Perspectives of auroral X-ray measurements in the 1980s

The measurement of auroral X-rays with balloon-borne instruments is an efficient means to study the behaviour of electrons with energies above about 30 keV in the magnetosphere during disturbed periods. Possibilities will be discussed to continue such measurements in the 1980's. It will be pointed out, what kind of investigations may be performed. Recently developed payloads will be described that can be used as a basis for further technical developments. Satellite projects scheduled for the 1980's will be presented that are suited for coordinated X-ray measurements.