Airbus Iridium SATCOM System165E5733-00 L-3 Aviation Recorders ProprietaryIssue, Rev. 0221 January 2014Page 203. EQUIPMENT SPECIFICATIONSThis section describes the mechanical and environmental specifications of the components of theAirbus Iridium SATCOM System.3.1 Satellite Data Unit (SDU)This section describes the mechanical and environmental specifications of the components of theSatellite Data Unit (SDU) – see Figure 3-1.Figure 3-1 – Airbus Iridium SATCOM System Satellite Data Unit (SDU).