Key points are not available for this paper at this time.
The largest anisotropy in the cosmic microwave background (CMB) is the ~3 mK dipole assumed to be due to our velocity with respect to the CMB. Using the 4 year data set from all six channels of the COBE Differential Microwave Radiometers (DMR), we obtain a best-fit dipole amplitude 3. 358 +/- 0. 001 +/- 0. 023 mK in the direction (l, b) = (264. 31ᵈeg^ +/- 0. 04ᵈeg^ +/- 0. 16ᵈeg^, +48. 05ᵈeg^ +/- 0. 02ᵈeg^ +/- 0. 09ᵈeg^), where the first uncertainties are statistical and the second include calibration and combined systematic uncertainties. This measurement is consistent with previous DMR and FIRAS results.
Lineweaver et al. (Tue,) studied this question.