The GRBAlpha is the first Hungarian-led satellite (developed in Hungarian-Japanese-Slovak cooperation) specifically designed for astrophysical research.In terms of size, this small satellite is identical to the first entirely Hungarian-built satellite, Masat-1: within the approximately 10 × 10 × 11 cm small “cube” are the power supply, the radio transceiver module, the onboard computer, a GPS receiver for precise time measurement, and the detector itself.
The 2U-sized GRBBeta nanosatellite, having dimensions of 100 x 100 x 227mm and a mass around 2.5kg provides packet radio services in the VHF and UHF amateur bands as well as an experimental S-band downlink module. In addition, GRBBeta contains experimental payloads, including an upgraded version of the gamma-ray detector subsystem and attitude determination and control systems along with technologies allowing onboard firmware upgrade (that also have flight heritage on GRBAlpha). This latter feature also allows both the fine-tuning and the complete upgrade of the radio FEC parameters on-the-fly.