Before "Helios-B" was launched, some modifications were made to the spacecraft based on lessons learned from the operations of "Helios-A". The small engines used for attitude control were improved. Changes were made to the implementation mechanism of the flexible antenna and high gain antenna emissions. The X-ray detectors were improved so that they could detect gamma ray bursts and allowing them to be used in conjunction with Earth-orbiting satellites to triangulate the location of the bursts. As temperatures on "Helios-A" were always greater than below the design maximum at perihelion, it was decided that "Helios-B" would orbit even closer to the Sun, and the thermal insulation was enhanced to allow the satellite to resist 15 percent higher temperatures.