WMAP DR3 Sky Maps Per Differencing AssemblyThe 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/" Coordinate System:
Galactic
Projection Type:
HEALPix, nested, res 9 (Nside=512) and res 10 (Nside=1024)
Resolution:
0.23^{°} 0.93^{°} (frequency dependent)
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Iterative algorithms are used to create skymaps from the calibrated differential timeordered 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, pixelbypixel, 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 highl TT analysis.
Additional Information
