Integral STM testing at ESTEC

The Structural/Thermal Test Model (STM) of ESA's Integral gamma-ray observatory was tested in the Large Space Simulator (LSS) at ESTEC in June 1998. Following the thermal-vacuum testing in the LSS, the STM underwent mass property measurements in the Multi-shaker area, and was then moved into the Large European Acoustic Facility (LEAF). The STM is seen here with Project Scientist Christoph Winkler (left, in dark blue coat) during a media presentation on 22 September 1998. Integral is planned for launch in 2001 to perform fine imaging and spectroscopy of 15 keV to 10 MeV celestial gamma-ray sources. [Image Date: 22-09-98] [98.09.015-011]