A system for allowing a user to accurately estimate the elevation angle (EA) of one or more surrounding objects (O), particularly whether the one or more objects (O) are below or above a maximum elevation angle (EA), the one or more objects (O) surrounding a user terminal having an antenna for communication with a satellite in a non-geostationary satellite communication system, the system comprising: a camera device for capturing a real-time image of the sky, the camera device including an image sensor having a predetermined number of pixels and a wide-angle lens arrangement , the camera device being integrated to the housing of the user terminal adjacent to the antenna of the user terminal or being removably mounted on the housing of the user terminal next to the antenna and being oriented to face up toward the sky, the wide angle lens providing a requisite edge-to-edge field-of-view (FOV) of the sky of at least 90 degrees to be included in the real-time image, comprising a video image or a still image , captured by the image sensor ; and a display device for displaying the real-time image of the sky captured by the camera device ; wherein one of the camera device and the display device generates an elevation limit marking that is superimposed on the real-time image of the sky displayed by the display device to indicate a maximum elevation angle (EA) above a horizon of the earth; wherein the elevation limit marking is a circle having a diameter D that is measured in a number of pixels of the image sensor according to: D in number of pixels =2 ∗ (90-maximum elevation angle (EA) in degrees)/α, where α is the angle in degrees seen by one of the pixels of the image sensor , wherein the user terminal and the camera device are leveled relative to the ground; and wherein the system is re-positionable by a user until all the one or more objects (O) in a field of view (FOV) of the camera device remain below the maximum elevation angle (EA). a camera device for capturing a real-time image of the sky, the camera device including an image sensor having a predetermined number of pixels and a wide-angle lens arrangement , the camera device being integrated to the housing of the user terminal adjacent to the antenna of the user terminal or being removably mounted on the housing of the user terminal next to the antenna and being oriented to face up toward the sky, the wide angle lens providing a requisite edge-to-edge field-of-view (FOV) of the sky of at least 90 degrees to be included in the real-time image, comprising a video image or a still image , captured by the image sensor ; and a display device for displaying the real-time image of the sky captured by the camera device ; wherein one of the camera device and the display device generates an elevation limit marking that is superimposed on the real-time image of the sky displayed by the display device to indicate a maximum elevation angle (EA) above a horizon of the earth; wherein the elevation limit marking is a circle having a diameter D that is measured in a number of pixels of the image sensor according to: D in number of pixels =2 ∗ (90-maximum elevation angle (EA) in degrees)/α, where α is the angle in degrees seen by one of the pixels of the image sensor , wherein the user terminal and the camera device are leveled relative to the ground; and wherein the system is re-positionable by a user until all the one or more objects (O) in a field of view (FOV) of the camera device remain below the maximum elevation angle (EA). <EOS>