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From: Jeff W. <js...@fa...> - 2009-08-24 16:15:43
Attachments:
terminator.py
terminator.png
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Arto Oksanen wrote: > Thanks for your prompt reply. I should have given a more detailed > explanation. I do know the solar position and then the latitude and > longitude of the point on globe where the Sun is on the zenith. And as > the sun illuminates always half of the globe, I just need to draw a > "dark half globe" over the normal globe. Is this possible? That should > be a lot simpler than drawing continents etc. :-) > > arto Arto: Here's something - is this what you're looking for? It computes the day-night terminator, then shades one side of the terminator gray on a map. -Jeff P.S. I've cc-ed the matplotlib users list in case anyone else has ideas. > > > > 2009/8/24 Jeff Whitaker <jef...@no... > <mailto:jef...@no...>> > > Arto Oksanen wrote: > > Hello from Finland! > > I am writing an utility for quickly seeing where astronomical > events (like a GRB) are visible on Earth. I have installed > Basemap and it generates very nice Earth views, but I still need > to somehow display the day and night on the globe. Any sample > code somewhere or some pointers how to do this? > > I am looking for something like this: > http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif> > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif>> > > TIA! > > arto > > -- > Arto Oksanen > art...@jk... <mailto:art...@jk...> > <mailto:art...@jk... > <mailto:art...@jk...>> > Muurame, Finland > > Arto: This might help: > > http://en.wikipedia.org/wiki/Sunrise_equation > > -Jeff > > > > > -- > Arto Oksanen > art...@jk... <mailto:art...@jk...> > Muurame, Finland -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX : (303)497-6449 NOAA/OAR/PSD R/PSD1 Email : Jef...@no... 325 Broadway Office : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg |
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From: Jeff W. <js...@fa...> - 2009-08-24 19:04:30
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Arto Oksanen wrote: > Thanks Jeff! > > That is just a perfect solution!! > > arto Arto: I've cleaned up that example and added it to svn as examples/daynight.py. -Jeff > > 2009/8/24 Jeff Whitaker <js...@fa... <mailto:js...@fa...>> > > Arto Oksanen wrote: > > Thanks for your prompt reply. I should have given a more > detailed explanation. I do know the solar position and then > the latitude and longitude of the point on globe where the Sun > is on the zenith. And as the sun illuminates always half of > the globe, I just need to draw a "dark half globe" over the > normal globe. Is this possible? That should be a lot simpler > than drawing continents etc. :-) > > arto > > > Arto: Here's something - is this what you're looking for? It > computes the day-night terminator, then shades one side of the > terminator gray on a map. > > -Jeff > > P.S. I've cc-ed the matplotlib users list in case anyone else has > ideas. > > > > > 2009/8/24 Jeff Whitaker <jef...@no... > <mailto:jef...@no...> > <mailto:jef...@no... > <mailto:jef...@no...>>> > > > Arto Oksanen wrote: > > Hello from Finland! > > I am writing an utility for quickly seeing where > astronomical > events (like a GRB) are visible on Earth. I have installed > Basemap and it generates very nice Earth views, but I > still need > to somehow display the day and night on the globe. Any > sample > code somewhere or some pointers how to do this? > > I am looking for something like this: > > http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif> > > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif>> > > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif> > > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif > <http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif>>> > > TIA! > > arto > > -- Arto Oksanen > art...@jk... > <mailto:art...@jk...> > <mailto:art...@jk... > <mailto:art...@jk...>> > <mailto:art...@jk... > <mailto:art...@jk...> > <mailto:art...@jk... > <mailto:art...@jk...>>> > Muurame, Finland > > Arto: This might help: > > http://en.wikipedia.org/wiki/Sunrise_equation > > -Jeff > > > > > -- > Arto Oksanen > art...@jk... <mailto:art...@jk...> > <mailto:art...@jk... > <mailto:art...@jk...>> > Muurame, Finland > > > > -- > Jeffrey S. Whitaker Phone : (303)497-6313 > Meteorologist FAX : (303)497-6449 > NOAA/OAR/PSD R/PSD1 Email : Jef...@no... > <mailto:Jef...@no...> > 325 Broadway Office : Skaggs Research Cntr 1D-113 > Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg > > > > > -- > Arto Oksanen > art...@jk... <mailto:art...@jk...> > Muurame, Finland -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX : (303)497-6449 NOAA/OAR/PSD R/PSD1 Email : Jef...@no... 325 Broadway Office : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg |
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From: Arto O. <art...@jk...> - 2009-08-24 18:09:35
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Thanks Jeff! That is just a perfect solution!! arto 2009/8/24 Jeff Whitaker <js...@fa...> > Arto Oksanen wrote: > >> Thanks for your prompt reply. I should have given a more detailed >> explanation. I do know the solar position and then the latitude and >> longitude of the point on globe where the Sun is on the zenith. And as the >> sun illuminates always half of the globe, I just need to draw a "dark half >> globe" over the normal globe. Is this possible? That should be a lot simpler >> than drawing continents etc. :-) >> >> arto >> > > Arto: Here's something - is this what you're looking for? It computes > the day-night terminator, then shades one side of the terminator gray on a > map. > > -Jeff > > P.S. I've cc-ed the matplotlib users list in case anyone else has ideas. > >> >> >> >> 2009/8/24 Jeff Whitaker <jef...@no... <mailto: >> jef...@no...>> >> >> >> Arto Oksanen wrote: >> >> Hello from Finland! >> >> I am writing an utility for quickly seeing where astronomical >> events (like a GRB) are visible on Earth. I have installed >> Basemap and it generates very nice Earth views, but I still need >> to somehow display the day and night on the globe. Any sample >> code somewhere or some pointers how to do this? >> >> I am looking for something like this: >> >> http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif >> < >> http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif >> > >> < >> http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif >> < >> http://www.fourmilab.ch/cgi-bin/Earth?imgsize=320&opt=-l&lat=57.1667&ns=North&lon=49.125&ew=West&alt=372461&img=learth.evif >> >> >> >> TIA! >> >> arto >> >> -- Arto Oksanen >> art...@jk... <mailto:art...@jk...> >> <mailto:art...@jk... >> <mailto:art...@jk...>> >> Muurame, Finland >> >> Arto: This might help: >> >> http://en.wikipedia.org/wiki/Sunrise_equation >> >> -Jeff >> >> >> >> >> -- >> Arto Oksanen >> art...@jk... <mailto:art...@jk...> >> Muurame, Finland >> > > > -- > Jeffrey S. Whitaker Phone : (303)497-6313 > Meteorologist FAX : (303)497-6449 > NOAA/OAR/PSD R/PSD1 Email : Jef...@no... > 325 Broadway Office : Skaggs Research Cntr 1D-113 > Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg > -- Arto Oksanen art...@jk... Muurame, Finland |
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