## COBE DIRBE Products## DIRBE Calibrated Annual File (DCAF) and DCAF Pixel IndexDownload Links:
The DIRBE measures linear polarization in ecliptic coordinates, with positive position angles measured east of the local line of longitude. Linear polarization is described by the Stokes parameters Q and U, which are related to the degree of polarization, P, and the position angle, alpha, of the sky polarization vector via Q = P cos(2 alpha) and U = P sin(2 alpha). |