A method to provide broad-band synthetic vision to an aircraft during take-off and/or landing, the method comprising: generating a first radio frequency beam at a first frequency in a millimetre-wave band having a horizontal beamwidth β A and a vertical beamwidth β V, wherein the first radio frequency beam is emitted from a microstrip patch array antenna included in a dual band antenna wherein the horizontal beamwidth β A is narrower than the vertical beamwidth β V; and simultaneously generating a second radio frequency beam at a second frequency in an X-band having an equal horizontal beamwidth α A and vertical beamwidth α V, wherein the second radio frequency beam is emitted from a slotted waveguide antenna included in the dual band antenna, wherein the horizontal beamwidth β A of the first radio frequency beam of the microstrip patch array antenna is narrower than the horizontal beamwidth α A of the slotted waveguide antenna, and wherein the first radio frequency beam of the microstrip patch array antenna has a vertical beamwidth β V that is greater than the vertical beamwidth α V of the second radio frequency beam of the slotted waveguide antenna; simultaneously illuminating a runway through atmospheric obscurants with the first and the second radio frequency beams; receiving at the microstrip patch array antenna a first reflected radiation signal corresponding to scattering and reflections of the first radio frequency beam illumination from the runway and from the atmospheric obscurants, wherein the microstrip patch array antenna directs the first reflected radiation signal towards a millimeter-wave transceiver, which sends said first reflected radiation signal to a processor, and said processor processes it to obtain an image of the runway; and simultaneously receiving at the slotted waveguide antenna a second reflected radiation signal corresponding to scattering and reflections of the second radio frequency beam illumination from the atmospheric obscurants, wherein the slotted waveguide antenna directs the second reflected radiation signal towards an X-band transceiver, which sends said second reflected radiation signal to the processor, and said processor derives an image indicative of the wind shear based on the Doppler shift signature of the second reflected radiation signal. generating a first radio frequency beam at a first frequency in a millimetre-wave band having a horizontal beamwidth β A and a vertical beamwidth β V, wherein the first radio frequency beam is emitted from a microstrip patch array antenna included in a dual band antenna wherein the horizontal beamwidth β A is narrower than the vertical beamwidth β V; and simultaneously generating a second radio frequency beam at a second frequency in an X-band having an equal horizontal beamwidth α A and vertical beamwidth α V, wherein the second radio frequency beam is emitted from a slotted waveguide antenna included in the dual band antenna, wherein the horizontal beamwidth β A of the first radio frequency beam of the microstrip patch array antenna is narrower than the horizontal beamwidth α A of the slotted waveguide antenna, and wherein the first radio frequency beam of the microstrip patch array antenna has a vertical beamwidth β V that is greater than the vertical beamwidth α V of the second radio frequency beam of the slotted waveguide antenna; simultaneously illuminating a runway through atmospheric obscurants with the first and the second radio frequency beams; receiving at the microstrip patch array antenna a first reflected radiation signal corresponding to scattering and reflections of the first radio frequency beam illumination from the runway and from the atmospheric obscurants, wherein the microstrip patch array antenna directs the first reflected radiation signal towards a millimeter-wave transceiver, which sends said first reflected radiation signal to a processor, and said processor processes it to obtain an image of the runway; and simultaneously receiving at the slotted waveguide antenna a second reflected radiation signal corresponding to scattering and reflections of the second radio frequency beam illumination from the atmospheric obscurants, wherein the slotted waveguide antenna directs the second reflected radiation signal towards an X-band transceiver, which sends said second reflected radiation signal to the processor, and said processor derives an image indicative of the wind shear based on the Doppler shift signature of the second reflected radiation signal.