GUSTO, NASA's stratospheric balloon observatory, will bring the Dutch multi-pixel camera system of SRON and TU Delft to the edge of space. It will perform a large-scale observation of the spectral lines from ionized atoms between the stars of the Milky Way. As an extra hardware contribution, SRON-TU Delft delivers a Fourier phase grating. The technique behind it is now published in Optics Express.  Read more