Particle background, extra-galactic X-ray, and secondary (albedo) X-ray background radiation as measured by the detector system of GRBAlpha. The data plotted here were acquired during the commissioning phase and contain nearly two days of continuous measurements along the orbit of GRBAlpha. The northern and southern polar regions and the South Atlantic Anomaly are clearly visible with the elevated background levels. Otherwise, the background level is around 100 counts s⁻¹ in the full spectral range. On this map an equal-area Mollweide geographical projection is used where the prime meridian and the equator cross the center.