a 3d rendering of an aerostat model

aerostat balloon airship blimp helium gas technology military sky surveillance research wind meteorology hydrogen communication stability hot air atmosphere envelope three dimensional cut scientific experiment science midair white color monitor flying inflatable levitation vehicle aerospace industry high aerodynamic cloud reconnaissance aircraft taking activity drag platform duration tether laws advertising altitude lighterthanair dirigible aeronautics buoyancy space observation isolated floating monitoring payload 3d ballonet tethered flight lift clouds rendering aviation highaltitude aerodynamics