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| Joint Astronomy Centre |
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Temperature Analysis, June - September 2004The following plots show the temperature difference of coneheads, conebars, spinebars and backing structure between 2h12 and 0h6 HST, during which interval a 160 GHz map was made on 20040712. It appears that when there are significant temperature changes, i.e. not a constant offset, the telescope has slewed to a different position in this time interval. E.g. on 20040706 the telescope stayed in the same part of the sky and the line is almost flat. In the same way, also holography (slewing to 8.5 degrees elevation) affects the temperature distribution in the dish. |
