In partnership with Raytheon Intelligence and Space, Labsphere Inc. has been developing a technology demonstration system for a new type of on-board absolute radiometric calibration source. The Improved Radiometric Calibration of Imaging Systems (IRIS) addresses the need for reduced risk, cost, size, and mass for next generation Earth Observation (EO) satellites through paired onboard and vicarious calibration methods. In particular, the IRIS High-performance Integrated Flat Illuminator (HIFI) is a compact, combined VISNIR and SWIR (0.4 – 2.3μm), and MWIR-LWIR (3-14μm) Jones radiance source. Funded by the NASA Earth Science Technology Office (Grant to Raytheon #80NSSC20K1676), the IRIS Technology Demonstration Unit currently under test successfully meets significant program specifications for radiance, stability, adjustability, uniformity, and polarization. Development is ongoing to further improve system performance and achieve space flight qualification. This type of new technology additionally may provide a path to on-board calibration for small satellite architectures.
This paper presents results from the NASA ESTO funded ATLIS-P Advanced Technology Demonstration (ATD). The ATLIS-P ATD designed, built and tested a laboratory prototype land imager based on a free form reflective triplet telescope and production digital focal plane assembly (FPA). Results show this prototype system meets Landsat 8 Visible through Shortwave Infrared (VSWIR) requirements with much less size and mass than current land imaging systems. NASA ESTO funded this work through grants 80NSSC18K0103 and NNX16AP64G to Raytheon Company.
The Advanced Technology Land Imaging Spectroradiometer (ATLIS) is a small (0.04 m3), multispectral pushbroom imager to provide visible through shortwave (VSWIR) calibrated imagery for the Sustainable Land Imaging-Technology (SLI-T) reference mission architecture (RMA) [1]. ATLIS is designed to provide imaging spectroradiometry that meets SLI-T RMA key parameters with an instrument that is much smaller and much less massive than previous land imaging systems. This paper describes a NASA ESTO funded project to design, build and test a six spectral band prototype ATLIS called ATLIS-P that will establish whether this compact, low mass design approach with wide field of view (WFOV), free form reflective telescope, large format, small detector digital FPA and on-chip processing meets SLI-T RMA VSWIR requirements.
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