The SPOrt Program

We present the Sky Polarization Observatory (SPOrt) Program, aiming at measuring the linear polarization of the microwave sky. The Program includes space experiments (SPOrt-ISS and SPOrt-EXPRESS), Balloon-borne radiometers (BaR-SPOrt) as well as ground-based observations. The project is described by putting special emphasis on the hardware solutions specifically designed to provide high sensitivity polarization measurements.