huang;
Journal Optical Engineering + Applications
Year 2012
DOI
10.1117/12.928282
URL
https://sciprofiles.com/publication/view/681bdb22297d9236c6bdf7d4e3236525
Keywords
remote sensing image quality engineering satellites distortion lenses orbital dynamics

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