The most famous experiment is probably the NASA Cosmic Background Explorer (COBE) satellite that orbited in 1989–1996 and which detected and quantified the large scale anisotropies at the limit of its detection capabilities.
Oba vpliva so opazovali s plovilom WMAP, kar je zagotovilo dokaz, da je bilo Vesolje ionizirano zelo zgodaj, pri rdečem premiku večjem od 17.