Primordial fluctuations in the CMB, as measured by Spider

The NASA/ESA  Planck satellite is an orbital mission designed to map the sky in both intensity and linear polarization.   The High Frequency Instrument includes six frequency bands between 100 GHz and 1 THz using cryogenic bolometric detectors.  The polarized receivers were developed by this group, and flight tested on the Boomerang balloon borne telescope prior to flying on Planck. The Planck data provide nearly cosmic-variance-limited measurements of the CMB temperature and polarization anisotropies on angular scales ranging from the dipole to well beyond the Silk damping tail. More information on the Planck mission can be found at Wikipedia.

PLANCK Orbiter