Verification of the Observatory Integrated Model for the JWST

摘要

The JWST optical performance verification poses challenges not yet encountered in space-based telescopes. In particular the large, lightweight deployable optics pose challenges to verification via direct measurement of the observatory on earth. For example, the lightweight optics have surface distortion due to gravity producing wavefront error greater than the wavefront error specification for the entire observatory. Because of difficulties such as this, the deployable, segmented Primary Mirror and deployable Secondary Mirror will be realigned after launch. The architecture of JWST was designed to accommodate these difficulties as these by including active positioning of the primary mirror segments and secondary. In fact, the requirements are written such that the active control system shall be used to meet the requirements. Therefore many of the optical requirements are necessarily based on modeling and simulations. This requires that the models used to predict the optical performance be verified and validated. This paper describes the validation approach taken and a companion paper describes the optical performance analyses1.