psa-obj-c

PSA (Position Sun Algorithm) - Objective-C

The algorithm is supposed to work for the years -2000 to 6000, with uncertainties of +/-0.0003 degrees.

How to use it?

You'll have to import the PSAOCHeader.h file considering that you have added the library to your project, and that headers are correctly defined.

Use the convenient method of the PSAOCSPA object to get a PSAOCAzimuthZenithAngle object representing the Azimuth and Angle for the given parameters of when and where on earth.

PSAOCAzimuthZenithAngle *result = nil;

// Define the date you want
NSDate *chosenDate = [NSDate date];

// Define the place you want (here for example : Paris)
CLLocationDegrees longitude = 2.344894f;
CLLocationDegrees latitude = 48.860042f;

// Now ask for a result for when and where
result = [PSAOCSPA computeSolarPositionWithDate:chosenDate 
                                      longitude:longitude 
                                       latitude:latitude];

So now you should know how to use the result object. And free to you to use those values :-)

NSString * s = [[NSString alloc] initWithFormat:@"azimuth %.6f deg, zenith angle %.6f deg",
                result.azimuth,
                result.zenithAngle];
NSLog(@"%@", s);