If it's summer solstice and you're on the equator and it's noon, then the accuracy is bad. Otherwise, YMMV -- (literally!) https://academic.oup.com/astrogeo/article/52/3/3.12/187095
If it's summer solstice and you're on the equator and it's noon, then the accuracy is bad. Otherwise, YMMV -- (literally!) https://academic.oup.com/astrogeo/article/52/3/3.12/187095