An off-axis, three-mirror anastigmat was optically aligned for minimum wavefront error using three different analysis methods to improve alignment efficiency. The three methods involved CODE V Automatic Design (AUT), CODE V Alignment Optimization (ALI), as well as a Zernike Sensitivity Analysis (SENS). Not all methods converged on the same solution during alignment, but all tools were used in unison to optimize the optical alignment process. During initial optical alignment, the AUT tool better estimated the proper magnitude of the required alignment. As alignment progressively became finer, the ALI and SENS tools both produced superior, more in-family alignment solutions. Conclusively, depending on the coarseness of the optical alignment required, all alignment strategies have their merits, but most importantly each tool provides a check against other alignment solutions. Therefore, all tools aid in directing the optical alignment towards a global minimum.
The NASA ESTO funded Multislit Optimized Spectrometer (MOS) Instrument Incubator Program advances a spatial multiplexing spectrometer for coastal ocean remote sensing from laboratory demonstration to flight-like environment testing. The multiple slit design reduces the required telescope aperture leading to mass and volume reductions over conventional spectrometers when applied to the GEO-CAPE oceans mission. This paper discusses the performance and characterization of the MOS instrument from laboratory and thermal vacuum testing. It also presents the current technology readiness level and possible future applications. Results of an ocean color data product simulation study using flight-like performance data from MOS are also covered. The MOS instrument implementation for GEO-CAPE provides system benefits that may lead to measurable cost savings and reductions in risks while meeting its science objectives.
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