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Center Independent Research & Development: GSFC IRAD

The Balloon Experimental Twin Telescope for Infrared Interferometry : Returning to Flight (BETTII)

Completed Technology Project

Project Introduction

The Balloon Experimental Twin Telescope for Infrared Interferometry (BETTII) is an 8-meter far-infrared (30-90 micron) Michelson interferometer, designed to fly on a high altitude balloon. Scientifically, the spatially-resolved spectroscopy for BETTII will provide unique new scientific data for the study of star formation regions; technically, it paves the way for future interferometric space missions needed to answer key questions about our universe. The BETTII project was funded by NASA HQ from 2011-2017, and had an engineering flight in June 2017. At the end of the flight, an anomaly led to the loss of the payload. We are now working to rebuild BETTII, focusing this effort on lessons-learned from the flight an upon incorporating new designs to make BETTII2 even more capable.

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