WMAP DR3 Sky Maps Per Differencing Assembly
The data made available through this page has been updated. The most recent version of this data may be accessed through https://lambda.gsfc.nasa.gov/product/wmap/current/"
HEALPix, nested, res 9 (Nside=512) and res 10 (Nside=1024)
0.23°- 0.93° (frequency dependent)
Iterative algorithms are used to create skymaps from the calibrated differential time-ordered WMAP data for each of the ten differencing assemblies. Each pixel in a map represents a sky temperature for the bandpass appropriate to the differencing assembly. The CMB dipole has been removed from the Stokes I maps.
Maps for each year of WMAP data have been supplied through LAMBDA. Full five year maps were produced by performing a weighted, pixel-by-pixel, mean of the five single year maps; the N_Obs measurement was used to weight this mean. For the Stokes I maps, the mean temperature outside of a preliminary version of the temperature analysis/KQ85 mask was subtracted from each single year map before the five year weighted mean was calculated. The zero point of each five year Stokes I map has been set using a Galactic csc |b| model. The zero level of each single year map has not been set, and is not a meaningful quantity. The N_Obs measurements were added together to produce the final N_Obs measurement. In addition, the full five year Stokes I maps have been smoothed to 1° resolution and are supplied as a separate data product.
Single year Stokes I maps are HEALPix Res 10 (Nside 1024) are supplied to support high-l TT analysis.