Wilkinson Microwave Anisotropy Probe

The data made available through this page has been updated. The most recent version of this data may be accessed through /product/map/current/

The frequency response of the two detectors in each of WMAP's twenty radiometers (two per differencing assembly) are provided in this dataset; there is one file per radiometer. Each file contains three columns:

• The first column contains the frequency in GHz.
• The second and third columns contain the frequency response for the two detectors comprising the radiometer; these values are in linear Rayleigh-Jeans units that have since been normalized to a maximum of one, so these columns are dimensionless.

In principal the bandpass data for the two detectors should be weighted by their response to a thermal spectrum corresponding to how the WMAP data is calibrated in flight. In practice, weighting this bandpass data based upon the area beneath each response curve should be sufficient.

For more information, please see:

• Design, Implementation and Testing of the MAP Radiometers, Jarosik, et.al. (2003)
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: On-Orbit Radiometer Characterization, Jarosik, et.al. (2003)
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Beam Profiles, Data Processing, Radiometer Characterization and Systematic Error Limits, Jarosik, et.al. (2007)
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Five Year Explanatory Supplement, Limon, et.al.

Back to Product Page