Garmin GXM42 SiriusXM Antenna The updated SiriusXM Aviation service gives pilots access to comprehensive weather products as they become available, allowing operators to make educated decisions in-flight as it relates to weather. Similar to earlier generation antennas, the GXM 42 offers important weather products such as radar, aviation routine weather reports (METARs), terminal aerodrome forecasts (TAFs), temporary flight restrictions (TFRs), lightning, turbulence forecasts, and more. Data subscriptions and coverage area information are available from SiriusXM.