WMAP DR4 Single Year Smoothed 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/"
Recommended download procedure for '.fits' or '.tar.gz' files:
K1 and Ka1 smoothed skymaps used in conjunction with the foreground templates to perform foreground cleaning on the WMAP sky maps.