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ALMA Memo #317

Comparison of the antenna pointing error effect on the image quality for two configurations and two source types.

L. Kogan
August 02, 2000

Observation of the two source models: M51 with spiral expanded structure and methanol masers with cluster of compact sources, has been simulated, observed by the two arrays of 64 antennas (12 meter diameter each) at snapshot mode with random pointing error of the antennas. The two configurations: the doughnut and the ring have been considered. The size of the source is equal to a half of the antenna primary beam. The rms of the pointing error was in the range (0-20)\% of the primary beam width. The quality of the restored image is aggravated with increasing the pointing error. The better of the two configuration stays to be better for any pointing error although the difference is becoming small for the large pointing error.

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Last modified: August 4, 2000

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