Solar x-ray observation during the flight of Phobos 2 with the RF-15 instrument

During the flight of the Phobos 2 space probe, solar soft X-ray emission was monitored. Using gas proportional counters, the fluxes in two energy bands (2-4 and 4-8 keV) were measured with time resolution up to 2 s during larger events. Now we have at our disposal data of most of the flares, sub-flares and other X-ray emitting events in the period between 14 July 1988 and 17 March 1989. Some examples of the data are presented. At the time of our measurement, the GOES Earth satellite was registering solar X-rays in approximately the same energy bands and we discuss some possibilities of stereoscopic observation during the late phase of the Phobos 2 mission, when the spacecraft-Sun-Earth angle was approaching 60°.