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Monitoring of Ice on the Entrance Window |
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It's been 2 months since the NIRSPEC service. There does not appear to be significant water ice absorption. The current curve is purple.
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Divided Flats |
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15 months have passed since the NIRSPEC service. NIRSPEC will be taken offline for a warm and pump service between August 14 and September 9. We are looking to stay ahead of the ice.
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Divided Flats |
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NIRSPEC was be taken offline March 7-28 to warm the dewar and pump. This service will test whether simply warming and pumping removes ice from the dewar window, or whether the window needs to be replaced.
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Divided Flats |
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The NIRSPEC entrance window was replaced at the end of March 2006. No icemonitor data were taken until after the earthquake-induced power outage on 15 October 2006. In post-quake icemonitor data, the ice absorption looks similar to the 6 month absorption from the previous window. Compare to 2005 Aug 19 below.
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Divided Flats |
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After about 1 year of service, it seems the ice is returning to the NIRSPEC dewar window. Please see the images and cuts across those images below.
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Divided Flats |
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Please click here to see the complete data set.