Yohkoh scientific instrumentation included a Hard X-ray Telescope (HXT), a Soft X-ray Telescope (SXT), a Bragg Crystal Spectrometer (BCS), and a Wide-Band Spectrometer (WBS). These instruments are described in a series of papers in Solar Physics, vol. 136 (1991). First results have been published in Publ. Astron. Soc. Japan, vol 44 (1992). A bibliography of Yohkoh-related publications may be found at http://www.lmsal.com/~aschwand/publications/yohkoh.html (or its copy as of 20150417).

Yohkoh steadily continued its observation more than ten years, and this made Yohkoh the world's first space mission to provide solar images over a whole solar cycle. On 14-Dec-2001, however, observing an annular eclipse, Yohkoh lost its attitude control and became unable to resume observations. Signals from the Yohkoh satellite were kept monitored for more than 2 years after the end of scientific operation. On 12-Sep-2005, Yohkoh re-entered the earth and burned out in the atomoshpere somewhere above the point (24N, 85E).

Here are some more information about Yohkoh mission, spacecraft, and instruments.