3CAT-2: A 6U CubeSat-based multi-constellation, dual-polarization, and dual-frequency GNSS-R and GNSS-RO experimental mission

³Cat-2 Assembly, Integration and Verification (AIV) activities of the Engineering Model (EM) and the Flight Model (FM) are being carried out at present. The Attitude Determination and Control System (ADCS) and Flight Software (FSW) validation campaigns will be performed at Universitat Politècnica de Catalunya (UPC) during the incomings months. An analysis and verification of the ³Cat-2 key mission requirements has been performed. The main results are summarized in this work.