of masks Different mask patterns exhibit different image resolutions, sensitivities and background-noise rejection, and computational simplicities and ambiguities, aside from their relative ease of construction. FZP = Fresnel Zone Plate ORA = Optimized RAndom pattern URA = Uniformly Redundant Array HURA = Hexagonal Uniformly Redundant Array MURA = Modified Uniformly Redundant Array Levin Coded-aperture space telescopes Spacelab-2 X-ray Telescope XRT (1985) Rossi X-ray Timing Explorer (RXTE) – ASM (1995–2012) BeppoSAX – Wide Field Camera (1996–2002) INTEGRAL – IBIS and SPI (2002–present) Swift – BAT (2004–present) Ultra-Fast Flash Observatory Pathfinder mission (launched 2016) and UFFO-100 (its next generation) Astrosat – CZTI (Launched in 2015) SVOM – ECLAIRs (Projected launch in 2022) In addition, the SAS-3 and RHESSI missions detect radiation based on a combination of masks and rotational modulation See also Computational photography Deconvolution Pinhole camera Rotational modulation collimator Tomographic reconstruction X-ray computed tomography References External links Coded Aperture Imaging in High-Energy Astronomy List of CA instruments – 6 flying. March 2006 In the news: Sky-high system to aid soldiers. August 2008 Radiation Observational astronomy Physical computing