Temperature Steps

Temperature step can be defined by calculating the gradient of temperature anisotropies,

Figure 8. Definition of

and

fields.

where the x- and y- component of

are defined as follows

Figure 9. WMAP 1st-year W-band (94GHz) anisotropy map [5].

Figure 10. Temperature step field derived from the above anisotropy map. 64 pixel-demotion was performed in this calculation.