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Ambient Humidity vs Indoor Humidity

Observatory
2 replies•87 views
Jerry Gerber avatar
Jerry Gerber avatar
Hi all,

If the ambient humidity is about 85% outdoors, any one know what the humidity would be at a remote observatory when the roof is closed?

Thanks,
Jerry
David Moore avatar
David Moore avatar
No, not as the question is posed. However if you could say what the temp was at 85% relative humidity (RH) and then ask the question what the relative humidity was with the same airmass at a different temp then this chart will tell you.
https://manual.museum.wa.gov.au/book/export/html/89/index.html
Tony Gondola avatar
Tony Gondola avatar
As the chart above shows it depends on the temp. Might be time to add some remote condition sensing to the rig.