At the 30-m telescope, this correction is not automatically applied to observations with heterodyne receivers (3 mm - 0.8 mm); for this use Table 2 and Fig. 3. An example is given below. The correction is applied to on-off measurements and can be applied optionally to mapping observations with the 230 GHz bolometer when the NIC reduction package is used.

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For contour maps of the homology deformations see Greve et al. (1996).

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...observation

This result is explained from the fact that the homology deformations can be expressed as a fixed set of elevation-scaled Zernike polynomials and additional random errors (see Greve et al. 1996).

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