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Get sunrise and sunset times

Terminal - Get sunrise and sunset times
l=12765843;curl -s http://weather.yahooapis.com/forecastrss?w=$l|grep astronomy| awk -F\" '{print $2 "\n" $4;}'
2010-10-24 20:02:30
User: houghi
Functions: awk grep
3
Get sunrise and sunset times

This will get the sunrise and sunset times of a specific location. To be able to determine $l you need to first go to http://weather.yahoo.com/ and look up your location. The last numbers in the URL will be the $l

Instead of forecastrss?w=$l you can also use forecastrss?p=$l and use the RSS link of the city you found.

Also see http://developer.yahoo.com/weather/ for more information

Alternatives

There are 11 alternatives - vote for the best!

Terminal - Alternatives
sunrise() { city=${1-Seattle}; w3m "google.com/search?q=sunrise:$city" | sed -r '1,/^\s*1\./d; /^\s*2\./,$d; /^$/d' ;}
2010-11-02 21:24:23
User: hackerb9
Functions: sed
0

Uses Google's "OneBox" to look up the sunrise in any city by name. If no city is specified, it defaults to Seattle. For the sunset time, you change the search query to "sunset", like so,

.

sunset() { city=${1-Seattle}; w3m "google.com/search?q=sunset:$city" | sed -r '1,/^\s*1\./d; /^\s*2\./,$d; /^$/d' ;}

.

"OneBox" is Google's term for that box that appears before the organic search results that has useful information that Google thinks you might be looking for (mathematical calculations, weather, currency conversions, and such). I'm not actually using OneBox correctly, but that's because I'm not sure that there is a "correctly". I looked for a command line API, but couldn't find one, so I settled on parsing stdout from the fantastic w3m web browser. I use the sed script to show only the first hit by deleting everything from the beginning of the file until it sees " 1." and then deleting everything from " 2." to the end of the file. Ugly and fragile, yes, but it works fine.

.

BUG1: w3m represents the picture of the sun rising, "weather_sunset-40.gif" as "[weat]" which is slightly confusing and probably should be removed.

.

BUG2: The output is more easily readable by a human, which means it's less useful for scripting.

Know a better way?

If you can do better, submit your command here.

What others think

Great, that is definitely shorter than what I was trying (using NOAA), but it doesn't leave much room for the auto-dimming code at sunset. I also am displeased by having to set the "l" variable. I wonder if we can use /etc/timezone instead.

Comment by hackerb9 248 weeks and 4 days ago

Great one!

Might be useful for my home automation I am setting up.

Comment by DaveQB 248 weeks and 4 days ago

Timezone go from east to west, sunset goes (more) from north to south.

You should be able to calculate the sunset and sunrise with the following information:

latitude and longitude, date, timezone.

Not sure how that is done. http://williams.best.vwh.net/sunrise_sunset_algorithm.htm gives an idea. You still need Latitude and longitude

Comment by houghi 248 weeks and 3 days ago

anyone got a .bashrc alias for this? I failed at it. - Thanks.

Comment by Habitual 248 weeks and 2 days ago

.bashrc:

echo Sunrise is at `l=12776844;curl -s http://weather.yahooapis.com/forecastrss?w=$l|grep astronomy| awk -F\" '{print $2}'`

echo Sunset is at `l=12776844;curl -s http://weather.yahooapis.com/forecastrss?w=$l|grep astronomy| awk -F\" '{print $4}'`

good enough.

Comment by Habitual 248 weeks and 2 days ago

Your point of view

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