A script to model hourly solar irradiance?

Anyone knows of a script calculating the solar irradiance at each moment? Inputs would be the time of day, the date, the latitude... I have not been able to find a reliable one but, being something so common, there must be an existing model. Thank you for the help.

[Image Analyst]

Do you have actual data of your own, or you just want a table of "book" data from some reference site? And what kind of model do you want?

[Blanco Fernandez]

There are two approaches that would be useful to me. Basing the simulation on existing data of solar irradiance at each hour for the set location. Or calculating the solar irradiance based on the latitude, time of day, and date, through the calculations that are needed and using a Matlab script. What I am referring to in this question is more to the matlab script that is able to yield the solar irradiance curve for a day by just inputing the location and date.

[Image Analyst]

Attach your data and the formula for computing data at a given latitude and longitude, if you have one. If you have no formula, you might be able to use scatteredInterpolant if you have data from a certain, limited set of locations.