Aerial spherical panoramas used to be a "black art". Only a select few individuals had figured out how to successfully shoot a series of images from an RC helicopter that captured the entire environment below. Those few individuals kept their secrets only revealing little bits here and there.
Anyone interested in getting into shooting aerial spherical panoramas had to learn the "hard way"..... that was then. Now you have PhotoShip One!
Watch this tutorial on the basic elements required for acquiring images for a spherical aerial panorama.