NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: How often can you see the sunrise/sunset - PLEASE HELP?
From: Marcel Tschudin
Date: 2007 Dec 6, 01:29 +0200
From: Marcel Tschudin
Date: 2007 Dec 6, 01:29 +0200
Mike, On Dec 5, 2007 10:00 PM, Isonomiawrote: > ... > 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 summer. 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: http://www.wunderground.com/cgi-bin/findweather/getForecast?query=united+kingdom 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 work. 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. Marcel --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---