City:
Deg:
Min:
Sec:
Time Zone

Lat:
North=+
South=-
Offset
to UTC
(MST=+7):
Daylight
Saving
Time
:
Long:
West=+
East=-
Month:
Day:
Year (e.g. 2000):



Local

UTC
<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
   <rdf:Description rdf:about="">
      <Location xmlns="http://purl.org/dc/terms/">
        <rdf:Description rdf:about="http://purl.org/dc/terms/spatial">
             <title xmlns="http://purl.org/dc/terms/" xml:lang="en-US"></title>
             <lat xmlns="http://www.w3.org/2003/01/geo/wgs84_pos#"></lat>
             <long xmlns="http://www.w3.org/2003/01/geo/wgs84_pos#"></long>
        </rdf:Description>
      </Location>
      <PhysicalResource xmlns="http://purl.org/dc/terms/">
        <rdf:Description rdf:about="http://purl.org/dc/terms/temporal">
           <date xmlns="http://purl.org/dc/terms/" rdf:datatype="http://purl.org/dc/terms/W3CDTF"></date>
           <jd xmlns="http://www.example.org/time#"></jd>
           <tzd xmlns="http://www.example.org/time#"></tzd>
        <PeriodOfTime xmlns="http://purl.org/dc/terms/">
          <rdf:Description rdf:about="http://purl.org/dc/terms/Period">
            <duration xmlns="http://www.example.org/time/local/sol#"  rdf:datatype="http://www.w3.org/TR/xmlschema-2/#duration"></duration>
          </rdf:Description>
        </PeriodOfTime>
        <Local xmlns="http://www.example.org/time/local/">
          <rdf:Description rdf:about="http://purl.org/dc/terms/temporal">
            <description xmlns="http://purl.org/dc/terms/" xml:lang="en-US"></description>
            <startAstronomical xmlns="http://www.example.org/time/local/sol#">N/A</startAstronomical>
            <startNautical xmlns="http://www.example.org/time/local/sol#">N/A</startNautical>
            <startCivil xmlns="http://www.example.org/time/local/sol#">N/A</startCivil>
            <rise xmlns="http://www.example.org/time/local/sol#"></rise>
            <xsit xmlns="http://www.example.org/time/local/sol#"></xsit>
            <set xmlns="http://www.example.org/time/local/sol#"></set>
            <endCivil xmlns="http://www.example.org/time/local/sol#">N/A</endCivil>
            <endNautical xmlns="http://www.example.org/time/local/sol#">N/A</endNautical>
            <endAstronomical xmlns="http://www.example.org/time/local/sol#">N/A</endAstronomical>
            <rise xmlns="http://www.example.org/time/local/luna#">N/A</rise>
            <xsit xmlns="http://www.example.org/time/local/luna#">N/A</xsit>
            <set xmlns="http://www.example.org/time/local/luna#">N/A</set>
          </rdf:Description>
        </Local>
        <UTC xmlns="http://www.example.org/time/utc/">
          <rdf:Description rdf:about="http://purl.org/dc/terms/temporal">
            <description xmlns="http://purl.org/dc/terms/" xml:lang="en-US">UTC</description>
            <rise xmlns="http://www.example.org/time/utc/sol#"></rise>
            <xsit xmlns="http://www.example.org/time/utc/sol#"></xsit>
            <set xmlns="http://www.example.org/time/utc/sol#"></set>
          </rdf:Description>
        </UTC>
        </rdf:Description>
      </PhysicalResource>
   </rdf:Description>
</rdf:RDF>

Paste to W3C RDF Validator


Magic Decoder Ring (DO NOT LOSE!!!)
Record Head (ref:Calculation Page)
dct:title (Title)
dct:type (Output RDF/XML)
dct:language (Language)
dct:creator (Author)
dct:modified (Issued)
Record Content dct:identifier (In the Cloud Access Reference "rdf:about")
dct:temporal (Coverage)
dct:spatial (Coverage)
overheid:authority (Responsibility For Calculations
or Engineering Sign-off)
OWMS 4.0
dct:identifier dct:URI rdf:about
overheid:authority dct:URI http://www.srrb.noaa.gov/highlights/sunrise/sunrise.html Calculation Details PAGE
Location dct:spatial *** (space coverage class)***
Location dct:spatial Place Name dct:title GNIS
Location dct:spatial Decimal Latitude geo:lat GNIS
Location dct:spatial Decimal Longitude geo:long GNIS
Physical Resource dct:temporal Date dct:date PAGE
Physical Resource dct:temporal Julian Day ex:time#jd PAGE
Physical Resource dct:temporal Time Zone Designator ex:time#tzd CONUS
Physical Resource dct:temporal dct:PeriodOfTime ***(time coverage class)***
Physical Resource dct:temporal Elapsed Time Between Sunrise and Sunset ex:time/local/sol#duration PAGE
Physical Resource dct:temporal ex:time#Local ***(time coverage class)***
Physical Resource dct:temporal ex:time#Local Applicable Time Zone dct:description PAGE
Physical Resource dct:temporal ex:time#Local Start of Astronomical Twilight (Sun 18 Degrees below Horizon) ex:time/local/sol#startAstronomical USNO
Physical Resource dct:temporal ex:time#Local Start of Nautical Twilight (Sun 12 Degrees below Horizon) ex:time/local/sol#startNautical USNO
Physical Resource dct:temporal ex:time#Local Start of Civil Twilight (Sun 6 Degrees below Horizon) ex:time/local/sol#startCivil USNO
Physical Resource dct:temporal ex:time#Local Local Sunrise ex:time/local/sol#rise PAGE
Physical Resource dct:temporal ex:time#Local Sun Transit Time (aka Solar Noon) ex:time/local/sol#xsit PAGE
Physical Resource dct:temporal ex:time#Local Local Sunset ex:time/local/sol#set PAGE
Physical Resource dct:temporal ex:time#Local End of Civil Twilight (Sun 6 Degrees below Horizon) ex:time/local/sol#endCivil USNO
Physical Resource dct:temporal ex:time#Local End of Nautical Twilight (Sun 12 Degrees below Horizon) ex:time/local/sol#endNautical USNO
Physical Resource dct:temporal ex:time#Local End of Astronomical Twilight (Sun 18 Degrees below Horizon) ex:time/local/sol#endAstronomical USNO
Physical Resource dct:temporal ex:time#Local Local Moon Rise ex:time/local/luna#rise USNO
Physical Resource dct:temporal ex:time#Local Moon Transit Time ex:time/local/luna#xsit USNO
Physical Resource dct:temporal ex:time#Local Local Moon Set ex:time/local/luna#set USNO
Physical Resource dct:temporal ex:time#UTC ***(time coverage class)***
Physical Resource dct:temporal ex:time#UTC Applicable Time Zone dct:description PAGE
Physical Resource dct:temporal ex:time#UTC Sunrise UTC ex:time/utc/sol#rise PAGE
Physical Resource dct:temporal ex:time#UTC Sun Transit Time UTC ex:time/utc/sol#xsit PAGE
Physical Resource dct:temporal ex:time#UTC Sunset UTC ex:time/utc/sol#set PAGE
  1. Directions:
    Select a location from the City pulldown menu, OR select "Enter Lat/Long ->" from the pulldown menu, and manually enter the latitude, longitude and time zone information in the appropriate text boxes. The following sign conventions are used:

    Longitude: Latitude:
    Positive in Western Hemisphere Positive in Northern Hemisphere
    Negative in Eastern Hemisphere Negative in Southern Hemisphere

    Latitude and Longitude can be in deg/min/sec, or decimal degrees entered in the "Deg:" field. If you select a city from the pulldown menu, the latitude, longitude and time zone fields will be filled in automatically. If you want to input latitude, longitude or time zone manually, be sure to select "Enter Lat/Long -->" from the City pulldown box, or your numbers will be overwritten by the selected city's location.

  2. You can enter a different time zone for a location by selecting "Enter Lat/Long -->" in the City pulldown box. Otherwise, the time zone associated with the selected city's Local Standard Time will be automatically entered. Selecting "Yes" in the Daylight Saving field will cause the resulting sunrise, sunset and solar noon times to be adjusted forward one hour. If you are uncertain of the time zone for a location, refer to our Time Zone Table.

  3. The program retrieves the current date from your computer, and fills the month, day and year fields. To perform calculations for a different date, simply select a month in the pull down menu, and enter the day and four digit year in the appropriate input boxes. When entering a day or year, you will need to click the "Calculate Sunrise/Sunset" button to update the results for this date.

  4. Once the calculation results are displayed, you may use your web browser's "Print" function to obtain a hardcopy of the results.

  5. For locations above the Arctic Circle and below the Antarctic Circle, when a sunrise or sunset does not occur on the given day the program locates the local time and date of the most recent sunrise or sunset, and the next sunset or sunrise. When this occurs, the UTC fields will display "prior" or "next" information instead of the UTC times.

  6. NOTE: For latitudes greater than 72 degrees N and S, calculations are accurate to within 10 minutes. For latitudes less than +/- 72° accuracy is approximately one minute. See Solar Calculation Details for further explanation.


Solar Position Calculator
Calculation Details
Solar Calculator Links
NOAA Emblem Time Zone Table
Solar Calculator Glossary
Back to SRRB Homepage

by Chris Cornwall, Aaron Horiuchi and Chris Lehman

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