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| In preparation for beam studies on Mars. Mars will have a 8 arcsec diameter. The effective FWHM of gaussian beam observing it will differ from its nominal value as measured on a true point source according to the following curve: | In preparation for beam studies on Mars, we wanted to estimate the impact of Mars diameter (8 arcsec these days) on the determination of NIKA's FWHM. We convolve a true gaussian by a disk and obtain an effective beam that is no longer gaussian. A gaussian can however be fit (with moderate accuracy) around the peak. Restricting to the region where the effective beam is larger than 0.7 times the maximum, we obtain the following distortion pattern {{attachment:fwhm_eff.png}} |
Offline Processing Results
In preparation for beam studies on Mars, we wanted to estimate the impact of Mars diameter (8 arcsec these days) on the determination of NIKA's FWHM.
We convolve a true gaussian by a disk and obtain an effective beam that is no longer gaussian. A gaussian can however be fit (with moderate accuracy) around the peak. Restricting to the region where the effective beam is larger than 0.7 times the maximum, we obtain the following distortion pattern
