Abstract: The present disclosure provides a method of estimating a quantity associated with a receiver system. The receiver system comprises a plurality of spaced apart receivers that are arranged to receive a signal from a satellite system. The method comprises the step of receiving the signal from the satellite system by receivers of the receiver system. Further, the method comprises calculating a position estimate and an attitude estimate associated with the receiver system using the received signal. The method also comprises determining a relationship between the calculated position estimate and the calculated attitude estimate. In addition, the method comprises estimating the quantity associated with the receiver system using the determined relationship between the calculated position estimate and the calculated attitude estimate.

Abstract: A projector structure, such as a stage use projector, is provided for managing light projection and suitable for replacing a “Gobo” device. The projector structure has a digital micromirror device (DMD) and a refraction and/or reflection device for circulating light beams (R) around the digital micromirror device and maintaining the coaxiality between the light source and the projection lenses.

Abstract: An LED floodlight structure comprising an optical focus variation system composed of a matte screen with adjustable excursion on whose surface are mounted a multiplicity of lenses assembled distally within respective parallel telescopic tubes fitted in correspondence to the light sources.