An infrared scope comprising: an illuminator configured to emit an infrared illumination beam along a trajectory toward a target and illuminate a scene viewed by the user of the scope; an imaging detector configured to receive reflected infrared electromagnetic radiation from the illumination beam and to generate images of a scene including the target from the electromagnetic radiation, the image further including scintillation cells in the trajectory; a processor coupled to the imaging detector and configured to generate video imagery from the images generated by the imaging detector, movement of the scintillation cells in the video imagery being representative of wind speed and wind direction across the trajectory; and a display coupled to the processor and configured to display the video imagery, wherein the processor is further configured to calculate an estimate of the wind speed across the trajectory based on the movement of the scintillation cells, and wherein the imaging detector includes a two-dimensional focal plane array (310; 330) coupled to a read-out integrated circuit, the focal plane array including a plurality of rows of pixels and the read-out integrated circuit is configured to individually and sequentially activate and subsequently deactivate each row of the plurality of rows of pixels to generate lines of image data, each line corresponding to a row of the plurality of rows of pixels, and wherein the imaging detector is configured to construct the images from the lines of image data, wherein a directional orientation of the illuminator is synchronized with the read-out integrated circuit and the illuminator is configured to sequentially illuminate portions of a field of view of the imaging detector, each portion corresponding to an activated row of the plurality of rows of pixels. an illuminator configured to emit an infrared illumination beam along a trajectory toward a target and illuminate a scene viewed by the user of the scope; an imaging detector configured to receive reflected infrared electromagnetic radiation from the illumination beam and to generate images of a scene including the target from the electromagnetic radiation, the image further including scintillation cells in the trajectory; a processor coupled to the imaging detector and configured to generate video imagery from the images generated by the imaging detector, movement of the scintillation cells in the video imagery being representative of wind speed and wind direction across the trajectory; and a display coupled to the processor and configured to display the video imagery, wherein the processor is further configured to calculate an estimate of the wind speed across the trajectory based on the movement of the scintillation cells, and wherein the imaging detector includes a two-dimensional focal plane array (310; 330) coupled to a read-out integrated circuit, the focal plane array including a plurality of rows of pixels and the read-out integrated circuit is configured to individually and sequentially activate and subsequently deactivate each row of the plurality of rows of pixels to generate lines of image data, each line corresponding to a row of the plurality of rows of pixels, and wherein the imaging detector is configured to construct the images from the lines of image data, wherein a directional orientation of the illuminator is synchronized with the read-out integrated circuit and the illuminator is configured to sequentially illuminate portions of a field of view of the imaging detector, each portion corresponding to an activated row of the plurality of rows of pixels.