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    Re: How often can you see the sunrise/sunset - PLEASE HELP?
    From: Marcel Tschudin
    Date: 2007 Dec 6, 01:29 +0200

    On Dec 5, 2007 10:00 PM, Isonomia  wrote:
    > ...
    > But I'm still stuck on even very basic information link e.g. would the
    > probability of seeing the sun and sunrise/set be the same in winter
    > and summer?
    The answer to this you find in my previous reply. Isn't it also in the
    UK in summer generally hotter than in winter? If so, then the chances
    are that there is generally a greater cloud cover in winter than in
    If you would like to find out more on this I invite you to do some
    statistical analysis yourself. The data are readily available through
    the Internet. Have a look here:
    After selecting a place you like to investigate you come to the
    Web-page with the current conditions.
    Look on this page for "History & Almanac" and select a previous day
    and press "GO".
    You receive now all the measurements of the station at this day, which
    - depending on the station - may be up to about half-hourly intervals.
    In the last column you find the cloud cover. The terms like "Scattered
    clouds" or "Overcast" etc. refer to approx. percent values of cloud
    coverage. (Since I don't know this relationships, you have to find out
    on this yourself.) From this page you can retrieve the "Daily" data.
    For doing statistical analysis you may want to have the information in
    form of a data file. For this you go down at the bottom of this page
    and select "Comma Delimited File" and transfer the data by copy/paste.
    For a statistical analysis you probably may want to have data of a
    complete month, a year or even several years. For this you go to the
    top of this Daily Summary page and select the the "Weekly", "Monthly"
    or "Custom" data. The Comma Delimited Files of those data have the
    amount of cloud cover as a number; I'm not sure but I think the value
    refers to multiples of 1/8th.
    The comma delimited files have the advantage to be red into a
    spreadsheet program like Excel where you can perform your analysis
    I think that's all what I can help you on this subject. I wish you
    good luck. Don't forget to inform those who might be interested in the
    results (like me) on your results.
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