CMB anisotropy information from current and proposed high resolution (< 0.3 degrees) measurements over limited sky regions will likely succeed from ground and balloon-based platforms. The priority for a space mission is to map the entire sky with > 0.3 degree angular resolution where the cosmological return is high, and the data cannot be readily obtained in any other way. The MAP optics feature back to back 1.4 x 1.6 meter primary reflectors which lead to an angular resolution of < 0.25 degrees in the highest frequency (90 GHz) channel.
The following table gives the angular resolution to be obtained from each of the five MAP frequency bands. The value quoted is the full width at half maximum (FWHM) of the approximately Gaussian central beam lobe, in degrees.
| Frequency | 22 GHz | 30 GHz | 40 GHz | 60 GHz | 90 GHz |
|---|---|---|---|---|---|
| FWHM, degrees | 0.93 | 0.68 | 0.47 | 0.35 | 0.21 |
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Last updated: Thursday, 05-20-1999
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