Title: Progress on a New Architecture for SLI
Presenting Author: Paula Wamsley
Organization: Ball Aerospace
Co-Author(s): Tom Kampe, Lyle Ruppert, Kyle Solander, Robert Warden

Abstract:
The Reduced Envelope Multispectral Sensor (REMI) represents a new sensor architecture that meets all visible, near infrared, and short-wave infrared requirements from the LandSat heritage in a single payload. Low Size, Weight, and Power (SWAP) is achieved through reduced aperture (relative edge response improved with precision scan pattern that eliminates ground motion smear), combined aperture (visible through SWIR) and new, lower SWaP calibration source. This is a step-stare scan architecture rather than the whisk broom or push broom scan architecture of prior LandSat sensors. Compatibility with launch from an ESPA ring also reduces launch costs. REMI validation includes airborne flights that will under fly LandSat 8 for direct comparison of level 1b data and higher data products. Airborne flights will also be conducted over sites with validated ground-based observations as a second, independent check of performance. One goal of the Sustained Land Imaging Technology opportunity is to "Reduce the risk, cost, size, volume, mass, and development time for the next generation SLI instruments, while still meeting or exceeding the current land imaging program capabilities." REMI directly addresses this need. The architecture and design support future inclusion of a thermal infrared channel. When implemented in a constellation, REMI also has the potential to address the goals of improved temporal coverage while still maintaining the program's operational efficiency and ensuring the continuity of land observations into the future.